不同免耕栽培模式对稻田土壤肥力的影响  

Effects of different no-tillage cultivation modes on soil fertility of paddy field

作　　者：江泽普[1] 黄绍民[2] 韦广泼[1] 陈伯伦[3] 蒙炎成[1] 李振经[2] 

机构地区：[1]广西农科院土壤肥料研究所,南宁530007 [2]广西农科院水稻研究所,南宁530007 [3]广西农科院科技处,南宁530007

出　　处：《广西农业科学》2007年第1期65-67,共3页Guangxi Agricultural Sciences

基　　金：广西科学基金应用基础研究专项(桂科基0342027)

摘　　要：通过田间试验方法,以常规插秧为对照,研究免耕直播和免耕抛秧两种免耕栽培模式对土壤肥力的影响。结果表明:与常规插秧相比,免耕栽培能使稻田土壤腐殖质累积,改善腐殖质品质;>0.25mm团聚体含量增加,全氮、全磷和速效氮、速效磷养分含量都有所提高,稻田土壤肥力性状都有所改善。两种免耕栽培模式中,免耕直播在土壤腐殖质总量累积上不如免耕抛秧,但在腐殖质品质、>0.25mm大粒团聚体含量及全氮和速效氮、速效磷等养分含量上则优于免耕抛秧。The conventional transplanting of seedling was used as the control, a field experiment was conducted to study the effect of direct-seedings with no-tillage and seedling-broadcast with no-tillage cultivation on soil fertility of paddy field. The results showed that, soil humus of paddy field was cumulated and the quality of humus was improved in no-tillage cultivation as compared with conventional transplanting of seedlings; the percentage of aggregates in the size group of 〉 0.25 mm was increased in no-tillage cultivation, as well as the contents of the total N and P, available N and P, and the soil fertility characters were improved. In two no-tillage cultivation modes, direct-seedings with no-tillage was not as good as seedling-broadcast with no-tillage in total content of humus, but it was better in the humus quality, the percentage of aggregates in the size group of 〉 0. 25 mm and contents of the total N, available N and P.

关 键 词：免耕栽培 稻田 土壤肥力 

分 类 号：S511.061[农业科学—作物学]