论文部分内容阅读
针对新疆盐碱地的改良特征 ,通过室内膜下滴灌土壤盐分运移试验 ,初步研究了土壤脱盐过程 ,滴头流量、灌水量等对脱盐过程的影响。结果表明 :膜下滴灌土壤盐分分布可划为达标脱盐区、未达标脱盐区及积盐区 3个区域 ;土壤含盐量分布具有水平脱盐距离大于垂直脱盐距离的特点 ;滴头流量、土壤初始含水量以及土壤初始含盐量的增加不利于达标脱盐区的形成 ;灌水量的增加有助于土壤脱盐。这些结果对膜下滴灌新技术开发利用盐碱地的生产实践具有指导意义。
According to the improved characteristics of saline-alkali land in Xinjiang, the effects of soil desalting process, drip flow rate and irrigation volume on the desalting process were preliminary studied through the soil salt migration test under drip irrigation. The results showed that the soil salinity distribution under drip irrigation under mulch can be divided into three areas: the standard desalination zone, the non-standard desalination zone and the salt accumulation zone. The soil salinity distribution has the characteristic that the horizontal desalination distance is greater than the vertical desalination distance. The dripper flow, The increase of water content and the initial soil salt content is not conducive to the formation of the standard desalination zone; the increase of irrigation volume is helpful to desalination of soil. These results are instructive for the production and application of new technology of drip irrigation under saline soil.