【摘要】 通过对日本落叶松人工林实施不同方式的间伐试验,结果表明:不同的间伐技术措施,对日本落叶松人工林影响较大,其中定量下层间伐法间伐4年后,无论是胸径还是材积,其上层木平均生长量和生长率以及优势木的比例都表现最优;其次为定量强度和定性下层;机械间伐和对照表现最差。培育优质材种以定量下层、定量强度、定性下层间伐法为好;培育中小径材以定量上层间伐法适合;机械间伐法不宜提倡。更多还原

【Abstract】 Thinning experiments of Larix kaempferi plantation with different patterns were conducted.Result shows that:different thinning measures have greater effects on Larix kaempferi plantation;cutting for four years by using quantitative thinning from below,whatever DBH or volume growth,the performance of the average growth for the upper timber volume &growth rate as well as the proportion of the advantaged wood all are optimal;followed by quantitative intensity &qualitative lower layer,and the performance of the mechanical thinning &control are the worst.Quantitative thinning from below,quantitative strength & qualitative thinning from below are optimal for cultivating superior wood;quantitative thinning from above are optimal for cultivating small diameter timber;the mechanical thinning method is not suitable for promoting.更多还原