过去,玉溪地区一些县华山松造林多用“百日苗,1983年后,这个地区大面积推广“双月苗”造林。实践证明,用“双月苗”营造华山松,具有造林成活率高,成本低,方法简便易行等优点。只要做好造林后的管护工作,可做到一次造林成功。所谓“双月苗”,就是出圃苗龄为两个月左右的苗木。“双月苗”与“百日苗”相比,由于植株小,栽植时尚无须根,子叶也尚未散开,因此,植苗时伤 In the past, some counties in Yuxi Prefecture afforestation Huashan pine use “hundred days Miao, after 1983, large-scale popularization of this area” bimonthly seedlings “afforestation. Practice has proved that the use of” bimonthly seedlings “to create Huashan pine, afforestation survival rate, Low cost, simple and convenient method, etc. As long as the management and afforestation work after afforestation, afforestation can be successful once the so-called ”bi-monthly“, is the nursery seedling age of about two months. ”Bimonthly Compared with the “100-day seedlings”, because the plants are small, planting roots without roots, cotyledons have not yet spread, so when planting seedlings injury