绿肥压青对棉田土壤肥力的影响  

Effect of Green Manure Application on Soil Fertility in Cotton Fields

作　　者：李银平[1] 徐文修[1] 李钦钦[1] 赵双印[1] 杨涛[1] 侯松山[1] 

机构地区：[1]新疆农业大学农学院,乌鲁木齐830052

出　　处：《新疆农业科学》2009年第2期262-265,共4页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区科技厅攻关项目"棉田用养制度关键技术研究与示范"(2001BA507A-10);农业部公益性行业(农业)科研专项(nyhyzx07-005)"棉花简化种植节本增效生产技术研究与应用";农业部行业项目"西北绿洲灌区现代农作物构建及配套技术研究"(2006BAD21B02-1)

摘　　要：选用草木樨、毛苕子、沙打旺三种绿肥在连作棉田上进行压青试验,研究三种绿肥生物量、植株养分含量及压青后对连作棉田土壤养分的影响。结果表明:三种绿肥中均以草木樨的生物量和植株养分含量最高;三种绿肥压青后对棉田土壤有机质、速效养分也均有一定的影响,其中沙打旺压青后对土壤有机质、土壤速效养分的提高最为明显,有机质提高了15.9%,速效氮提高了28.8%,尤其是沙打旺的富磷、富钾作用更为显著,压青后使土壤速效磷和速效钾分别提高了62.0%和78.4%,三种绿肥以沙打旺培肥效果最好,可作为与棉花间作或轮作倒茬的最佳绿肥。In this experiment three green manures including Melilotus suaveolens, V. viUosa Roth, and Astragalus adsurgens were used to study their biomass ,plant nutrient content and the effect of green manure application on soil nutrients in cotton fields. The results showed that biomass and plant nutrient content in the Melilotus suaveolens was the highest in three green manure;application of three green manure in the Green the cotton fields had a certain influence on soil organic matter, available nutrients; the effect of A. adsurgens was the most obvious ,organic matter increased by 15.9% ,and available nitrogen increased by 28.8% , especially the role of rich phosphorus and potassium in A. adsurgens was even more significant, after the application of green manure in the soil phosphorus and potassium were increased by 62.0% and 78.4%. Therefore A. adsurgens best performed in fertiliting soil , and could be used as the best green manure in intercropping and rotating or inverting in the cotton crop.

关 键 词：绿肥 生物量 养分含量 

分 类 号：S562.062[农业科学—作物学]