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[Effects of neem seed extracts on nitrogen use efficiency in two different soils]
Xiaoxiao Zhang1, Qirong Shen, Jiankang Tan
1Resource and Environment Science College, Nanjing Agricultural University, Nanjing 210095. zhangxiaoxiao-nau@163.net
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|March 11, 2003
Abstract:
Incubation test and pot experiments were conducted with haplic luvisols and hydragric anthrosols to study the effects of neem seed extracts (N I, N II) on nitrification and immobilization of ammonium sulfate. N I could significantly inhibit the nitrification of N applied to the two soils. N II was effective in promoting the immobilization of NH4+(-)N. Pot experiments showed that N II could increase the use efficiency of chemical nitrogen significantly in fimic anthrosols.