陕西省宝鸡县钓鱼台库区,1988年以来发现侧柏林枯萎现象,到1991年春有85%以上的林地感病,严重地段已整株枯萎死亡。据有关专家调查认为,这是一种与雨量、土壤排水等有关的生理性病害。立地低凹、积水、黄胶泥土壤,林分密度大,秋季多雨造成钾淋浴,冬季发生冻害,一到春天即出现大片枯萎。这一病害在陕西省发生较普遍。 Diaoyutai reservoir area in Baoji County, Shaanxi Province, since 1988 withered the phenomenon of siderosis, until the spring of 1991, more than 85% of the forest disease, a serious area has withered the whole plant died. According to the investigation of relevant experts, this is a physiological disease related to rainfall, soil drainage and the like. Site low, water, yellow clay soil, forest density, rainy autumn caused potassium shower, cold damage occurred in winter, one that appeared in the spring withered. This disease occurred more commonly in Shaanxi Province.