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中国农学通报 ›› 2009, Vol. 25 ›› Issue (15): 0-.

所属专题： 水稻

• 农学 农业基础科学 •    下一篇

免耕对水稻根系生长及根际环境的影响Ⅲ　免耕对水稻根际pH和养分含量的影响

江立庚,周佳民,徐世宏   

  • 收稿日期:2009-04-20 修回日期:2009-05-06 出版日期:2009-08-05 发布日期:2009-08-05

Influence of no tillage on root growth and rhizosphere environment in rice Ⅲ　Influence of no tillage on pH and nutrient contents in rice root rhizosphere Jiang Ligeng1, Zhou Jiamin1, Xun Shihong1,2

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  • Received:2009-04-20 Revised:2009-05-06 Online:2009-08-05 Published:2009-08-05

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摘要： 【研究目的】探讨免耕对水稻根际pH值和养分含量的影响；【方法】以金优253为材料进行盆栽试验，测定水稻在免耕、常耕、分根栽培三种条件下其根际和非根际的pH值和养分含量；【结果】水稻根际pH值小于非根际土壤，免耕水稻或免耕侧水稻根际和非根际pH值的差值总是大于常耕水稻或常耕侧水稻。根际碱解氮和有效磷含量高于非根际土壤，其速效钾含量却低于非根际土壤。免耕水稻或免耕侧水稻根际的碱解氮含量比常耕水稻或常耕侧水稻的低，而其速效钾和有效磷含量比常耕水稻或常耕侧水稻的高。但是，根际与非根际的碱解氮、有效磷和速效钾含量的差值均表现为免耕水稻或免耕侧水稻小于常耕水稻或常耕侧水稻；【结论】免耕水稻根系活动强于常耕水稻。

关键词: 精准农业, 精准农业, 3S技术, 现状

Abstract: 【OBJECTIVE】This paper is aimed to discuss the influence of no tillage on pH value and nutrient contents in rice root rhizosphere;【METHOD】Pot experiments were conducted with Jinyou 253 as material to measure pH and nutrient contents in rice root rhizosphere and bulk soil under no tillage, conventional tillage and root separating cultivation;【RESULTS】The value of pH in root rhizosphere was less than that in bulk soil, and the differences of pH value between root rhizosphere and bulk soil in no tillage rice or the no tillage side of separating cultivation rice were greater than those in conventional tillage or the conventional side of separating cultivation rice; The available nitrogen and phosphorus contents in root rhizosphere were greater than those in bulk soil, while its content of the available potassium was lower. The available nitrogen content in no tillage rice or the no tillage side of separating cultivation rice were lower than those in conventional tillage or the conventional side of separating cultivation rice, but their available phosphorus and potassium contents were greater; However, the differences of all of available nitrogen, phosphorus and potassium between root rhizosphere and bulk soil in no tillage rice or the no tillage side of separating cultivation rice were less than those in conventional tillage or the conventional side of separating cultivation rice. 【CONCLUSION】Rice root acted more stronger under no tillage than under conventional tillage.