冬水田水旱复种连续免耕的效益及土壤肥力和杂草动态研究  

STUDIES ON SOIL FERTILITIES,WEEDS CHANGES AND EFFECTS OF WATER ARID SEQUENTIAL CROPPING PATTERNS IN CONTINUING NON TILLED WINTER PADDY

作　　者：王光明[1] 胡声荣[1] 郑钦玉[1] 石孝均[1] 朱自均[1] 胡长青 张健[1] 陈贵林[1] 

机构地区：[1]西南农业大学,万县市农科所

出　　处：《西南农业大学学报（自然科学版）》1995年第4期344-347,共4页Journal of Southwest Agricultural University

基　　金：四川省科委应用基础研究资助

摘　　要：对冬水田水旱复种连续免耕的研究表明，免耕垄作稻比常规平作稻增产，免耕２～３年比１年的水稻增产６．８％～１６．２％，免耕种植绿肥、蔬菜、油菜后的垄作稻产量较高。经济效益依次为蔬菜、油菜、大麦、小麦和绿肥。连续免耕土壤有机质含量明显下降，速效氮、磷、钾逐年提高。免耕１年杂草较少，第２年大发生，其后趋于稳定。Experiments with five water arid sequential cropping patterns on continuing non tilled winter paddy were conducted. The results indicated that the rice yield in ridge cul-ture was higher than that in flat culture. The rice yield in continuing non tillage for 2 3 years increased by 6.8%～16.2%as cnmpared with that in non tillage for 1 year.Ofthese patterns. The rice yield in ridge ctilture after cultivating green manure crops or rape,and/or vegetable was the highest. Five autum planting crops in continuing non tillage for3 years prodticed relatively high yields, and the order of economic profits of the five cropswas vegetable>rape>barley>wheat>green manure crops. The conteiits of organic mate-nals in soil with continuing non tillage for 3 years decreased significantly, but the quanti-ties of N, P and K in soil increased each year.Weeds in the fields with non tillage in thefirst vear were little,but in the secoid year, the occurrence of weeds in the fields trendedto stability.

关 键 词：耕作土壤 免耕 土壤肥力 土壤成分 

分 类 号：S158.3[农业科学—土壤学] S345[农业科学—农业基础科学]