摘要
对江汉平原湖积型涝渍地土壤pH、CEC、EC、有机质、易氧化有机质、速效钾、速效磷和碱解氮等化学性质进行了测定。结果表明：湖积型涝渍地土壤pH多数在6．6～8．5之间，7．6～8．5的面积占71％，过酸过碱的极少；CEC平均为24．65cmol／100g，处于中等水平；土壤EC95％在0．10～O．39mS／cm之间，没有盐渍化的现象；有机质及碱解氮较非涝渍地高，但下降速度较快，平均年递减量分别为1．11g／kg和1．68mg／kg；土壤速效钾、速效磷含量中等，但分布极不均匀。因此，在养分含量较低的区域应重视有机物料和磷钾肥的施用。
The pH,CEC,EC,organic matter,oxidable organic matter,available potas- sium,phosphorus and alkali-decomposed nitrogen were determined from waterlogged soils in Jianghan Plain.Results showed that:(1)The major range of soil pH was from 6. 5 to 8.5,and the percentage of soil area with pH ranging from pH 7.5 to 8.5 was 71%, and the soil areas with pH ranging betwen 5.0 and pH 8.5 were very Litle.(2)The mean of CEC from investigated soil was 24.65 cmol/100 g,which was at middle nutrient level.(3)The percentage of soil EC ranging from 0.10 mS/cm to 0.39 mS/cm was 95% and the soil was not salinized.(4)The amount of soil organic matter and alkali-decom- posed nitrogen from the waterlogged soil were higher than non-waterlogged soil respera- tively,but the decrease rate per year were 1.11 g/kg and 1.68 mg/kg resperatively.(5) The amounts of soil available potassium and phosphorus were at medium level but the distribution of soil nutrients wasn't very uniform.Therefore,organic manure and phos- phorus and potassium fertilizers must be applied in the district of low soil fertility.
出处
《长江大学学报（自然科学版）》
CAS
2005年第8期12-15,共4页
Journal of Yangtze University(Natural Science Edition)
基金
湖北省"九五"重点攻关资助项目(962P0503-06)
湖北省教育厅资助项目(96A047)
开放基金资助项目(2003KFJJ03)
关键词
涝渍地土壤
化学性质
评价
江汉平原
waterlogged land soil
chemical characteristics
evaluation
Jianghan Plain
