免耕覆草旱作条件下水稻的生长特性  

Growth Characteristics and Yield of Late-Season Rice under No-tillage and Non-Flooded Cultivation with Straw Mulching

作　　者：王栋[1] 李大明[1] 李辉信[1] 秦江涛[1,2] 胡锋[1] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095 [2]中国科学院南京土壤研究所,江苏南京210008

出　　处：《中国水稻科学》2009年第5期517-522,共6页Chinese Journal of Rice Science

基　　金：国家863计划资助项目(2002AA2Z4331)

摘　　要：通过田间定位试验,研究了免耕覆草旱作、免耕裸地旱作和免耕水作3种栽培方式对晚稻生长状况和产量的影响。结果表明,免耕覆草旱作水稻产量与免耕水作差异不大,但两者明显高于免耕裸地旱作。与免耕裸地旱作相比,免耕覆草旱作明显提高水稻的有效穗数和每穴总粒数。免耕覆草旱作水稻可获得与免耕水作相当的地上部干物质量。与免耕水作相比,免耕旱作显著降低抽穗期水稻功能叶叶面积。与免耕裸地旱作相比,免耕覆草旱作明显提高灌浆期水稻总根长和根数。A long-term field experiment （started at 2003） was conducted to determine the effects of different rice cultivation methods on growth characteristics and yield of late season rice under double-rice cropping syslem in seasonal drought re gion of southeast China （Yujiang County, Jiangxi Province）. The rice cultivation included no tillage and non-flooded rice cultivation with straw mulching （N SM）, no-tillage and non flooded rice cultivation without straw mulching （ N-ZM）, and notillage and flooded rice cultivation （N-F）. The results obtained in 2007 showed that there was no significant difference in rice grain yield between N-SM and N-F treatments, However, the rice grain yields under N-SM and N F treatments were significantly higher than that under N ZM treatment, respectively. The effective panicle number and total grain number per hill of rice were significantly higher under N SM treatment than under N-ZM treatment. The above ground dry matter of rice in N- SM treatment was similar with that in N-F treatment. Compared to N-F treatment, N-ZM and N-SM treatments significantly decreased the leaf area at the heading stage. Compared with N-ZM treatment, N SM treatment could significantly increase total length and number of roots at the grain-filling stage.

关 键 词：水稻 免耕 旱作 秸秆覆盖 生长发育 产量 

分 类 号：S511[农业科学—作物学]