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Öğe Ammonia Volatilization From Ammonium-Sulfate, Ammonium-Nitrate, and Urea Surface-Applied to Winter-Wheat on a Calcareous Soil(MARCEL DEKKER INC, 1995) Gezgin, Sait; Bayraklı, Fethi.Ammonia (NH3) volatilization losses from surface-applied ammonium sulphate (AS), ammonium nitrate (AN), and urea to winter wheat and the effects of the NBPT [N-(n-butyl) thiophosphoric triamide], PG (Phosphogypsum), and PR (byproduct-Pyrite) were determined in a field experiment. Effects on grain yield and protein content of the grain were also measured. Total NH3 losses from AS, AN, and urea varied from 13.6-19.5%, 4.4-6.4%, and 3.9-12.0% depending on the compounds and their levels added to nitrogen (N) fertilizers, respectively. The compounds added to AS and AN increased NH3-N losses with respect to unamended fertilizers (control). On the other hand, while urea treatments with two tons of PG/ha increased NH3 losses, the other compounds decreased the losses. The highest reductions of NH3 loss were observed with NBPT 0.50% and NBPT 0.25% by 63.4% and 52.8%, respectively. Although the effect of nitrogeneous fertilizers on total N losses and protein content of wheat grain was found statistically significant (p<0.01), as the compounds applied with N fertilizers have had no significant effect. Also, a negative and highly significant correlation (r = -0.69***) was found between total N loss and protein content of the grain.Öğe Antioxidant responses of pumpkin genotypes exposed to drought stress conditions(ELSEVIER SCIENCE BV, 2018) Hamurcu, Mehmet; Avsaroglu, Zuhal Zeynep; Ustun, Canan; Omay, Humeyra; Gezgin, Sait; Hakki, Erdogan Esref; Pandey, Anamika[Abstract not Available]Öğe Assessment of genetic variability for grain nutrients from diverse regions: potential for wheat improvement(SPRINGER INTERNATIONAL PUBLISHING AG, 2016) Pandey, Anamika; Khan, Mohd Kamran; Hakki, Erdogan E.; Thomas, George; Hamurcu, Mehmet; Gezgin, Sait; Gizlenci, OzgeBackground: A total of 150 bread wheat genotypes representing 121 Indian and 29 Turkish origin were screened for nutrient concentrations and grain protein content. Elemental and grain protein composition were studied by Inductively Coupled Plasma-Atomic Emission Spectrophotometer and LECO analyser, respectively. The study was performed to determine the variability in nutrient concentrations present in the collected wheat genetic material from two countries. Results: Several fold variations among genotypes existed for almost all the elements. Three major components of principal component analysis (PCA) revealed 60.8% variation among the genotypes. Nutrient variables segregated into two groups, one group containing all the macroelements except sulphur; and another cluster containing proteins and all the microelements except Zn and Mn. Pearson correlation analysis and heat-map were in accordance with each other determining strong positive association between P-K, Mn-Zn, Mg-S and Cu-protein content. Also, PCA and hierarchical grouping divided all the Indian and Turkish genotypes in two main clusters. Conclusions: Nutritional profile differentiated the genotypes from two countries into separate groups. However, some of the varieties were closely associated and indicated the success of global wheat exchange programs. While most of the correlations were in agreement with the previous studies, non-association of zinc with grain protein content directed towards its control by some other genetic factors. Some of the experimental wheat varieties with promising nutrient content have been suggested for future wheat advancement programs. Results obtained will be supportive for breeders involved in wheat biofortification programs, food industries and people relying on whole grain wheat products.Öğe Biochemical effects of drought stress on two Turkish watermelon varieties are different and influenced by nitric oxide(ELSEVIER SCIENCE BV, 2016) Hamurcu, Mehmet; Hakki, Erdogan Esref; Demiral, Tijen; Gezgin, Sait[Abstract not Available]Öğe Bor elementinin bitkiler için önemi(2017) Güneş, Aydın; Gezgin, Sait; Kalınbacak, Kadriye; Özcan, Hesna; Çakmak, IsmailBitkilerde bor noksanlığı, en çok kumlu ve organik maddesi düşük olan, yıkanmanın fazla olduğu ve kireçlemenin sıklıkla yapıldığı asit topraklarda ortaya çıkar. Ayrıca, bor adsorpsiyonu/fiksasyonu yüksek olan killi ve pH'sı yüksek topraklarda da bor noksanlığına rastlanmaktadır. Bor noksanlığının ortaya çıkışıyla birlikte öncelikle hücre duvarlarının oluşumu, yapısal bütünlüğü ve işlevi zarar görmektedir. Bitkilerdeki borun yaklaşık % 90'a varan bölümü, hücre duvarlarında yapısal bir element olarak yer almakta ve biyolojik membranların stabilitesini korumaktadır. Bu özelliği ile bor, bitkinin büyüme ve verimi üzerinde ve besin elementi alımında belirleyici bir role sahiptir. Bitkilerin hücre duvarlarında pektin maddesine bağlı olarak bulunan bor, hücre duvarlarına önemli bir sağlamlık ve bütünlük kazandırmaktadır. Böylece bor bitki dokularını, patojen girişine ve enfeksiyona karşı koruyucu bir rol üstlenmekte ve bitkilerin hastalıklara karşı direncini arttıran önemli bir besin elementi olarak karşımıza çıkmaktadır. Borun en dikkat çekici işlevlerinden birisi de, polen oluşumu /tozlaşma, döllenme ve meyve tutumundaki rolüdür. Çoğunlukla, bor noksanlığı çeken bitkilerde vejetatif büyüme etkilenmezken, generatif büyümede ve meyve oluşumunda ciddi azalmalar ortaya çıkar. Bor bitki içinde floem iletim demetinde zor taşınan bir element olarak bilinir ve noksanlık belirtileri genç yapraklarda ve sürgünlerde ortaya çıkar. Bu yüzden, özellikle çiçeklenme ve meyve/tane oluşum döneminde yapraklardan bitkilere kontrollü bir bor gübrelemesinin yapılması yüksek verim için bir verimi garanti etmek adına önemlidir. Bor noksanlığı problemi, topraklarda veya yapraklarda borun yeterli olması durumunda dahi ortaya çıkabilir. Bu durum, daha çok hava neminin yüksek ve transpirasyonun düşük olduğu koşullarda belirgin biçimde ortaya çıkar. Hücre duvarı kompozisyonu ve pektin maddesi miktarına bağlı olmak üzere bitkilerin bor gereksinimi türden türe önemli farklılıklar göstermektedir. Genelde, tahıllar gibi bor gereksinimi düşük olan bitkilere 100 -200 g/da bor önerilirken; bu oran, şeker pancarı, kolza, ayçiçeği gibi bora gereksinimi yüksek olan bitkilerde 400 g'açıkabilmektedir. Yapraktan yapılacak bor gübrelemesinde ise genelde kabul gören oran 250-300 mg B/litre olacak şekilde önerilmektedir.Öğe Bor Miktarı Yüksek Topraklarda Yetiştirilen Makarnalık Buğday (Triticum Durum L.) Çeşitlerine Uygulanan Borun Verim ve Bazı Verim Öğelerine Etkisi(2003) Taner, Seyfi; Sade, Bayram; Kaya, Yasin; Çeri, Sait; Gezgin, SaitBünyesinde yüksek bor (12,92 mg kg"1) içeren, Bahri Dağdaş Uluslararası Tarımsal Araştırma Enstitüsü Merkez deneme tarlasında; 2001-2002 ekim sezonunda gerçekleştirilen bu çalışmada; Kunduru 1149, Altıntaş, Altın 40/98, Kızıltan 91, Ç-1252, Selçuklu 97, Çakmak 79, Ankara 98 ve Yılmaz 98 makarnalık buğday çeşitlerinin yüksek bor içeren alanlarda bor uygulamasız ve bor uygulamalı (0,9 kg/da) parsellerde verim ve bazı verim öğelerindeki değişimin üzerinde çalışılmıştır. Bor uygulaması ile bitki çıkışlarında artışlar olurken, tane veriminde kontrole göre önemli düşüşler olmuştur. Bor uygulamasının, metrekarede başak sayısı, bitki boyu ve bayrak yaprak bor miktarı üzerine etkisi istatistik! olarak önemli olmamıştır. Ele alman tüm özelliklerde çeşitler arasındaki farklılık istatistiki olarak önemli bulunmuştur. Tane verimi yönüyle ilk üç sırayı alan Kızıltan 91, Yılmaz 98 ve Altıntaş makarnalık buğday çeşitlerinin metrekarede daha fazla başak sayısı ve bayrak yaprakta daha düşük bora sahip oldukları belirlenmiştir. Korelasyon analizi sonuçlarına göre; bayrak yapraktaki bor miktarı ile tane verimi arasında, negatif önemli ilişkiler belirlenmiştir (r-0.460**). Ayrıca, bayrak yaprak bor miktarı ile metrekarede başak sayısı ve bitki boyu arasında negatif önemli ilişkileri (sırasıyla; r -0.273*, r -0.289*) belirlenmiştir. Araştırmadan; deneme alanında toksik düzeyde borun varlığı dikkate alındığında Kızıltan 91, Yılmaz 98 ve Altıntaş makarnalık buğday çeşitlerinin bor toksik alanlarda daha başarılı olarak yetiştirilebilecekleri sonucu çıkarılabilir.Öğe Bor Uygulamasının Şeker Pancarının Verim ve Kalitesine Etkisi(2001) Gezgin, Sait; Hamurcu, Mehmet; Apaydın, MustafaThis research was conducted to determine the effects of application methods and the levels of boron on the root yield and quality of sugar beet in the Konya-Altınekin plain. The experimental soil was sandy loam, poor in organic matter and rich in calcium carbonate. The soil was alkaline in reaction and sufficient in boron content (0.55 ppm). In this work, three different levels of boron in borax form (0, 0.3 and 0.6 kg B/da) were applied with five different methods (soil, leaf, seed, soil leaf, seed leaf). The results showed that the root yield and refined sugar yield of sugar beet with "soil leaf'', "soil'', and "leaf'' application methods of boron at the level of 0.3 kg/da over the controls were increased by 12.5%, 12.1%, 11.1% and 8.7%, 18.3%, 3.5%, respectively. On the other hand, increasing levels of boron applied with the same methods to the soil decreased the root and refined sugar yield. However, with the "seed'' and '"seed leaf'' application methods of boron at the levels of 0.3 and 0.6 kg/da, the root and refined sugar yield, as compared to controls, decreased by 17.8%, 12.5% and 23.7%, 0.35%, and 31.0%, 20.1% and 37.5%, 14.7%, respectively. While the root sugar content and refined sugar content varied depending on the application methods and levels of boron, they were generally lower than the controls in terms of the boron applications. The highest yield and the highest quality of sugar beet were obtained with the soil application method of boron at the level of 0.3 kg/da as borax material.Öğe Bor Uygulamasının Şeker Pancarının Verim ve Kalitesine Etkisi(TÜBİTAK, 2001) Gezgin, Sait; Hamurcu, Mehmet; Apaydın, MustafaThis research was conducted to determine the effects of application methods and the levels of boron on the root yield and quality of sugar beet in the Konya-Altinekin plain. The experimental soil was sandy loam, poor in organic matter and rich in calcium carbonate. The soil was alkaline in reaction and sufficient in boron content (0.55 ppm). In this work, three different levels of boron in borax form (0, 0.3 and 0.6 kg B/da) were applied with five different methods (soil, leaf, seed, soil + leaf, seed + leaf). The results showed that the root yield and refined sugar yield of sugar beet with "soil + leaf", "soil", and "leaf" application methods of boron at the level of 0.3 kg/da over the controls were increased by 12.5%, 12.1%, 11.1% and 8.7%, 18.3%, 3.5%, respectively. On the other hand, increasing levels of boron applied with the same methods to the soil decreased the root and refined sugar yield. However, with the "seed" and "seed + leaf" application methods of boron at the levels of 0.3 and 0.6 kg/da, the root and refined sugar yield, as compared to controls, decreased by 17.8%, 12.5% and 23.7%, 0.35%, and 31.0%, 20.1% and 37.5%, 14.7%, respectively. While the root sugar content and refined sugar content varied depending on the application methods and levels of boron, they were generally lower than the controls in terms of the boron applications. The highest yield and the highest quality of sugar beet were obtained with the soil application method of boron at the level of 0.3 kg/da as borax material.Öğe Boron Content of Cultivated Soils in Central-Southern Anatolia and Its Relationship with Soil Properties and Irrigation Water Quality(Kluwer Academic/Plenum Publ, 2002) Gezgin, Sait; Dursun, Nesim; Hamurcu, Mehmet; Harmankaya, Mustafa; Önder, Mustafa; Sade, Bayram; Topal, Ali; Soylu, Süleyman; Akgün, Necdet; Yorgancılar, Mustafa; Ceyhan, Ercan; Çiftçi, Nizamettin; Acar, Bilal; Gültekin, İrfan; Işık, Yusuf; Cevdet, Şeker; Babaoğlu, MehmetBoron toxicity may occur in semi-arid regions due to high levels of B in soils, in the ground water, in fertilisers or in irrigation water (U.S. Salinity Lab. Staff, 1954; Nable et al., 1997). Boron availability is affected by soil properties, principally pH, salt content, organic matter, lime, soil texture and exchangeable cations (Keren and Bingham, 1985; Sakal and Singh, 1995; Rahmatullah et al, 1999). According to Wilcox and Durum (1967), the minimum B concentration in irrigation water for a given crop species that does not reduce yield or lead to injury (symptoms) ranged from 0.3 to 1.0 mg B I¹ for sensitive crops, to 1.0 to 2.0 mgl¹ for semi-tolerant crops, and 2.0 to 4.0 mgl¹ for tolerant plant species.Öğe Boron deficiency responses on nutrients composition in brachypodium distachyon, a model for wheat(ELSEVIER SCIENCE BV, 2017) Pandey, Anamika; Khan, Mohd Kamran; Hamurcu, Mehmet; Gezgin, Sait; Hakki, Erdogan Esref[Abstract not Available]Öğe Comparative evaluation of some macro- and micro-element and heavy metal contents in commercial fruit juices(SPRINGER, 2012) Harmankaya, Mustafa; Gezgin, Sait; Özcan, Mehmet MusaMicro- and macro-element contents of several commercial fruit juices purchased from marked were determined by inductively coupled plasma atomic emission spectroscopy. Among the minor elements determined, Zn, Cu, Mn, Mo, Co, Cd and Ni were found to be lover. Major mineral contents of fruit juices were established as Ca, K, Mg and P. The potassium contents of fruit juices were determined at the higher levels. K contents of fruit juices ranged between 475 mg/kg (B apricot) and 1478 mg/kg (B peach). In addition while Ca contents of fruit juices change between 19.3 mg/kg (E cherry) and 81.8 mg/kg (C orange), Mg contents ranged at the levels between 23.7 mg/kg (A apricot) and 65.4 mg/kg (D orange). Generally Ca and contents of peach, orange and apricot juices that belong to A and D companies were determined at the high levels.Öğe Controlling Ammonia Volatilization from Urea Surface Applied to Sugar Beet on a Calcareous Soil(MARCEL DEKKER INC, 1996) Bayraklı, Fethi; Gezgin, SaitThe extent of ammonia (NH3) volatilization from surface-applied urea to sugar beet and effects of NBPT [N-(n-butyl) thiophosphoric triamide] PG (phosphogypsum), PR (by-product-pyrite) and KCl (potassium chloride) on NH3 volatilization, nitrogen (N) content of leaf blades and petioles, sugar, amine N, and refined sugar contents, and root and refined sugar yields were determined in the field. Total NH3 loss varied from 7.0% to 23.6% depending on the compounds incorporated with urea and rate of addition. With respect to unamended urea, 540 kg KCl/ha, 1000 kg phosphogypsum/ha, and 1000 kg pyrite/ha increased NH3 loss by 86.7%, 40.1%, and 36.2%, respectively, but the other treatments decreased the loss. The highest reduction of NH3 loss was found with 0.5% of NBPT by 44.5%. The NBPT, KCI, and PG treatments increased both root and refined sugar yields compared with urea alone. The highest refined sugar yield and lowest NH3 volatilization loss was obtained with 0.5% of NBPT treatment.Öğe Değişik Azot Kaynaklarının Patates Bitkisinin Verim ve Bazı Özelliklerine Etkisi(TUBITAK, 1998) Gezgin, Sait; Uyanöz, ŞerifeIn this investigation, the effects of some slow release and conventionally used fast release nitrogen sources in the soils of Ni?de-Misli plain on tuber yield, and protein, starch and NO- 3 contents of tubers of the potato plants grown under greenhouse conditions were determined. Effect of nitrogen levels on tuber yield, as mean of nitrogen sources were found as follows: N2>N1>N4>N3>N 0. On the other hand, increasing levels of nitrogen applied to the soil increased the protein and starch contents of the potato tubers. The highest and lowest tuber yield as mean of N levels was obtained with AS+AZN and AS+PG respectively. According to efficiency of nitrogen sources on tuber yield, nitrogen sources were grouped as: first group AS+AZN, AS+SCU, AZN, FLD; second group FLD, SCU; third group SCU, AS+FLD, AS+N-serve and last group AS, AS+PG. Differences between the groups were is statistically significant (p<0.05). AS+PG (AS+Phosphogypsum). AS (Ammonium sulfate) and AS+N-serve applications caused the highest increase in the starch content but the lowest increases in the tuber yield and protein contents of the tubers. Effects of various nitrogen sources and levels varied on the NO- 3 content of the tuber; the highest NO- 3 content was determined with the AS, where as the lowest NO- 3 contents with the AS+N-serve. SCU (Sulphur coated urea), FLD (Floranid) and the AS+PG and AZN (Azolon) sources.Öğe Değişik Azot Kaynaklarının Patates Bitkisinin Verim ve Bazı Özelliklerine Etkisi(1998) Gezgin, Sait; Uyanöz, ŞerifeBu araştırmada Niğde-Misli Ovası’nda yaygın olarak kullanılan hızlı çözünür azot kaynakları ile birlikte bazı yavaş çözünen azot kaynaklarının sera koşullarında patates bitkisinin yumru verimine, yumruda protein, nişasta ve nitrat kapsamına etkileri ortaya konulmaya çalışılmıştır. Azot kaynatlarının ortalaması olarak, patatesin yumru verimi en yüksek N2 dozunda olup bunu N_1, N_4, N_3 ve N_0 dozları takip ederken, protein ve nisasta kapsamı uygulanan azot dozu arttıkça yükselmistir. Azot dozlarının ortalaması olarak, en yüksek yumru verimi ASAZN, en düsük ASFJ uygulamalarından elde edilirken, yumru verimine etkileri bakımından azot kaynaklarından ASAZN, ASKKÜ, AZN. FLD birinci; FLD, KKÜ ikinci; KKÜ, ASFLD, ASN-serve üçüncü; AS, ASFJ son grubu olusturmuslardır. Gruplar arasındaki farklar istatiski olarak önemli bulunmustur (p0.05). En az yumru verimi ve protein artısı saglayan ASFJ (ASFosfojips), AS (Amonyum sülfat), ASN-serve uygulamaları en fazla nisasta artısına sebep olmustur. Yumrunun NO3 azotu kapsamı üzerine degisik azot kaynakları ve dozlarının etkisi farklı olup, en yüksek NO3 azotu AS, en az ise ASN-serve, KKÜ (Kükürtle kaplı üre), FLD (Floranid) ve daha sonra ASFJ ve AZN (Azolon) uygulanan muamelelerde saptanmıştır.Öğe Determination of Minerals Extracted From Several Commercial Teas (Camellia Sinensis) to Hot Water (Infusion)(Mary Ann Liebert, Inc, 2006) Gezgin, Sait; Özcan, Mehmet Musa; Atalay, EmineMineral contents of some tea and their infusions drunk in Turkey were established by inductively coupled plasma atomic emission spectrometry. The Al, Ca, K, Mg, Mn, P, and S contents were very high in both infusions and tea (i.e., pieces of the tea plant). The As, Cd, Cr, Li, Ph, and Se contents of infusion and tea were found to be very low. The level of K of all samples is higher than those of other minerals. Generally, mineral contents of tea were found to be higher than those of tea infusions. In addition, the health benefits of teas and knowledge of their mineral contents are of great interest and may be useful for further study of enzyme systems and vital biochemical functions.Öğe Determination of wild wheat genetic resources that can contribute best to boron toxicity tolerance in cultivars(ELSEVIER SCIENCE BV, 2007) Hakki, Erdogan E.; Uygan, Songul; Babaoglu, Mehmet; Topal, Ali; Gezgin, Sait[Abstract not Available]Öğe Effect of cultivars on evaluation of leaf analysis of apple trees(INT SOC HORTICULTURAL SCIENCE, 2016) Uçgun, Kadir; Gezgin, Sait; Akgül, Hüseyin; Atasay, Adem; Harmankaya, Mustafa; Altındal, MesutLeaf analysis is used as a standard method for determination of the nutritional status of apple orchards in the middle of vegetation, but not take into consideration the differences among cultivars in the evaluation of results of leaf analysis. In 2010-2011 years, this study was performed on leaves collected from two different regions in Isparta, Turkey where apple is cultivated for determining the effect of cultivars on evaluation of the results of leaf analysis. In the middle of vegetation, leaves were collected from 68 orchards which consist of 'Starking Delicious', 'Golden Delicious', 'Granny Smith' and 'Spur Delicious', and contents of N, P, K, Ca, Mg, Mn, Zn, and B were determined. The cultivars showed statistically significant differences in terms of N, P, K, Mg and B contents. According to the results of this study, it was determined that cultivars should be taken into consideration in the evaluation of leaf analysis.Öğe Effect of selenium application on selenium and macro-micro nutrients content of grain maize in Turkey(2018) Delıboran, Aise; Işık, Yılmaz; Aslan, Hasan; Nacar, Abdullah Suat; Kara, Hatice; Harmankaya, Mustafa; Gezgin, SaitSelenium is essential for both humans and animals, and must be taken with nutrients in sufficientamount. Concentration of selenium in the food for both human and animal is desired between 100-1000 ?gkg-1. This study conducted field experiments on the Harran Plateau to investigate; the effect of soilapplications in form of selenite on maize grain yield and Se content; the efficiency of soil application; therelationship between Se content in maize grain and Se application rate; and the effect of Se fertilisers onmacronutrients and other micronutrients in grain maize. In this study, DKC 5783 F1 which is grownintensively in the area as a grain maize variety, sodium selenite was used as selenium source with eightlevels (0-5-10-15-25-50-75-100 g Se ha-1). Sodium selenite was applied to the soil in liquid form beforesowing. Sodium selenite application didn’t affect the total Ca, Mg, S, Zn, B, Mo and Se content of grain,but it affected N, P, K, Fe, Cu and Mn content, statistically.Öğe Effects of application boron on yields, yield component and oil content of sunflower in boron-deficient calcareous soils(ACADEMIC JOURNALS, 2008) Ceyhan, Ercan; Onder, Mustafa; Ozturk, Ozden; Harmankaya, Mustafa; Hamurcu, Mehmet; Gezgin, SaitThe study was conducted to investigate the effects of five boron ( B) doses; 0, 2.5, 5.0, 7.5 and 10.0 kg B ha(-1) in B-deficient calcareous soils on yield and some yield components of four sunflower genotypes. Genotypes have shown variations with respect to their responses to B applications. AS-615 and Coban had the highest seed yield (3.75 and 3.23 t ha(-1), respectively) at 7.5 kg B ha(-1), whereas S-288 and TR-4098 yielded 4.17 and 3.28 t ha(-1), respectively, at 0 kg B ha(-1). Therefore, S-288 and TR-4098 can be indicator genotypes for B toxicity. The other genotypes appeared to have high sensitivity to B deficiency. For AS-615 and Coban, application at 7.5 kg B ha(-1) level was found to be sufficient for adequate grain yield, whereas further B levels might have detrimental effects on grain yield.Öğe Effects of potassium, magnesium, and sulphur containing fertilizers on yield and quality of sugar beets (Beta vulgaris L.)(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2009) Zengin, Mehmet; Gokmen, Fatma; Yazici, M. Atilla; Gezgin, SaitEffects of potassium (K), magnesium (Mg), and sulphur (S) containing fertilizers on root yield, refined sugar yield, and K, Mg, and S concentrations of leaf of sugar beet (Beta vulgaris L.) were studied on 3 different locations in Konya province, namely Kuzucu, Karaarslan, and Alakova, in 2004, 2005, and 2006. In the trails, a uniform diammonium phosphate (DAP) + urea application was used as the control treatment, while potassium sulphate and Mg containing Kalimagnesia, were applied at varying rate combinations. Compared to the control treatment (DAP + urea), all fertilizer treatments containing K, Mg, and S increased root yield in the Kuzucu and Alakova locations, while in the Karararslan location only potassium sulphate treatment improved root yield. The Kalimagnesia fertilizer containing all 3 nutrients, namely K, Mg, and S, enhanced root yield by 42% and 39% in the Kuzucu and Alakova locations, respectively. But, this yield-stimulating effect of the Kalimagnesia fertilizer was rate-dependent. Kalimagnesia was also effective in improving the sugar content of the root, while the amino-N levels were not consistently affected by the fertilizer treatments. Despite increases in the leaf concentrations of K, Mg, and S by the tested fertilizers, the changes in the leaf concentrations of these nutrients could not fully explain the increases in root yields. In the discussion of the results, the possible role of basic cation saturation ratios of soils was also taken into consideration. The results indicate that a fertilizer treatment including 81 kg K(2)O ha(-1), 27 kg Mg ha(-1), and 46 kg S ha(-1) may be recommendable in fertilization of sugar beets, together with regular nitrogen and phosphorus applications, under similar conditions, in order to achieve a balanced mineral nutrition and sustain better root and sugar yields.
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