太湖地区黄泥土表层氮库变化与水稻产量间的关系研究  

Effect of surface soil nitrogen pool on productivity of permeable paddy soil in Taihu Lake region of China

作　　者：郭汝礼[1] 沈明星 杨林章[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]苏州农业科学研究所,苏州215001

出　　处：《中国生态农业学报》2007年第6期48-50,共3页Chinese Journal of Eco-Agriculture

基　　金：科技部973项目(2005CB121108);中国科学院知识创新工程项目(KZCX2-413)资助

摘　　要：24年田间定位试验研究表明,长期不施肥处理和化肥PK配施处理土壤表层N呈下降趋势,而施入化肥N处理(包括化肥N、化肥NP配施、化肥NK配施、化肥NPK配施处理)N增加较缓慢,有机与无机肥结合处理土壤表层N增加迅速。以长期不施肥为对照,长期有机肥+NPK处理水稻增产最多,达35.94%。随着N肥的逐年施入,土壤表层全N含量与产量间由显著正相关关系变为相关性不显著。Twenty-four years（1980～2004） field experiment in Taihu Lake region of China has shown that rice yield is significantly influenced by soil nitrogen.No fertilization and application of P,K fertilizers reduce soil nitrogen pool,while the application of fertilizers with N（N fertilizer;N,P fertilizers;N,K fertilizers;N,P,K fertilizers）slowly increases the soil nitrogen pool.Unlike inorganic nitrogen,organic nitrogen incorporation（straw manure）facilitates soil nitrogen pool build-up.In contrast with zerofertilizer treatment,yield increase rate under NPK and organic fertilizer incorporation treatments is the highest,35.94%.With nitrogen application,the relationship between total surface soil nitrogen and rice yield changes from one of significant to an insignificant level.

关 键 词：长期施肥 土壤表层N库 水稻产量 黄泥土 太湖地区 

分 类 号：S714.8[农业科学—林学]