Sharma, Vikas ， Mir, Sajad H. ， Sharma, Anil
2016-01-19 COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS 2016 47(卷), 2(期), (194-202页)
Nitrogen-use efficiency can be enhanced through an understanding of the nitrogen (N) mineralization behavior of organic sources. An incubation study was conducted to assess the impact of organic manures on N mineralization. The manures, farmyard manure (FYM), Leucaena leucocephala, and poultry manure, were applied to the soil alone or along with urea. There was a rapid increase in the amount of mineral N released with a peak appearing either at 14days (+urea treatments) or 21days (manure only) of aerobic incubation. Thereafter the net N mineralized decreased gradually and levelled off beyond day 56. Overall the cumulative net N mineralized after 98days of incubation was in the order urea > Leucaena + urea > poultry manure + urea (>) FYM + urea > Leucaena > poultry manure > FYM > zero N. The potentially mineralizable N (N-0) was lower in treatments where urea was not applied.