保水剂不同用量对土壤理化性状和木薯产量的影响  

Effects of different dosages of water-retaining agent on physical and chemical properties of soil and yield of cassava

作　　者：莫凡 罗兴录[2] 周红英[2] 黄秋凤[2] 杨鑫[2] 

机构地区：[1]南宁市灌溉试验站,南宁530000 [2]广西大学农学院,南宁530005

出　　处：《广西农业科学》2010年第5期459-462,共4页Guangxi Agricultural Sciences

基　　金：国家农业科技成果转化项目(2008GB2E100248);国家科技支撑计划项目(2007BAD75B02)

摘　　要：以木薯品种新选048为试材,进行保水剂不同用量对土壤理化性状及木薯产量的影响试验,探讨木薯施用保水剂的最佳用量及经济效益。结果表明:随着保水剂施用量的增加,土壤含水量增加,土壤毛管孔隙度、总孔隙度增大,土壤有机质、碱解氮、速效磷、速效钾含量增加。木薯施用保水剂后可达到增产、增收的效果,其最佳施用量为30kg/ha。The new cassava variety Xinxuan 048 was planted in field and different dosages （0, 30 and 60 kg/ha） of water-retaining agent （Jifengnonglin） were applied with 5 kg soil to 10 cm of root system of cassava after top-dressing, the effects on physical and chemical properties of soil and yield of cassava, were investigated at harvest. The soil water content, soil capillary porosity and total porosity increased with the increase in concentration of water-retaining agent, and the con- tent of soil organic matter, alkali hydrolysable nitrogen, available phosphorus and available potassium also increased. Applying water-retaining agent also resulted in higher yield and benefit of cassava. Water retaining agent was found to be the best when applied @30 kg/ha.

关 键 词：保水剂 土壤理化性状 木薯 产量 

分 类 号：S153[农业科学—土壤学] S533.06[农业科学—农业基础科学]