不同种植方式对草木樨滴灌土壤水盐运移的研究

基于大田试验,以耐盐碱牧草草木樨为试验材料,分析了以每3 d E20蒸发皿水面蒸发量的50%为灌溉指标,耕作种植方式为平作和垄作下,盐碱地滴灌土壤剖面(距滴头横向30 cm,滴头垂直深度100 cm)含水率、电导率和p H值的变化特征。结果表明:灌溉结束后,垄作种植方式的电导率和p H值都比平作下降得比较明显,其中,垄作和平作种植方式滴头下方0~60 cm的平均电导率比灌前下降37.4%和21.8%,垄作在0~40 cm淋洗的效果较明显,较灌溉前0~40 cm土层平均电导率下降52.4%,平作在0~20 cm淋洗的效果较明显,较灌溉前0~20 cm平均电导率下降30.8%。

Effects of Different Planting Modes on Soil Water and Salt Transfer of Sweet Clover Under Drip Irrigation Conditions

In the field trials, the saline-alkaline tolerance sweet clover is selected as experiment materials, the change characteristic of water content, EC and pH of the soil profile (30 cm in horizontal direction and 100 cm in vertical direction) under drip irrigation under the cultivation patterns of flat planting and ridged planting with 50% of the surface evaporation amount of E20 evaporation pan per 3 days as irrigation index, is analyzed.The results show that EC and pH of ridged planting cultivation pattern are fallen more obviously than flat planting;the average EC in the layer of 0~60 cm under dropper declines by 37.4% and 21.8%, respectively, for ridged planting and flat planting than that before irrigation;ridged planting pattern has obvious leaching effect on the layer of 0~40 cm under dropper, the average EC declines by 52.4% than that before irrigation;flat planting pattern has obvious leaching effect in the layer of under 0~20 cm dropper, the average EC declines by 30.8% than that before irrigation.