北疆膜下滴灌棉田生育期土壤水盐的变化特征

针对北疆地区土壤盐化制约农业发展的问题,通过野外实地分层采集土样,分析北疆地区长期膜下滴灌农田种植前后土壤水分和盐分分布特征。统计学分析表明,种植期土壤含水量变异属于中等偏弱变异强度,土壤盐分的变异属于中等偏强变异程度,土壤盐分分布成自上而下先增大再减少的波动趋势。在空间分布上,土壤水分和盐分种植前后存在明显的差异,种植后在浅层土壤水分和盐分的含量成西高东低的变化分布。

Variation Characteristic of Soil Moisture and Salinity during Planting Period of Cotton Field under Drip Irrigation in Northern Xinjiang

Aiming at the problem that the soil salinization restricts the agriculture development of northern Xinjiang, through collecting the field soil sample of different layers, the soil moisture and salinity distribution characteristic of farmland under drip irrigation under mulch be-fore and after planting is analyzed in this paper.The statistics analysis result shows that the variability of soil moisture is medium weak, while the variability of soil salinity is medium strong.The distribution of soil salinity shows the tendency of increasing first and then decreasing from upper layer to lower layer.For spatial distribution, the soil moisture and salinity vary obviously before and after planting.After planting, the distribution of the soil moisture and salinity of shallow layer show shows the laws of higher in the western area while lower in the eastern area.