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为更好地改良利用盐渍土,选择了耐盐能力较强的蓖麻为研究材料,探索了蓖麻对盐渍土的改良效果。研究结果表明,盐渍土脱盐是一个长期的过程,种植蓖麻使盐渍土脱盐一般需要3年以上。种植蓖麻3年的小区与盐渍土荒滩比较,0—20 cm土层土壤总孔隙度、团粒含量分别增加了12.82、18.33百分点,自然含水量、有机质、碱解N和速效P、K含量分别增加了102.42 g/kg、5.98 g/kg、8.16 mg/kg、6.56 mg/kg、10.99 mg/kg,而土壤容重、全盐含量、pH值分别降低0.34 g/cm3、2.26 g/kg、0.86,脱盐率达到51.95%,蓖麻子平均产量为5.40 t/hm2,折合产值1.35万元/hm2。
In order to improve the utilization of saline soils, castor has been selected as the research material to study the improvement effect of castor on saline soils. The results show that desalination of saline soil is a long-term process. It takes more than 3 years to plant salt-saline soil with castor. The total porosity and aggregate content of 0-20 cm soil layer increased by 12.82 and 18.33 percentage points respectively in the three-year community planted with castor, compared with saline soil, the natural water content, organic matter, alkaline hydrolysis N and available P and K The contents of soil bulk density, total salt content and pH decreased by 0.34 g / cm3 and 2.26 g / kg respectively, which were 102.42 g / kg, 5.98 g / kg, 8.16 mg / kg, 6.56 mg / kg and 10.99 mg / , 0.86, desalination rate reached 51.95%, castor bean average yield of 5.40 t / hm2, equivalent to the output value of 13,500 yuan / hm2.