不同灌溉方式对农田土壤性状和花生落果率的影响

于2014―2015年度麦茬花生生长季,设置移动式管灌、微喷带灌溉和不灌溉3种处理,研究了不同灌溉方式下农田土壤体积质量、土壤孔隙度、水稳定性土壤团聚体组成、花生产量和花生落果率的变化。结果表明,与移动式管灌处理相比,微喷带灌溉处理的土壤体积质量、粒径小于0.25 mm水稳定性土壤团聚体数量和花生落果率分别降低了7.6%、6.4%和66.8%,土壤孔隙度增加了8.4%,而2处理间花生产量没有显著差异。综合考虑花生产量,土壤物理性状和花生落果率的变化,微喷带灌溉是试验条件下能够降低花生收获难度的灌溉方式。

Impact of Irrigation Methods on Soil Physical Properties and Abscission of Peanut Seeds

This paper investigated the impact of different irrigation methods on soil density, soil porosity, aggre-gate stability, seed abscission and yield of peanuts in 2014—2015. Three methods:micro-spray irrigation, mobile-pipe irrigation and no irrigation were tested. The results revealed that compared with mobile-pipe irrigation, the micro-spray irrigation reduced soil density, stability of aggregates smaller than 0.25 mm, and abscission of seeds by 7.6%, 6.4%and 66.8%respectively, whereas the associated soil porosity increased by 8.4%. There was no sig-nificant difference between the yields of the two irrigations treatments. Considering the yield, the change in soil physical properties and the seed abscission rate, we feel that the micro-spray irrigation is beneficial to peanut har-vest in our experiment.