秸秆层隔治盐研究

研究了20 cm土壤埋入不同秸秆层隔治盐碱的效果。结果表明,不同秸秆层隔0～20 cm土层中的盐分含量均低于对照,且随层隔数量增加而减少。以层隔2.0 kg/m2的效果最佳,与对照相比,0～20 cm土层盐分含量降低0.12%,土壤有机质增加0.8 g/kg,大豆增产29.67%。说明秸秆层隔可以阻断下层土壤盐分随毛管水的上升,降低上层土壤盐分含量,而且兼备秸秆还田功效,增加了土壤有机质含量,改善了作物生长条件,提高了作物产量。

Effect of the Straw Layer Partition on Improving Salinity-Alkalinity Land

The different straws were embeded into at 20 cm soil layer to study the effect of straw layer partition on improving salinity-alkalinity land. The salinity contents in 0 - 20 cm soil layer was with different straw layer partition amount were all lower than CK and decreased with the increase of layer partition amount. The straw layer partition at 2.0 kg/m^2 got the optimum effect, in which, compared with CK, the salinity contents in 0 - 20 cm soil layer was reduced by 0.12%, the soil organic matter was increased by 0.8 g/kg,indicating that the straw layer partition could interdict the rise of lower layer soil salinity along with capillary water and decreased the salinity contents in upper soil. The straw layer partition had the function of crop straw to soil, enhanced the soil organic matter content , improved crop growth condition and increased crop yield.