种草改良江苏滨海盐土效果的研究

The Effects of Forage Planting on the Improvement of Coastal Saline Soil in JiangsuProvince

为寻求江苏滨海盐土改良的最佳途径，１９９０～１９９１年在竹港垦区进行了种草改土研究。结果表明，土壤有关性状种草比不种草有显著改善。种草第四年表层土（０～５ｃｍ）盐分下降０．２％（绝对值，下同），土壤容重下降０．１３～０．２５ｇ／ｃｍ３，孔隙率增加５～８％，耕作层增厚５～７ｃｍ，＞０．２５ｍｍ国聚体增加１０～２０％，有机质增加０．３％，全氮增加０．０３％，微生物总数增加３～１４倍，生物活性显著提高。

To search for the best way of the improvement of coastal saline soil in Jiangsn province,the researcheson the improvement of the soil by forage planting were made in ZhuGangreclaimation area form l990 to l993, with the method of compared soil properties inforage planting with in not doing. The results showed that the formenr had more improvement than the latter. In the 4th year of planting,salt in the surface soil(0～5cm)decreased 0.2%(absolute value, similarly hereinafter),unit weight of soil de-creased 0.13～0.25g/cm3,the small opening rate increased 5～8%,arable layer did 5～ 7cm,soil granule(>0.25mm)did l0～20%,the substance in soil did 0.3%,all ni-trogen did 0. 03%,amout of microorganism did 3～14 times, and organism reactivitywas strikingly increased.