中国科学院南京土壤研究所可利用土壤改良剂——聚乙烯醇,对江苏铜山县张集公社孟庄大队的砂板性水稻土进行了盆栽和小面积改良的田间试验,获得较好效果。砂板土施用聚乙烯醇后土壤水稳性团粒显著提高,还降低了容重,增加了空隙度,促进了水稻的分蘖。与不施改良剂的土壤比较,产量提高43.5％;与翻压苕子的土壤比较增产21.9％。 Nanjing Institute of Soil Science, Chinese Academy of Sciences can use soil improver - polyvinyl alcohol, to conduct a pot experiment and small-area improvement experiments on the sand-paddy paddy soil of Mengzhuang Brigade, Zhangji Commune, Tongji County, Jiangsu Province, and obtain good results. The soil water-stable aggregates increased remarkably after applying polyvinyl alcohol in the sand and soil, also reduced the bulk density, increased the porosity and promoted the tillering of rice. Compared with the soil without amendment, the yield increased by 43.5% and 21.9% compared with that of the turnip prickly heat.