我场为涝洼粘土地,比较瘠薄,茅草丛生,立地条件较差,又加上春旱严重,夏季降雨集中,对毛白杨生长都不利。为了又多又快又好地培育毛白杨苗,便从摸清苗期生长规律入手,制定科学的管理措施,达到毛白杨育苗速生丰产的目的。现将观察结果介绍如下,供参考。 My field is waterlogged clay, relatively infertile, thatched, poor site conditions, coupled with serious spring drought, concentrated rainfall in summer, the growth of Populus tomentune are negative. In order to cultivate Populus tomentosa seedlings more and faster and better, we start with finding the law of growth at seedling stage and formulating scientific management measures to reach the goal of quick-growing and high yielding. The observations are as follows, for reference.