Author/Authors :
ERDEM, Halil Gazi Osmanpasa Üniversitesi - Ziraat Fakültesi - Toprak ve Bitki besleme Programı, Turkey , DÖLEK, Nuri Çukurova Üniversitesi - Ziraat Fakültesi - Toprak ve Bitki besleme Programı, Turkey , YARDIM, Pınar Çukurova Üniversitesi - Ziraat Fakültesi - Toprak ve Bitki besleme Programı, Turkey , ÖZDEMIR, Osman Çukurova Üniversitesi - Ziraat Fakültesi - Toprak ve Bitki besleme Programı, Turkey , TOLAY, İnci Akdeniz Üniversitesi - Teknik Bilimler Meslek Yüksek Okulu - Çevre Koruma ve Kontrol Programı, Turkey , TORUN, M. Bülent Çukurova Üniversitesi - Ziraat Fakültesi - Toprak ve Bitki besleme Programı, Turkey
Abstract :
Nitrogen (N) level in nutrition conditions has been reported to be very important in affecting nutritional level of plants with sulphur (S). To test this finding, under greenhouse conditions in wheat, the effect of different S (0, 25, 50, 100 and 200 mg S kg-1) and N (50, 100, 200, 400 and 800 mg N kg-1) application doses on dry matter yield of plant, spad reading (on chlorophyll content), S and N concentration in shoot and N:S ratio was determined. According to the obtained results, while spad value was 34 under the lowest N dose without S application, the same value was seen to be 38 under the highest S application. Whereas S applications were found to lead significant increases in spad value under optimum (200 mg kg-1) and high N (400 and 800 mg N kg-1) doses and this value was determined to reach even 53. Apart from these findings, under the lowest N application (50 mg N kg-1) dry matter yield of plants in 0, 25, 50, 100 and 200 mg kg-1 S applications was determined to be 0.97, 0.94, 0.95, 0.98 and 1.00 g plant-1, respectively. Under the same N dose, compared to application without S, increase in yield obtained with the highest S application was found to be only 3%. Whereas, compared to without S application under optimum N application, increase in yield obtained with 25, 50, 100 and 200 mg kg-1 S applications was found to be 16%, 7%, 21% and 15%, respectively, under optimum N application. Under 400 mg kg-1 N dose, the level of yield increase by application of S to the soil was found to decrease compared to that of optimum N dose, and S application was seen to affect not much yield under the highest N dose. The results suggest that, level of yield increase by S applications is high when the nutritional level of plant with N is optimum, whereas it is insufficient when the nutritional level of plants with N is low or excessive. Implementation of a balanced S and N fertilizer program in wheat seems to be extremely important with respect to yield and quality.
NaturalLanguageKeyword :
Sulphur , nitogen , wheat , shoot dry weight , chlorophyll
