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我场土壤为沼泽盐土和草甸盐土,粘性,块状结构或无结构,变化复杂,局部差异很大。有些地块表层(0-5厘米) 土壤含盐量达到1.7%以上,氯离子含量在1%以上;50厘米土层中全盐量达到0.57%,氯离子含量达到0.27%。像这样的条件,根据以往的经验,当地所有乡土树种都是难以成活的。为了解决提高造林成活率的问题,1975年我们选择了一块盐碱比较轻,地势较平的试验地(60亩),其中40亩用高床灌溉法造林,20亩不筑床或开沟造林作为对照。这块地60厘米以上土层含盐量
My field soil as marsh salt and meadow salt, sticky, block structure or no structure, changes are complex, local differences. In some plots, the salt content in the surface soil (0-5 cm) reaches more than 1.7% and the chloride ion content is above 1%. The total salt content in the 50 cm soil layer reaches 0.57% and the chloride ion content reaches 0.27%. Such conditions, based on past experience, all local native species are difficult to survive. In order to solve the problem of increasing the survival rate of afforestation, we chose a relatively saline-alkaline land (60 mu) in 1975, in which 40 mu were planted with high-bed irrigation and 20 mu Control. This area of 60 cm above the soil salt content