title: [Effects of neem seed extracts on nitrogen use efficiency in two different soils].
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.
authors.affiliation: Resource and Environment Science College, Nanjing Agricultural University, Nanjing 210095. zhangxiaoxiao-nau@163.net
authors.forename: Xiaoxiao
authors.initials: X
authors.lastname: Zhang
authors.forename: Qirong
authors.initials: Q
authors.lastname: Shen
authors.forename: Jiankang
authors.initials: J
authors.lastname: Tan
authors.forename: Zesheng
authors.initials: Z
authors.lastname: Mao
mesh_terms: D031601:Azadirachta / Q000737:chemistry*; D005308:Fertilizers; D009584:Nitrogen / Q000378:metabolism*; D010936:Plant Extracts; D012639:Seeds / Q000737:chemistry*; D012987:Soil
chemical_list: D005308:Fertilizers; D010936:Plant Extracts; D012987:Soil; D009584:Nitrogen