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.
出处
《广西农业科学》
CSCD
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)
关键词
免耕栽培
稻田
土壤肥力
no-tillage eultivation
paddy field
soil fertility
