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针对干旱区葡萄园春季压盐问题,通过对漫灌和滴灌两种不同的压盐方式下土壤剖面不同深度电导率测定,研究比较了两种方式的压盐效果。结果表明,大水漫灌压盐效果显著,在灌水量1 500 m3/hm2时垂直压盐深度达100~120 cm。而滴灌方式压盐时,灌水量为600 m3/hm2即可以在以滴头为中心的水平半径200 cm、深度60 cm的半椭球状土体内形成盐分淡化区,从而满足葡萄生长需要。但要注意如果是长期的滴灌洗盐必然在田间形成条带状的盐分淡化区和集盐区。
Aiming at the problems of pressure salt in spring in arid area, this paper studied the conductivity of soil profiles at different depths by flood irrigation and drip irrigation. The results show that flood irrigation with salt water has a significant effect, and the depth of vertical pressure salt reaches 100 ~ 120 cm when the irrigation water reaches 1 500 m3 / hm2. In the case of drip irrigation, the amount of irrigation water is 600 m3 / hm2, and the desalination zone can be formed in semi-ellipsoid soil whose horizontal radius is 200 cm and depth is 60 cm. However, it should be noted that if the long-term drip irrigation salt inevitably form a strip of salt desalination and salt concentration in the field.