间作小麦根际和土体磷养分的动态变化  

Dynamics of Available Phosphorus in Rhizosphere and Bulk Soil of Wheat under Intercropping

作　　者：王宇蕴[1] 任家兵[1] 郑毅[1,2] 汤利[1] 

机构地区：[1]云南农业大学资源与环境学院,云南昆明650201 [2]西南林业大学,云南昆明650224

出　　处：《云南农业大学学报（自然科学版）》2011年第6期851-855,共5页Journal of Yunnan Agricultural University:Natural Science

基　　金：国家自然科学基金项目(30860157);国家"973"计划科研专项基金(2011CB100405;2008CB117011);公益性行业(农业)科研专项基金(201103003)

摘　　要：通过田间试验,研究比较了小麦与蚕豆间作和小麦单作环境条件下,小麦根际和土体速效磷养分的动态变化,探讨了小麦单作和小麦与蚕豆间作对小麦根际磷养分的影响。结果表明,单作小麦和间作小麦根际速效磷含量在各生育期呈先升高后降低的变化趋势,土体速效磷含量单作小麦在灌浆期最高,间作小麦在抽穗期最高。小麦蚕豆间作提高了拔节至灌浆期小麦根际速效磷含量,显著降低了成熟期根际速效磷含量和土体磷含量。拔节期、抽穗期、灌浆期小麦根际速效磷含量分别提高了6.81%,8.71%,12.95%,成熟期根际速效磷含量降低了21.11%。Through field experiment, we studied the dynamics change of phosphorus in rhizosphere and bulk soil under wheat and faba bean intercropping and wheat monocuhure, and the effects rhi- zosphere and bulk soil phosphorus under wheat and faba bean intercropping and wheat monocul- ture. The results showed that there was consistency in each growth date of rhizosphere soil phos- phorus under wheat intercropping and monocuhure, the bulk soil phosphorus content was highest in filling under wheat monoculture, and reached the highest in tilling under wheat intercropping. In wheat and faba bean intercropping, the rhizosphere soil phosphorus content of wheat was in- creasing from tilling stage to filling stage, and the rhizosphere and bulk soil phosphorus content in maturity was dramatically bringing down. The rhizosphere soil phosphorus contents of wheat in- creased by 6.81% , 8.71% and 12.95 % in jointing, tilling and filling stages, respectively, and reduced by 21. 11% in maturity stage.

关 键 词：小麦 间作 根际 土体 速效磷 

分 类 号：S158.3[农业科学—土壤学]