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对森林生活起作用的阳光、温度、水分、大气和土壤等生态因子,在一定量的范围内,可以互相调节和补偿,使森林得以正常生长发育。例如,幼林生长期间,遇上干旱,增加土壤水分,不仅可以满足幼林对土壤水分的迫切需要,而且可以提高土壤养分的有效性,加速幼林生长。当林地土壤水分过多影响林木生长时,挖沟排出过多的土壤水分,便能增加土壤里的空气,适当提高土温,有利林木的根呼吸和好气性细菌分解土壤有机质,从而促进林木生长。又如,在高温地带育苗或选择造林地,通过进行
The ecological factors such as sunshine, temperature, moisture, atmosphere and soil that play a role in forest life can be adjusted and compensated each other in a certain amount of range to enable the normal growth and development of the forest. For example, during the growth of young forests, encountering drought and increasing soil moisture can not only meet the urgent needs of young forests for soil moisture, but also improve the availability of soil nutrients and accelerate the growth of young forests. When the excessive soil moisture in the woodland affects the growth of trees, the excessive drainage of soil water by digging ditches can increase the air in the soil and increase the soil temperature appropriately. The root respiration of the favorable forest and aerobic bacteria decompose soil organic matter to promote forest growth . In another example, raising seedlings in hot areas or choose afforestation, through