论文部分内容阅读
桉树幼苗能耐蔭,但屬于阳性,对土壤肥力要求不严格;但随苗木生長时期的不同,对肥力要求和管理方法也不一致。 (一)播种发芽期: 卽从播种到发芽生出二瓣子叶。大槪需15天-20天时間,苗圃地要求管理非常細微,除了在播种前深耕、細耙、打細土块、平整苗床,施足基肥之外,最主要的工作是在播种后保持苗床土壤湿潤,天晴浇水要勤,复盖物厚薄要得当,盖馬尾松針厚度以不見苗床表土为标准。当地表溫度达到20-25°C之間,一般4-7天就可以发芽。出芽后需要分批分次除去复盖物,在了苗生長期间要有五防:①防旱:每隔1-2天用噴水壶浇水最好加点稀薄人粪尿。②防
Eucalyptus seedlings can shade, but they are positive, the soil fertility is not strict; but with the growth of seedlings of different requirements and management of fertility are also inconsistent. (A) sowing germination period: 卽 from sowing to sprouting to produce two cotyledons. It takes 15 days to 20 days for big banyan. Nursery management requires very little management. In addition to deep nurturing, fine raking, fine grading, seedbed leveling and foot-based fertilizer before planting, the most important job is to keep the seedbed after sowing Moist soil, sunny watering to ground, covering the thickness to be properly covered pine needles cover the thickness of the seedbed to see the topsoil as a standard. Local surface temperature reaches 20-25 ° C, usually 4-7 days to germinate. Sprouts need to be divided into batches to remove the cover, during the growth of seedlings to have five anti-Fang: ① drought: every 1-2 days with watering cans best add some thin human excrement. ② anti-