摘要
云南干热河谷区咖啡园咖啡植株发生黄化症,通过采集咖啡叶片和咖啡园土壤进行营养诊断,结果表明,发生黄化症的咖啡园土壤碳酸钙含量和土壤pH值分别比生长正常的咖啡园高70.89g/kg和1.51。与正常植株相比,发病的咖啡植株叶片叶绿素含量降低1.24mg/g,钾含量增高12.16g/kg,钙含量增高5.62g/kg,镁含量降低1.40g/kg。相关分析表明,土壤碳酸钙含量与土壤pH值、叶片钾含量、叶片钙含量达显著相关,与叶片叶绿素含量和镁含量之间均达极显著负相关。由此表明,土壤碳酸钙含量过高是导致咖啡植株黄化症发生的主要原因。灌溉和增施有机肥是防治咖啡植株黄化症的有效措施。
Leaf yellowing disease occurs in coffee plants in Ganre (dry and hot) valley area of Yunnan. The nutrition of coffee leaves and the soil of the coffee plantation was detected and diagnosed. The results showed that the calcium carbonate content and pH of the soil in the coffee plantation where coffee plants suffered leaf yellowing disease were 70.89 g/kg and 1.51 higher than those of the normal plantations. As compared with the normal plants,the chlorophyll content of the leaves of the diseased plants was de...
出处
《热带农业科学》
2009年第1期8-11,共4页
Chinese Journal of Tropical Agriculture
基金
云南省财政厅热带经济作物研究专项"咖啡种质资源保存圃建设与品种适应性调查"
关键词
干热河谷
咖啡
黄化症
营养诊断
云南
Ganre （dry and hot） valley
coffee
yellowing disease
nutritional diagnosis
Yunnan
