摘要
通过对江苏省 36个蚕种场的 875个土样的速效钾和缓效钾的测定分析 ,以及部分土样的电超滤钾分析认为 :各地区上层土壤 (0～ 2 0cm)的供钾能力大于下层土壤 (2 0～ 40cm) ;江苏省所有地区桑园均为缺钾土壤 ;太湖地区、宁镇扬丘陵地区的供钾能力 >江淮地区 >淮北地区 ;淮北地区的土壤钾素缓冲能力较小 ,且其固定钾能力较强 ,说明全省桑园均要加强钾肥的施用 ,尤其是江淮和淮北地区 ;化学分析。
In this paper,the rapidly available K and the slowly available K contents of 875 soil samples from 36 silkworm eggs production farms in Jiangsu Province are analysed and some samples by EUF K(electro ultrafiltration) analysis.The main results are as follows:The K supplying power of upper layer(0～20cm)is stronger than that of lower layer(20～40cm),the order of K supplying power of different region is as follows:The Taihu Lake area and Ning Zhen Yang hilly area>the Jianghuai area>the north of Huai River area,the buffer power of soil K in the north of Huai River area in Jiangsu is lower than that of the others whereas its K fixing power of soil is stonger than that of the others.The K supplying power of all area soil in Jiangsu Province is poor,so we should add potasium fertilizer.Chemical analysis and plant experiments proved that the K supplying power of soil can be determined by EUF.
出处
《蚕业科学》
CAS
CSCD
2001年第3期220-223,共4页
ACTA SERICOLOGICA SINICA
