摘要
田间小区试验证明，围埝蓄集雨水洗盐和覆盖抑制蒸发返盐，可以降低土壤含盐量。在试验期间降水56．5mm的情况下，覆盖塑料膜的处理，土壤0—20cm的盐分由0．4％～1．0％下降到0．15％左右；覆盖秸秆处理，土壤0～20cm的盐分由0．95％下降到0．28％；二者的洗盐效果都很明显。覆膜种植田菁处理，0—20cm的盐分由0．74％下降到0．41％，田菁完成了生命周期，田菁是豆科植物可以培肥土壤，也可以起到植物残体覆盖，减少地表蒸发和减缓塑料膜老化的作用，是一个可以推广的滨海盐渍土改良模式。
The plot experiment in field showed that the salt content could be decreased in coastal saline soil through desalination by harvesting rainfall with reclamation dam and inhibiting resalinization by coverage. The precipitation was 56.5 mm during the experiment. The salinity of 0 - 20 cm of soil decreased from 0.4% - 1.0% to about 0.15% covered by plastic film, while that decreased from 0.95% to 0.28% covered by stalks. Their desahing effects were both obvious. Planting Sesbania cannabina could not only fertilize the soil, but also cover the soil, so the surface evaporation could be decreased and the retrogradation of plastic film could be slowed down. It provided a propagable method for ameliorating the coastal saline soil.
出处
《山东农业科学》
2010年第2期64-66,共3页
Shandong Agricultural Sciences
基金
山东省科技攻关计划项目(编号:2008GG10006013)
关键词
降水
改良
滨海盐渍土
Precipitation
Amelioration
Coastal saline soil
