首页|Effect of Root Extracts of Brachiaria humidicola on Fertilizer Nitrogen Use Efficiency in Rice and Wheat Crops
Effect of Root Extracts of Brachiaria humidicola on Fertilizer Nitrogen Use Efficiency in Rice and Wheat Crops
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A pot experiment was conducted in 2009-2010 to study the effect of root extracts of Brachiaria humidicola on fertilizer nitrogen use efficiency in rice and wheat crops. The experiment was conducted with rice (var.Pusa Sugandh-5) as the test crop in kharif season and in rabi season wheat (var. HD-2894) was grown as the test crop with seven treatments. Three level of nitrogen were applied as 30, 60 and 90 mg N kg~(-1) soil through ~(15)N labelled (NH_4)_2SO_4 as source of N. Recommended dose of P (30 mg P_2O_5 kg~(-1) soil) and K (30 mg K_2O kg~(-1) soil) through KH_2PO_4 and KC1 were applied. Nitrogen levels and inhibitors had significant effect on rice grain yield. It was maximum 20.37 g pot~(-1) in case of T_4 (buffer solution extract) and low 13.10 g pot~(-1) in T_7 (control). Nitrogen uptake in rice straw was found more in BNI treatments as compared to plant based (neem oil coating) and standard nitrification inhibitors. Nitrogen use efficiency in rice plant was highest in case of T_1 (70 % alcohol extract) 41.90 followed by T_4 (buffer solution extract) 41.30. Among the treatments T_5 (neem oil coating) performed better in wheat yield as compared to other treatments. Nitrogen uptake and NUE were maximum in T_3 (salt solution extract) followedby T_5 (neem oil coating) in wheat crop. The maximum nitrogen use efficiency was observed at 60 mg N kg~(-1) soil as compared to other levels.
Nitrogen Use EfficiencyRiceWheat~(15)N- ammonium sulphateDCDB. humidicola
H.M. MEENA、M.S. SACHDEV、PAMELA SACHDEV
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Nuclear Research Laboratory, Indian Agricultural Research Institute, New Delhi - 110012
NSTL
