摘要
通过盆栽试验研究了秸秆生物有机肥的施用对土壤供氮能力的影响 .结果表明 ,与原始秸秆相比 ,秸秆生物有机肥与尿素配合施用能明显提高土壤生物量碳、氮的含量 ,增幅约为 3～ 4倍 ;土壤微生物量氮与土壤的供氮能力关系非常密切 ,前期发生强烈的微生物增殖过程 ,则中后期必会发生无机氮释放过程 .这对作物的生长发育极为重要 ,同时提高了肥料氮利用率 ,揭示了秸秆生物有机肥配施无机氮肥改善土壤供氮能力的机理 .
Pot experiment was carried out to study the effect of application bioorganic manure on soil nitrogen supplying characteristics. Compared with the application of raw rice straw,a combined application of bio organic manure and inorganic nitrogen fertilizer could boost the content of microbial biomass carbon and nitrogen,and the increased percentage could be 300～400 %. A strong immobilization of nitrogen by microorganisms was always followed by a net N mineralization, which was mostly favorable for the growth and development of plant,and improved the use efficiency of nitrogen fertilizer.
出处
《应用生态学报》
CAS
CSCD
2002年第12期1575-1578,共4页
Chinese Journal of Applied Ecology
基金
国家自然科学基金重点项目 (3 983 0 2 2 0 )
国家科技部 863资助项目 (2 0 0 1AA2 460 81)
