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通过田间试验,研究了沧州临港经济技术开发覆盖对滨海盐碱土水盐运动和刺槐生长的影响。结果表明:覆盖可以有效的保持刺槐林下地表和根系层土壤水分,减少盐分积累,并缓解水盐运动剧烈变化;地膜覆盖在根系层的保持水分和防止盐分积累的作用明显;玉米秸秆覆盖能拦蓄雨水和减少地表蒸发,抑制地表返盐、促进降雨淋盐的作用;在春季,沙子覆盖的表层土壤脱盐率高于其它两种覆盖;覆盖对刺槐的冠幅、当年枝生长有一定作用,但影响不显著,对地径生长的影响不明显。
The field experiment was conducted to study the effects of economic and technological development coverage of Cangzhou Harbor on the water and salt movement and the growth of Robinia pseudoacacia in coastal saline-alkali soil. The results showed that mulching could effectively maintain the soil moisture in the surface and root layers of Robinia pseudoacacia forest, reduce the salt accumulation and alleviate the drastic changes of water and salt movement. The mulching film could maintain the water content and prevent salt accumulation obviously in the root layer. In the spring, the desalination rate of topsoil covered by sand was higher than that of the other two kinds of coverage; the coverage of the crown of black locust had a certain effect on the growth of branches at that time, But the effect is not significant, the impact on the growth of the ground is not obvious.