摘要
以宁夏环香山地区农田压砂地为研究对象,对压砂不同种植年限(CK,1a,3a,5a,15a,25a)下的土壤肥力及其相关因子进行了研究。结果表明:农田压砂后能显著提高土壤贮水量,压砂不同种植年限下的土壤贮水量分别比农田CK提高了68.5%,50.12%,40.42%,60.03%,44.39%。受季节降雨的影响,压砂不同种植年限土壤贮水量的季节变化趋势相一致。农田压砂种植初期(1～5a)显著降低了pH值,随着种植年限的增加PH值含量基本呈增加趋势。农田压砂后明显降低了土壤全氮、全磷、有机质、碱解氮、速磷、速钾的含量,且随着种植年限的增加呈逐年下降的趋势。随着种植年限的增加西瓜产量呈明显下降趋势,农田压砂种植5～8a,10a,15a,20a分别比压砂种植1～3a产量下降了33.33%,38.89%,55.56%,71.11%。
This paper was studied on the soil fertility and correlation factor of gravel-mulched land with different years （CK,1 a,3 a,5 a,10 a,15 a,25 a） around Xiangshan mountain.The results showed that graveled on the farmland can significantly increase the soil water storage.The soil water storage of gravel-mulched land with different years were superior to the control increased by 68.5%,50.12%,40.42%,60.03%,44.39%,respectively.By the effect of rainfall,the seasonal variations of soil water storage were almost same in grave-mulched lands with different years.Soil pH value was decreased in gravel-mulched land with initial stage （1～5 a）,but showed a rising trend with the increasing of graveled period.The contents of total nitrogen,total phosphorus,organic matter,available nitrogen,available phosphorus and available potassium were all decreased significantly with the increasing of graveled period.The watermelon production showed a decreasing trend,and decreased by 33.33%,38.89%,55.56%,71.11% in different years （5～8 a,10 a,15 a and 20 a） contrast with that in 1～3 a gravel-mulched land.
出处
《水土保持学报》
CSCD
北大核心
2010年第2期201-204,共4页
Journal of Soil and Water Conservation
基金
国家"十一五"科技支撑计划项目(2007BAD54B05)
宁夏自然基金项目(NZ0856)
关键词
压砂田
土壤贮水量
土壤肥力
gravel-mulched land
soil water storage
soil fertility
