思茅松人工幼林留阔抚育方式的试验研究

在景谷县文朗试验林场的思茅松人工幼林内,进行了3种保留林分中阔叶树抚育方式的试验。通过与常规抚育方式作比较,研究了不同留阔抚育方式,对林地土壤化学性质的影响;对思茅松幼林的生长和抗松梢螟虫害能力的影响。结果表明:思茅松人工幼林的留阔抚育方式对幼林期思茅松的高、径、冠幅生长和生物量的积累影响不大;在3年生前不会引起林地土壤养分下降,并能使林分保留较多的物种,保障思茅松人工林中的生物多样性,有效阻止松梢螟对思茅松幼林的入侵,减少林内松梢螟的数量。因此,思茅松幼林期的留阔抚育方式可在生产中应用。

Experimental Study on Tending of Pinus kesiya var.langbianensis Young Growth Characterized by Maintaining Broadleaved Tree Species

The experiment on Pinus kesiya var.langbianensis young growth tending including three kinds of tending modes characterized by maintaining broadleaved tree species was conducted.Through comparing with the routine tending method,three tending modes were studied from the effects on soil chemical characteristics of forest land,the effects on the growth of Pinus kesiya var.langbianensis saplings,and the effects on the resistance to Dioryctria splendidella.The experimental results showed that in the stage of young growth,the tending mode of maintaining the broadleaved tree species would not affect the height,diameter and crown diameter growth of Pinus kesiya var.langbianensis saplings,neither the biomass accumulation of Pinus kesiya var.langbianensis young growth.The soil nutrients within 3 years from tending would not decline,and more species could be maintained,the biodiversity was conserved,and the resistance to Dioryctria splendidella was increased as well.The tending mode of maintaining broadleaved tree species was suggested to be used on forestry production.