沟垄作种植牧草改良重盐渍草地的效果及其水盐动态

Method, Effect and Water-salt Dynamics by Furrow-Ridge to Emprove High Salinized Grassland

本文作者研究了三种不同宽度沟垄作种植草木樨对草地改良的效果，其中沟／垄宽度比为100：50cm的效果最优。水盐动态的研究表明：在未灌溉条件下，垄的含盐量逐渐增加，沟的含盐量则逐渐减少，但是在六月初之后，受气温的影响沟内出现轻微返盐。在灌溉条件下，垄在灌溉后迅速积盐，尤其在0～5cm土层内积盐最多，并于5～7天达到峰值，之后积盐速度渐趋缓慢。沟内表层在灌溉后迅速脱盐，而下层含盐量有所上升，随后盐分向表层积累。三种处理的植被状况与原有植被相比发生了显著变化。

This paper is the author's further study on the effect and water-salt druamics using three treatments of furrow-ridge culture to improve high salinized desert grassland in two-year resarch. The result showed that ridge accumulated salt and furrow reduced it. In the three treatments, one of the furrow width of 100cm: ridge width of 50cm was the optimum for forage growth. The water-salt dynamics of this kind of furrow-ridge treatmeat was: during nonitrigation period, salt content of ridge accumulated gradually, while furrow salt content decreased to some degrees. But after June 4, the upper layer of furrow began to accumulate salt by the effect of temperature. During irrigation period, all layers of ridge accumulated salt after being irrigated, especially in 0~ 5cm layer, 5 ~7 days later, it would reach a higher content of salt, then, the changes became slower, Salt content of furrow rapidly reduced in 0 ~20cm layer after irrigation, but accumulated below 20cm of the soil, and then, salt moved to the surface of the soil. After treatment,vegetations were obviously changed compared with the original ones.