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杨树钻孔深栽造林试验,在干旱的年份,造林成活率达90%以上,在钻孔深达1.3m时,胸径和生长速度比传统造林方式提高8%和3.6%。深栽的杨树插干下切口直接吸收地下水分,秋季造的杨树,随第2年土壤温度的逐渐升高,地下端吸收了足够的水分并形成了许多幼根,先生根后放叶,为幼苗的成活和生长提供了有利的条件,因此,在干旱的科尔沁沙地,钻孔深栽技术比传统造林技术显示出更大的优越性。
In deep-plantation experiments of poplar bark drilling, the survival rate of afforestation reached more than 90% in drought years, and the DBH and growth rate increased by 8% and 3.6% respectively when compared with the traditional afforestation method when the depth was up to 1.3m. Deep planted poplar inserted cut directly absorbed underground water, autumn made of poplar, with the first 2 years of soil temperature gradually increased, the underground end absorbs enough water and the formation of a lot of young roots, the root leaves after the release , Which provided favorable conditions for the survival and growth of seedlings. Therefore, in the arid Horqin sandy land, the deep borehole drilling technology shows more superiority than the traditional afforestation technology.