江西省农田土壤有效硫现状研究

采集了江西１６个县市９种主要母质的６０９个农田耕层土样进行了土壤有效硫含量测定。统计结果表明：平均值为２６．７１ｍｇ／ｋｇ，缺硫和潜在缺硫样点占３９．１０％。按地区分，以赣南、赣东北山区缺硫最严重，有效硫小于１２ｍｇ／ｋｇ的样点占２６．６０％～４４．７０％，其次是丘陵地区，有效硫小于１２ｍｇ／ｋｇ的样点占１０．００％～１９．００％。按母质分，母质中以石英岩、花岗岩发育的土壤最缺，约占５０％～６０％，其次是红砂岩、泥质岩，缺硫为３０％～４０％，这些是江西省急需施用硫肥的土壤。水稻土以黄砂泥田、麻砂泥田、红砂泥田、鳝泥田等土属缺硫面积最多，全省缺硫水稻土面积约为１０３．８万ｈｍ２，约占水稻土面积的３４％。

Current Situation of Available Sulphur Content in Cultivated Soils in Jiangxi Province

The available sulphur content of 609 soil samples, which were taken from 16 counties in Jiangxi Province and developed from nine main parent materials, were determined. The results demonstrated that available sulphur content of these soils averaged 26.71mg/kg and sulphur deficiency or latent S deficiency existed in 39.10% of the soil samples, and serious S defic oncy occurred in the mountain areas of southern and northeastern Jiangxi, the soil samples which contained less than 12mg/kg available sulphur accounted for 26.60%～44.70% of the total secondly in hilly land, S deficiency occurred mainly in soils developed from parent materials of granite and quartzite and made up 50.00%～60.00% of all samples and then in soils developed from red sandstone and pelite. S deficiency took place in 30.00～40.00% of the total. All of the soils, which had not efficient sulphur mentioned above were badly in need of sulphur application. As to paddy soils, S deficiency existed mainly in yellow sandy mud soil, Masa mud soil, red sandy mud soil and brow red mud soil and the area of S deficiency was 1 038 000 ha, accounted for 34% of the total puddy soils.