灌溉定额和灌溉水矿化度对土壤水盐动态影响研究

在甘肃省石羊河流域开展春玉米咸水灌溉田间试验，通过测定土壤含水量和含盐量，研究了灌溉定额和灌溉水矿化度对土壤水盐动态的影响。研究结果表明：灌溉定额与灌溉水矿化度均对土壤水分影响明显，随着灌溉定额和灌溉水矿化度的增加，土壤含水率越大；灌溉定额与灌溉水矿化度均对土壤盐分影响明显，土壤盐分累积量随着灌溉定额和灌溉水矿化度的增加而增大；收获后与播种前相比，0-100 cm土层，除淡水充分灌溉处理脱盐外，其余各灌溉处理均呈现积盐，并且随着灌溉水矿化度的增大，盐分累积量也越大，其中灌溉水矿化度为6 g/L的轻度缺水灌溉处理积盐量最大，最大值为0.838 g/kg。

英文摘要:

A field experiment was conducted under saline water irrigation with spring maize in Shiyang River basin of Gansu province. The soil water content and salt content were measured for study the effects of irrigation norm and salinity on soil water salt dynamic. The research results showed that irrigation norm and irrigation salinity both had obvious effect on soil water content. With the increase of irrigation norm and irrigation salinity, soil water content gradually increased. Irrigation norm and irrigation salinity also both had obvious effect on soil salt content. With the increase of irrigation norm and irrigation salinity, soil salt accumulation increased. After the spring maize harvest in comparison to sowing, the soil salt of every irrigation treatments was accumulated in addition to the fresh sufficient irrigation treatments in 0-100 cm. With the increase of irrigation salinity, soil salt accumulation increased. The 6 g/L deficit irrigation treatment had the largest salt accumulation and the maximum value was 0.838 g/kg.

查看全文查看/发表评论下载PDF阅读器

关闭