海涂土壤盐斑观测及大麦棉花耐盐性探讨

Observation on salt spets in coastal land and study on tolerance of barley and cotton to salt

作者于１９９２年对上虞市新围海涂土壤的盐斑中心及外围含盐状况和大麦、棉花的生长进行了观测。结果表明，以氯化钠为主的滨海盐土，心底土含盐量高。０～２０ｃｍ土壤盐分变化快，难以作为作物的耐盐指标。０～１００ｃｍ土壤含盐量相对稳定，大麦在０．２５％以下能正常生长，棉花在０．３％以下能正常生长，可作为制订种植计划时作物耐盐的土壤指标。

In 1992,Salt State of Centre and periphery of salt spots and growth of barley and cot-ton on newly enclosed coastal soils in Shangyu,Zhejiang province were surveyed.The results showed that,for coastal saline soils which had NaCl as a main component of salt,salt content in subsoil was higher than surface soil,salt content in 0～20 cm depth of soil was variable and might not be used as index of salt tolerance for crops. However,saIt content in 0～100 cm depth of soil was relatively stable,and when it was under 0.25%and 0.30%respectively, barley and cotton could grow normally. Those two values might be suggested as soil index of crop tolerance to salt for making plantation plan.