摘要
研究了水稻田节水保护性耕作栽培技术体系,即采用留茬带状分层旋耕、苗带全层施肥、免除水整地、润田后插秧为技术主体的水稻保护性耕作节水栽培技术的效果。结果显示该技术可以降低稻田土壤的容重,提高稻田土壤的孔隙度和氧化还原电位;由于实施了集中施肥,苗带土壤耕层速效氮、磷、钾含量也得到提高。稻田土壤理化性状的改善,促使水稻根系生长发育良好,从而使地上部表现出生长优势,提高水稻产量。从产量构成因素看,单位面积穗数和千粒重的提高最明显和普遍。
The soil and rice plant characteristics, and grain yield and its components of rice under water-saving and protective tillage （WSPT） conditions were analyzed. Compared with conventional tillage method, the soil bulk density were decreased, and soil porosity, redox potential, available N, P, K contents in the soil layers of seedling were increased, the root dry weight and leaf N content of rice were enhanced under WSPT. The yield under WSPT was attributed to the increase in number of panicles per unit area and 1000-grain weight.
出处
《中国水稻科学》
CAS
CSCD
北大核心
2005年第6期567-569,共3页
Chinese Journal of Rice Science
基金
黑龙江省科技攻关资助项目(GC04B305)。
关键词
水稻田
保护性耕作
土壤理化性状
产量
paddy field
protective tillage
soil characteristics
yield
