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为了使山东石质山地直播造林有较高的出苗率和成活率,我们研究了不同覆盖方式对刺槐直播造林的影响,结果表明:地膜覆盖有效地增加了土壤各层温度;提高了0～30cm土壤的水分含量,给刺槐生长造就了良好的水分环境;提高了出苗率和苗高,确保了干旱土地上幼苗发芽出土,且苗全苗壮。覆草的各层地温比露地的低,但温度相对稳定,变幅小;提高了0～20cm土壤的水分含量;覆草的出苗率虽然较露地的低,但苗高比露地的高,可以晚些去草,以提高出苗率。
In order to make direct seeding of Shandong Stone Mountain has a higher germination rate and survival rate, we studied the effects of different mulching on Locust direct seeding, the results showed that: Mulching effectively increases the temperature of the soil layers; improved 0 ~ 30cm Soil moisture content, to the growth of Robinia has created a good water environment; increased germination rate and seedling height, to ensure that the germination of arid land germinated, and Miao Miao Zhuang strong. The ground temperature of grass was lower than that of open ground, but its temperature was relatively stable and its amplitude was small. The moisture content of 0-20 cm soil was increased. Although the seedling emergence rate was lower than that of open ground, the seedling height was higher than that of open field. Go to the grass later to increase the germination rate.