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为探索桑寄生(Loranthu sparasitica)对西南桦(Betula alnoides)人工林可能造成的危害,于2009～2011年在广西14个林场(乡)的西南桦造林地,采用线路调查法和标准样地法对西南桦人工林受桑寄生危害情况进行调查。结果表明,广西天峨县林朵林场桑害生危害较重,其余地点发生危害较轻。西南桦桑寄生丛数量差异大,最多的每株树达5丛,最少的1丛;桑寄生主要寄生西南桦主干的中上部;坡位不同,寄生率不同;中坡寄生率高,长势好;桑寄生不仅降低寄主生长量,而且可致寄主枯死。桑寄生可通过营林措施等多种方法进行防治。为确保西南桦人工林健康生长,应当注意防治桑寄生危害。
In order to explore the possible damage caused by Loranthu sparasitica to artificial Betula alnoides plantations, from 2009 to 2011, the habitat of Southwest Betula platyphylla in 14 forest farms (townships) in Guangxi was surveyed using line survey method and standard plots method Investigation on the damage of Betula alnoides plantation by parasitism. The results showed that the damage caused by the mulberry trees in Lin Duo forest in Tian’e County in Guangxi Province was more serious and the hazard in other places was less serious. There are large differences in the number of parasitic plexus in the southwestern China, with the largest number of each tree reaching 5 plexuses and the least 1 plexus. The main parasitic stems of S. mongolica are in the upper and middle part of the trunk; the slope position is different and the parasitism rate is different; ; Sang parasites not only reduce the host growth, but also cause the host dead. Sang parasites by forest management measures and other methods of prevention and treatment. To ensure the healthy growth of Betula alnoides plantation, we should pay attention to the prevention and control of parasitic hazards.