麦玉秸秆还田对土壤养分动态变化的影响  

Effect of wheat and maize straw returning on dynamic of soil nutrient

作　　者：王磊[1] 朱林[1] 陶少强[1] 李金才[2] 沈学善[2] 

机构地区：[1]安徽农业大学资源与环境学院,合肥230036 [2]安徽农业大学农学院,合肥230036

出　　处：《安徽农业大学学报》2010年第4期791-794,共4页Journal of Anhui Agricultural University

基　　金：国家科技支撑计划项目(2007BAD89B10);安徽省自然科学基金(090411026);安徽农业大学资助引进与稳定人才科研项目(wd2008-11)共同资助

摘　　要：通过定位试验在玉米秸秆全量粉碎还田及小麦秸秆旋耕施肥播种同步完成的前提下,研究秸秆还田循环利用条件下小麦玉米两熟制土壤养分特性的动态变化。结果表明,从玉米收获期至小麦成熟期,各处理的土壤全氮量有所降低,而土壤碱解氮在小麦整个生长发育时期呈现增加的趋势。小麦秸秆全量还田和玉米秸秆还田对稳定小麦生长前期(拔节期以前)的土壤有机质含量具有明显作用。秸秆还田对土壤速效磷含量的降低具有减缓作用。The orientation trails were conducted to study the effect of straw returning on dynamic of soil nutrients under maize straw full smash returning and wheat straw rotary tillage returning combined with synchronal fertilization application. The results showed that the soil total nitrogen contents of all treatments decreased in some degrees, but the content of available N took on trend of ascending during the growth of wheat under straw returning. It took an obvious role for maize straw full smash returning and wheat straw rotary tillage returning to stabilize the level of soil organic matter during the prophase of wheat growth （ before period of wheat jointing）. Straw returning took part in reducing decrease of available phosphorus of soil.

关 键 词：秸秆还田 土壤养分 生物学特性 动态变化 

分 类 号：S365[农业科学—作物栽培与耕作技术]