摘要
研究了楝树籽不同方式的提取物 (NⅠ ,NⅡ )对普通铁质淋溶土壤、简育水耕人为土壤供N和N肥利用率的影响 .NⅠ可在一定程度上抑制这两种土壤产生NO3 N ,NⅡ在两种土壤上前期均能显著固定NH4+ N ,并在后期释放出NH4+ N .如果NⅠ和NⅡ 2种提取物同时与化肥N施入土壤 ,则可明显改善土壤的供N状况 ,使之与作物需N过程更吻合 .盆栽实验证明 ,NⅡ可显著提高肥熟旱耕人为土壤上作物对N肥的利用率 .
Incubation test and pot experiments were conducted with haplic luvisols and hydragric anthrosols to study the effects of neem seed extracts (NⅠ, NⅡ) on nitrification and immobilization of ammonium sulfate. NⅠ could significantly inhibit the nitrification of N applied to the two soils. NⅡ was effective in promoting the immobilization of NH 4 + N. Pot experiments showed that NⅡ could increase the use efficiency of chemical nitrogen significantly in fimic anthrosols.
出处
《应用生态学报》
CAS
CSCD
2002年第11期1417-1420,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金资助项目 (3 983 0 2 2 0 ) .
