期刊论文

中文

作物研究

1001-5280

2004

18

3

137-140

10.16848/j.cnki.issn.1001-5280.2004.03.004

本校为第一机构

为探明免耕直播稻的生长规律和免耕直播的环境效应,研究了稻田免耕直播对土壤理化性状和水稻生长及产量形成的影响.结果表明,稻田免耕后,土壤容重降低和孔隙性得到改善,土壤养分在土壤表层富集.与翻耕直播相比,免耕直播稻分蘖能力较弱,但无效分蘖较少,成穗率高.直播条件下,免耕更有利于叶面积的扩展.除齐穗期外,其它生育时期免耕稻的根系活力强,平均比翻耕提高4.45%.在最高分蘖期,免耕直播稻的根冠比和单蔸根干重高于翻耕直播稻.在翻耕和免耕条件下,干物质积累量及在茎、叶和穗中的分配比例无显著差异.免耕直播稻的实际产量为8.6 t/hm2,比翻耕直播稻增产5.8%.另外,免耕直播稻的收获指数比翻耕直...

To ascertain the growth pattern of no tillage and direct seeding (NT-DS) rice and its environment effects, the impact of NT-DS on the soil characters and the growth and yield formation of rice were studied. The results showed that NT-DS reduced the soil bulk density and improved the void properties. It is beneficial to enrich the soil nutrient in the surface layer of soils. Compared with conventional tillage and direct seeding (CT-DS) rice, NT-DS rice displayed weaker tillering capability, less unproductive tiller number and higher productive t...