اثر بازدارنده نیترات سازی ۳ و ۴ دی متیل پیرازول فسفات بر جذب نیتروژن، اجزای عملکرد و عملکرد گندم در شرایط گلخانه

Abstract

A pot experiment was conducted to elucidate the effects of nitrification inhibitor (NI) 3, 4-dimethylpyrazole phosphate (DMPP) on the nitrogen uptake, yield components, yield and grain protein content of spring wheat (Triticum aestivum L.) cv. Bahar during 2011 at ShahreKord University. A factorial experiment in randomized complete block design was carried out with two factors of type of N fertilizer (1- control with no added N fertilizer, 2-urea 3- ammonium sulphate nitrate (ASN) and 4- ASN plus DMPP) and soil type (10 soils) with three replications. The results indicated that application of nitrification inhibitor DMPP with ASN led to significant increase (P<0.05) of shoot N uptake as well as grain and straw dry weight of wheat in soils no. 1, 2, 3, 6, 8 and 9 compared to ASN and urea. However, in the most of studied soils, application of nitrification inhibitor DMPP had not significant effect on the yield components and grain protein content of wheat. The greatest quantity of grain dry weight and shoot N uptake (11.28 g pot-1 and 288.73 mg pot-1, respectively) were obtained in soil no 2 with ASN plus DMPP – 16.3% and 14.9% greater than those obtained with urea. The results of this study suggest that the nitrification inhibitor DMPP could improve nitrogen uptake as well as grain and straw yields of wheat.