近年来,娄底地区林科所和各县苗圃,积极培育各种大苗,以供应城镇、厂矿、机关、学校及农村四旁绿化的需要。在苗圃里,杂草繁殖快,特别是狗牙根、白茅、香附子等杂草难以清除。就是一年中耕除草3—4次,圃地还是杂草丛生,与幼苗争夺水肥,严要影响苗木生长。由于圃地杂草多,引起放牧牛羊,也对苗木造成损害。且圃地中耕次数多,费工多, In recent years, Loudi Prefecture Forestry Branch and the county nurseries, and actively nurture a variety of seedlings, to supply the town, factories, mines, institutions, schools and rural greening needs. In nursery, weeds reproduce quickly, especially bermudagrass, white grass, incense monkshood and other weeds is difficult to remove. Cultivated is weeding 3-4 times a year, or garden weeds, compete for water and fertilizer and seedlings, severely affect the growth of seedlings. Due to the large number of weeds in the garden, causing grazing of cattle and sheep, but also damage to seedlings. And the number of nurseries and land far more labor,