【摘要】 本文以湿地松中幼林为研究对象,研究了割灌除草和间伐两种抚育方式对林分胸径、树高及蓄积量的影响。连续3年监测结果表明,采取割灌除草和间伐措施的样地林分生长情况都好于对照。割灌除草处理间对胸径有极显著影响(P=0.005 9<0.01),对单株材积有显著影响(P=0.031 1<0.05);不同监测时间对胸径有极显著影响(P=0.000 1<0.01),对树高也有显著影响(P=0.014 6<0.05),对单株材积有极显著影响(P=0.001 6<0.01)。间伐处理间对胸径有极显著影响(P=0.002 2<0.01),对树高没有显著影响(P=0.065 3>0.05),对单株材积也有显著影响(P=0.028 3<0.05);不同监测时间对胸径有极显著影响(P=0.005 0<0.01),对树高也有显著影响(P=0.049 6<0.05),对单株材积有显著影响(P=0.030 9<0.05)。两种抚育方式都促进了湿地松中幼林的生长,抚育成效开始显现。试验为安徽省内湿地松中幼林的科学抚育提供了参考依据。更多还原

【Abstract】 In this paper, young and middle-aged Pinus elliottii plantations were the study objects and a study was made on the effects of tending methods of shrub cutting and weeding and thinning on the DBH, height and volume. The three-year consecutive monitoring results showed that the growth of the stands on sample plots with shrub-cutting and weeding and thinning was better than that of the control group. Shrub cutting and weeding had extremely significant effects on the DBH(P=0.0059<0.01), and significant effects on the individual volume(P=0.0311<0.05); different monitoring times had extremely significant effects on the DBH(P=0.0001<0.01) and the individual volume(P=0.0016<0.01) and significant effects on the height(P=0.0146<0.05). Thinning had extremely significant effects on the DBH(P=0.0022<0.01) and significant effects on the individual volume(P=0.0283<0.05) while having no significant effects on the height(P=0.065 3>0.05); different monitoring times had extremely significant effects on the DBH(P=0.0050<0.01) and significant effects on the height(P=0.0496<0.05) and the individual volume(P=0.0309<0.05). Both of the tending methods promoted the growth of young and middle-aged Pinus elliottii plantations and the tending effects began to appear. The results of the experiment could provide reference for scientific tending of young and middle-aged Pinus elliottii plantations in Anhui Province.更多还原