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近年枣树苦痘病发生越来越严重,枣农使用许多常规方法都难以控制其危害,发生了苦痘病年年防、年年感病的情况。笔者经过分析认为,该病非病原菌侵染所致,而是由于枣缺钙造成的。一、枣苦痘病的成因1.土壤中有效钙供应不足有效钙是土壤溶液中和被土壤胶体吸附的离子。一般土壤中有效钙含量很少,仅为几十至几百微克1千克。钙在土壤中多以碳酸钙、含钙磷灰石等难溶性矿物质存在,而土壤有机质含量低于1%,会使碳酸钙、含钙磷灰石等矿物质难以转化为有效钙。2.钙在植物体内吸收运输缓慢且在各器官分配不平衡
In recent years jujube tree bitter pox disease is more serious, jujube farmers use many conventional methods are difficult to control its harm, the occurrence of bitter pox disease year prevention, annual susceptible situation. After the author’s analysis, the disease caused by non-pathogenic bacteria, but due to calcium caused by jujube. First, the cause of jujube bitter pox disease 1. In the soil insufficient supply of available calcium Effective soil calcium ions and soil colloids are adsorbed. In general, there is very little available calcium in soil, only a few tens to hundreds of micrograms. Calcium in the soil and more calcium carbonate, calcium apatite and other insoluble minerals exist, and the soil organic matter content of less than 1%, make calcium carbonate, calcium and other minerals apatite difficult to convert into effective calcium. 2. Calcium absorption in plants slow transport and distribution in various organs is not balanced