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60年代初期,六盘山林区开始引种华北落叶松,到1985年底止,保存有近万亩人工林,生长表现良好。但落叶松育苗中的立枯病和早期封顶严重地影响了落叶松苗的生长。近年来,我们对落叶松苗立枯病和早期封顶的预防进行了试验,取得了一定的效果。实践证明,在育苗过程中,低温处理种子,施足底肥,追施磷肥;秋季播种,地膜覆盖,全光育苗;适时适量喷水,加强田间管理等措施能有效地预防松苗立枯病和早期封顶现象的发生。
The early 60s, Liupanshan forest began to introduce Larix principis-rupprechti, by the end of 1985, save nearly 10,000 acres of plantations, good growth performance. However, blight and early decapitation in larch seedling nurseries severely affected the growth of larch seedlings. In recent years, we tested the prevention of blight and early capping of larch seedlings and achieved some results. Practice has proved that in the process of nursery seedlings, low-temperature treatment of seed, foot application of fertilizer, topdressing phosphate; autumn seeding, mulching, photoperiod seedlings; timely and appropriate water, strengthen field management and other measures can effectively prevent the damping-off seedlings and early Capping phenomenon occurred.