不同磷源在碱性土壤中的淋溶特征研究  

Leaching Characteristics of Different Phosphorus Sources in Alkaline Soils

作　　者：余凯凯 裴海荣 郭景丽 李圣君 YU Kaikai;PEI Hairong;GUO Jingli;LI Shengjun(Henan Xinlianxin Chemicals Group Co.,Ltd.,Xinxiang,Henan 453731,China)

机构地区：[1]河南心连心化学工业集团股份有限公司,河南新乡453731

出　　处：《肥料与健康》2021年第4期25-28,共4页Fertilizer & Health

摘　　要：为考察不同磷源施入碱性土壤中磷的利用效率,采用室内土柱进行了磷酸氢二铵(DAP)、磷酸二氢铵(MAP)、磷酸二氢钾(MKP)、磷酸脲(UP)等4种磷源在富磷和贫磷碱性土壤中的淋溶试验。结果表明:在富磷碱性土壤中,4种磷源的淋洗液中有效磷含量均随着淋溶次数的增加先升高后降低,磷的表观淋出率由大至小依次为DAP、MAP、MKP、UP;在贫磷碱性土壤中,4种磷源的淋洗液中有效磷含量均随着淋溶次数的增加而增加,磷的表观淋出率由大至小依次为UP、MAP、MKP、DAP。In order to explore the phosphorus utilization efficiency of different phosphorus sources applied to alkaline soil,four phosphorus sources,namely diammonium hydrogen phosphate(DAP),ammonium dihydrogen phosphate(MAP),potassium dihydrogen phosphate(MKP)and urea phosphate(UP)are used to carry out the leaching experiments in rich and poor phosphorus alkaline soil.The results show that in phosphorus-rich alkaline soil,the content of available phosphorus in the leaching solution of four phosphorus sources increased first and then decreased with the increase of leaching times.The apparent leaching rate of phosphorus is DAP,MAP,MKP and UP from high to low.In the phosphorus-poor alkaline soil,the contents of available phosphorus in the leaching solution of four phosphorus sources increased with the increase of leaching times and the apparent leaching rate of phosphorus from high to low is UP,MAP,MKP and DAP.

关 键 词：富磷碱性土壤 贫磷碱性土壤 磷源 磷酸氢二铵 磷酸二氢铵 磷酸二氢钾 磷酸脲 淋溶试验 

分 类 号：S158[农业科学—土壤学]