不同生育期水稻对盐碱地不同土层土壤理化性质的影响

摘要

In this study rice was planted in saline-alkali soil.Then we collected soil samples at 0 ～ 20 cm and 20 ～ 40 cm soil layers at the experimental site at the periods of original bare land,after transplanting,tillering stage,booting stage,and ripening stage.The different effects of rice growth on soil physical and chemical properties were analyzed which are pH,electrical conductivity,texture,organic matter,total nitrogen,available phosphorus,and potassium content of the saline alkali soil.The results showed that rice growth could alleviate soil salinity.The values of pH and electrical conductivity of 0 ～ 20 cm and 20 ～ 40 cm soil layers decreased at different periods of rice growth.The soil sand content decreased,while silt content increased significantly.The values of soil organic matter,total nitrogen,available phosphorus,and available potassium content also increased significantly.Generally,rice growth could effectively improve the texture of saline-alkali soil and ameliorate soil nutrient status.%通过在盐碱地种植水稻,采集试验田原裸地时期与插秧后、分蘖期、孕穗期、成熟期0 cm ～ 20 cm与20 cm ～ 40 cm土层土壤样品,比较分析了不同生育期水稻对盐碱地不同土层土壤pH、电导率、质地、有机质、全氮、有效磷及速效钾含量的影响.结果表明:种植水稻可缓解土壤盐渍化,在水稻各生育期0cm ～ 20 cm与20cm ～40cm土层土壤pH、电导率均有所降低,土壤中砂粒含量显著减少,粉粒含量显著增加;土壤有机质、全氮、有效磷、速效钾含量也显著提高.种植水稻可有效改良盐碱地土壤质地,改善土壤养分状况.