不同耕作方式对水稻经济性状的影响
不同耕作方式对水稻经济性状的影响
摘要：采用稻草还田免耕直播、稻草还田翻耕直播、非稻草还田免耕直播和非稻草还田翻耕直播4种耕作方式，探讨其对水稻经济性状的影响。结果表明，水稻免耕直播比翻耕直播能极显著提高结实率，显著增加穗粒数和着粒密度，从而显著提高水稻产量。稻草还田比非稻草还田也能显著提高水稻的结实率。但两者对水稻有效穗、株高、穗长、千粒重等性状没有影响。
关键词：水稻；稻草还田；免耕直播；经济性状
Effects of Different Plowing Methods on Economic Characters of Rice
Abstract ： Four different plowing methods ， straw returning to field and plowing-free and direct sowing ， straw returning to field and normal plowing and direct sowing， non straw returning to field and plowing-free and direct sowing， non straw returning to field and normal plowing and direct sowing ， were used in this paper to explore their effect on economic properties. The result indicated that the treat with straw returning to field and plowing-free and direct sowing was the best of four treats ， for its devote to rice yield by increasing the seed rate and seed number. It was not very effective on the ear number of rice， plant height， ear length， weight of 1000 grain and so on.
Key words：rice(Oryza sativa.L)；plowing method； straw returning to field；plowing-free and direct sowing；economic character
免耕栽培模式主要有免耕直播和免耕抛秧，关于水稻免耕直播或免耕抛秧的研究已有大量的报道[1-7]，但免耕栽培与稻草还田相结合及其对水稻产量及构成因素影响方面的研究则不多。本文探讨了水稻免耕直播与传统耕作方式对水稻产量及其构成因素的影响，旨在为水稻免耕直播技术的进一步推广提供参考依据。
1材料与方法
1.1试验地点及品种
晚稻试验于2004年在贵港市港北区庆丰镇高桥村高坡1队梁松和的责任田进行。试验田为壤土，肥力中等，前作为早稻。供试品种为秋优1025。