Impact of 15N-labeled rice straw and rice straw compost application on N mineralization and N uptake by rice
محل انتشار: مجله تولید گیاهان، دوره: 2، شماره: 4
سال انتشار: 1387
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 206
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شناسه ملی سند علمی:
JR_IJPPG-2-4_002
تاریخ نمایه سازی: 17 مهر 1398
چکیده مقاله:
Incorporation of plant residues in soil affects N and C content and dynamics. This studydetermined the effects of short-term alternative rice (Oryza sativa L.) residue management on Nmineralization and uptake by rice. Pot and laboratory incubation experiments were established byincorporating 15N-labeled rice straw and rice straw compost in paddy soil. The 15N recovered by riceaveraged 16.6%; most of this recovered 15N-fertilizer was cycled through soil pools and only smallamounts originated from labeled rice residues. At harvest, denitrification rate of rice straw and ricestraw compost was 27.2% and 38.5%, respectively in the pot experiment, while residual N in soilranged from 56.2% and 55.1%, respectively. The incubation study showed that about 22-26% of Nfrom 15N-labeled rice straw was mineralized over a period of 105 days. Recovery of residual 15Nfertilizerappears to contribute little to total inorganic N. The results showed that rice residues exerteda small and short-term positive effect on N mineralization and N uptake.
کلیدواژه ها:
نویسندگان
A. Ghoneim
Rice Research & Training Center, Field Crops Research Institute, Agricultural Research Center, Egypt.