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心止病是北方落叶松育苗的一害。它直接影响苗木的产量和质量,使之苗木不能当年出圃,增加了育苗成本。在无产阶级文化大革命中,我们遵照毛主席“抓革命,促生产”的指示,于1967-1968年研究了兴安落叶松和长白落叶松的幼苗心止现象。在此基础上,又于1974年组成了落叶松育苗技术协作组,分别在桦南县孟家岗林场。桦南县柳毛河苗圃和黑龙江林科院江山娇林场针对各地提出的落叶松苗心止现象产生的原因,进行了不同的单项试验。本文介绍的是一个初步观察与分析的结果。
Heart disease is a disease of Larix principis-rupprechtii. It directly affects the yield and quality of seedlings, so that seedlings can not be out of nursery that year, an increase of nursery costs. In the Great Proletarian Cultural Revolution, in accordance with Chairman Mao’s instruction of “catching the revolution and promoting production,” we studied the phenomenon of the seedlings of Larix gmelinii and Larix principis-rupprechtii from 1967 to 1968. On this basis, and in 1974 formed a Larch Seedling Technology Collaboration Group, respectively, in Mengnan Gang Hualien County Farm. Hualin County Liu Maohe nursery and Heilongjiang Academy of Forestry Lin Jiao Lin field Lark pine seedlings around the heart of the phenomenon caused by the phenomenon, conducted a separate test. This article describes the results of a preliminary observation and analysis.