干旱地区农业研究2011，Vol.29Issue(5)：144-150,7.
干旱区膜下滴灌棉田土壤盐分运移及累积特征研究
Research on transport and accumulation characteristics of soit salinity of cotton field under film mulched drip irrigation in arid areas
摘要
Abstract
Experiments were conducted to study different drip rate, irrigated water amount, irrigation scheduling and irrigation years on the characteristics of the soil salinity transport and accumulation. The results showed that the smaller drip rate, the less soil salinity on the single infiltration section and interference infiltration section; With the increase of the drip rate, the soil salinity has a increasing tendency when further and further away from single infiltration section or interference infiltration section. Through comparison of the soil water content in the same wetness level, the soil salinity was bigger in the interference infiltration section than in the single infiltration section. At the same drip rate, the more the water drops, the deeper the soil salinity could move. High frequency of irrigation effectively reduced the salinity of root area, while the treatment of low frequency made a big change in salinity, and it showed a accumulating phenomenon at the growth period. When the quantity of drip irrigation increased from 3 300 to 3 900 and 4 500 mVhm2, the peak value of salinity moved deeper from 60 to 80 and 100 cm. With the long lasting of drip irrigation, the 0 ~ 100 cm soil salinity showed a increasing tendency. The accumulated layer of soil salt were moved to the topsoil, and the 0 ~ 100 cm salinity showed significant difference ( P < 0.05) between cotton fields with 6 ~ 7 a difference of drip irrigation lasting.关键词
滴头流量/湿润锋/土壤盐分/累积/膜下滴灌/滴灌年限Key words
drip rate/ wetted front/ soil salinity/ accumulation/ drip irrigation under the mulching/ years of irrigation lasting分类
农业科技引用本文复制引用
虎胆·吐马尔白,弋鹏飞,王一民,张金珠,吴争光..干旱区膜下滴灌棉田土壤盐分运移及累积特征研究[J].干旱地区农业研究,2011,29(5):144-150,7.基金项目
国家自然科学基金(51069015) （51069015）
新疆水利水电工程重点学科资助 （）
