石灰性土壤桑树黄化病的成因及防治对策  

Occurrence causes of chlorotic disease of mulberry and its strategies for prevention in limestone soil

作　　者：陈桂芬[1] 黄玉溢[1] 刘斌[1] 

机构地区：[1]广西农业科学院土壤肥料研究所,南宁530007

出　　处：《广西农业科学》2008年第6期788-791,共4页Guangxi Agricultural Sciences

基　　金：广西自然科学基金项目(桂科自0542029)和(桂科自0728067)

摘　　要：通过对石灰性土壤地区的桑园调查和室内化验分析,结果表明,石灰性土壤桑树黄化病主要是缺铁引起的,由于土壤有效铁含量较低(DTPA-Fe≤13mg/kg),或是因土壤中交换性Ca和HCO3-浓度过高,使土壤铁的有效性降低,桑树表现缺铁症状。通过合理施肥、种植铁高效基因型的桑树品种和改善土壤通气条件,可以有效地防治桑树黄化病。Through the investigation of mulberry soil and lab analysis in Karst area, it showed that the occurrence of chlorotic disease of mulberry was caused by lack of iron in soil, which was aroused by either the lower available Fe （DTPA-Fe≤13mg/kg） or the higher exchangeable Ca and HCO3^- which made the available Fe lower. The chlorotic disease could be controlled effectively by reasonable application of fertilizers, planting a variety of mulberry of higher iron efficiency and improving the aerating condition of soil.

关 键 词：石灰性土壤 桑树 黄化病 防治对策 

分 类 号：S158.3[农业科学—土壤学]