长期不同施肥对水稻土有机氮素矿化特性影响的研究  

Effect of different long-term fertilizing practices on nitrogen mineralization characteristic of paddy soil

作　　者：张玉玲[1] 张玉龙[1] 虞娜[1] 姬景红[1] 

机构地区：[1]沈阳农业大学土地与环境学院

出　　处：《植物营养与肥料学报》2008年第2期272-276,共5页Journal of Plant Nutrition and Fertilizers

基　　金：辽宁省重大农业攻关项目(2006215005)资助

摘　　要：通过定位试验研究了长期不同施肥措施对水稻土氮素矿化特性的影响。结果表明,长期不同施肥措施显著影响水稻土氮矿化势及矿化速率。与不施氮肥相比,单施氮肥使水稻土氮矿化势下降,矿化速率加快;氮肥与有机肥配施可极显著增加水稻土氮矿化势,降低矿化速率。在氮肥与有机肥配施的基础上,水稻插秧后接种"Azolla"固氮菌体可降低氮矿化势,提高矿化速率。Based on a 16-year long-term fertilization experiment with fixed site on paddy soil in Shenyang, Liaohe plain, the effect of long-term fertilization practices on nitrogen mineralization characteristic of paddy soil was studied. Results showed the nitrogen mineralization potential and mineralized rate was affected significantly by different long-term fertilization practices. Compared with control （no chemical nitrogen application）, single application of nitrogen fertilizer could decrease nitrogen mineralization potential but increase mineralization rate. Applying nitrogen fertilizer and manure could increase nitrogen mineralization potential very significantly and decrease mineralization rate. Applying chemical nitrogen fertilizer and manure and inoculating ＂Azolla＂ for 7-years after transplanting rice seedlings could decrease nitrogen mineralization potential and increase mineralization rate.

关 键 词：长期施肥 水稻土 氮矿化势 矿化速率 

分 类 号：S158[农业科学—土壤学]