摘要
在新垦红壤旱地上，一次性施磷石膏１０ｔ／ｈｍ２和５ｔ／ｈｍ２，五茬作物收获后，取样分析土壤理化状况，结果表明：施磷石膏后，土壤理化性状得到改善，表现为土壤容重下降，总孔隙度、非毛管孔隙度增加，土壤团聚体破坏率降低，通透性和结构性增强。土壤中Ｃａ、Ｓ、Ｐ等营养元素含量增加，盐基交换量和盐基饱和度提高，土壤ｐＨ值上升。室内模拟培养试验结果与田间试验结果基本一致。
Phosphogypsum was fertilizered in a lump to newly reclaimed red earth dryland at the amount of 10 t/hm 2 and 5 t/hm 2. The physicochemical properties of soil were analysed after five crops having been harvested. The results demonstrated that the physicochemical properties of soil had been improved. The improved physica; properties included the decline of soil bulk density, the increase of total porosity and no-capillory porosity. the fall of degress of destroying to soil aggregate and enhanced air permeability and soil constitution, and the improved chemical propertites included the increase of soil nutrients such as Ca, Sand P, the raised base exchange capacity and base saturation percentage and hightened soil pH. The results obtained from indoor imitative culture experiment and field test had little difference.
出处
《江西农业学报》
CAS
1998年第2期59-65,共7页
Acta Agriculturae Jiangxi
关键词
红壤旱地
磷石膏
理化性状
土壤
施肥
Phosphogypsum
Red earth dryland
Improved physiochemical properties of soil
