干湿循环下植生固沙材料N、P、K素释放特征研究  

NPK release characteristics of plant-sand-fixing materials under dry-wet cycle condition

作　　者：曲烈[1] 杨久俊[1] 乐俐[1] 刘洪丽[1] 

机构地区：[1]天津市软土环境与工程特性重点实验室/天津城市建设学院材料科学与工程系,天津300384

出　　处：《干旱区资源与环境》2013年第1期171-174,共4页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(50772071;50972099);天津市高等教育科技发展基金计划项目(20110910)资助

摘　　要：采用沙柱法研究了不同干湿循环条件下水泥-土基植生固沙材料N、P、K素的释放特征。结果表明:加速干湿循环组N素累计淋出量初期较低和后期较高,N素中期出现较高的峰值与增加温度湿度有关;P、K素累计淋出量初期和后期均较低,中期淋出率峰值向后推移。P、K素初期和后期累计淋出量较低与土壤吸附固化作用有关。The NPK release characteristics of plant sand fixing materials under varies dry wet cycle c6ndi tion, using the sand column leaching method, was investigated. The results revealed that the N cumulative leac hing content at early period under speeded dry wet cycle condition is lower but one at late period is higher ;but at the medium term, with the higher temperature and humidity, the N leaching rate increases. The P and K cu mulative leaching contents are lower at early and late periods, and their medium term peak values are delayed. The phenomenona of the delayed peak values at the medium term and reducing the cumulative leaching content of P, K nutrients in soil are attributable to the higher effects of soil adsorption and solidification.

关 键 词：植生固沙材料 干湿循环 控释肥 吸水剂 N、P、K素释放特征 

分 类 号：S143.1[农业科学—肥料学]