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中国农学通报 ›› 2009, Vol. 25 ›› Issue (13): 70-73.

所属专题: 水稻

• 农学 农业基础科学 • 上一篇    下一篇

免耕对水稻根系生长及根际环境的影响——Ⅰ免耕对水稻干物质生产及产量的影响

徐世宏,周佳民,江立庚   

  • 收稿日期:2009-04-13 修回日期:2009-04-27 出版日期:2009-07-05 发布日期:2009-07-05

Influence of no tillage on root growth and rhizosphere environment in rice ⅠInfluence of no tillage on dry matter production and grain yield in rice

Xu Shihong,,, Zhou Jiamin, Jiang Ligeng   

  • Received:2009-04-13 Revised:2009-04-27 Online:2009-07-05 Published:2009-07-05

摘要: 以金优253为材料进行盆栽试验,比较水稻在免耕、常耕、分根栽培三种栽培条件下水稻干物质生产量和产量的差异。结果表明,分根栽培条件下,免耕侧根系干重在早季和晚季均比常耕侧极显著的低。在单一耕作方式下,免耕水稻地上部和根系干重均比常耕水稻低,根冠比和产量比常耕水稻的高,其差异多数情况下不显著。综合分析,免耕对水稻根系生长有明显的影响,但通过地上部与根系生长的协调作用,使根冠比增加,并使产量呈增加趋势。

关键词: 城市森林, 城市森林, 杨树片林, 降温效应, 增湿效应, 生态场, 时空格局

Abstract: Pot experiments were conducted in the early and late seasons of 2007 to compare the differences of dry matter production and grain yield in rice under no tillage, conventional tillage and root separating cultivation conditions. Results showed that rice indicated highly significantly lower dry root weight on the side of no tillage in both seasons under root separating cultivation condition. However, under the condition of single tillage pattern, rice indicated lower plant dry weight and dry root weight, greater ratio of dry root weight to dry plant weight and greater grain yield under no tillage condition, and the differences were not significant at most situations. It was inferred that no tillage made an obvious influence on rice root growth, but rice could get more grain yield by the harmony action between root and plant and the increased ratio of dry root weight to dry plant.