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我场地处江汉平原中的黄土丘陵,土壤粘重板结,多数年份出现伏旱和秋旱,再加这时气温高、日照时间长,往往引起苗木的死亡。过去我们多用搭荫棚或间作蓖麻、黄豆等方法遮荫保护苗木,但用工多、成本高、效果差。近几年来,我们试验成功了杉树全光育苗和杉桐间作育苗,既节约了人工和资金,又提高了苗木合格率。我场畜牧队杉桐间作育苗,亩产杉苗54,000株,合格苗为45,720株,合格率88%,产桐苗600-900株,每亩用工50个,比荫棚育苗节省2/3。杉苗生长情况见下表。
My field is located in the Loess Plateau in the Jianghan Plain. The soil sticks to the ground. Most of the years there are droughts and autumn droughts. When the temperature is high and the sunshine period is long, it often causes the death of seedlings. In the past we used to shade or intercropping castor, soybeans and other methods to protect seedlings shading, but more labor, high cost, poor results. In recent years, we successfully test the cedar tree seedlings and seedlings allophthalmus breeding, both to save labor and capital, but also improve the pass rate of seedlings. My field animal husbandry team fir seedling interplanting, mu yield fir seedlings 54,000, 45,720 qualified seedlings, the pass rate of 88%, producing Paulownia 600-900 strains, 50 workers per mu, than the shade shed nursery save 2/3. Growth of fir seedlings in the table below.