抚育间伐对落桦混交林生长过程的影响
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摘要
为探究抚育间伐对落桦混交林生长过程的影响,选择塞罕坝机械林场的落桦混交林作为研究对象,对其林木的生长变化进行研究,结果表明:落桦混交林经过3次抚育间伐后一定时间内林分的生长率都是增加的,白桦的生长率最高的为第1次抚育间伐后,为20.7%,而华北落叶松生长率最高的为第2次抚育间伐后,为13.5%;林分的3次抚育间伐后生长率都是先增加后减小,并且呈正态曲线变化。抚育间伐后生长空间增大,林分生长速度增加;经过一段时间后生长空间增幅变小,生长速度也随之减小。
In order to explore the effects of thinning on process of mixed forest of Larix principis-rupprechtii and Betula platyphylla,the mixed forest of Larix principis-rupprechtii and Betula platyphyllain Saihanba Mechanical Forest Farm was selected as the research object,and the growth and change of forest trees were recorded by field measurement and analysis of wood.Result shows that:The growth rate of forest stands increased after three times of thinning in the mixed forest.The highest growth rate of Betula platyphyllais 20.7%after the first thinning;the growth rate of Larix principis-rupprechtii after the second thinning is the highest,being 13.5%.After three times of thinning,the growth rate of the stand increase first and then decrease,and it shows a positive curve,indicating that the growth space increased after the thinning,the growth rate of the stand increased,and increase after a period of time.The spatially reduced growth rate also decreases.
In order to explore the effects of thinning on process of mixed forest of Larix principis-rupprechtii and Betula platyphylla,the mixed forest of Larix principis-rupprechtii and Betula platyphyllain Saihanba Mechanical Forest Farm was selected as the research object,and the growth and change of forest trees were recorded by field measurement and analysis of wood.Result shows that:The growth rate of forest stands increased after three times of thinning in the mixed forest.The highest growth rate of Betula platyphyllais 20.7%after the first thinning;the growth rate of Larix principis-rupprechtii after the second thinning is the highest,being 13.5%.After three times of thinning,the growth rate of the stand increase first and then decrease,and it shows a positive curve,indicating that the growth space increased after the thinning,the growth rate of the stand increased,and increase after a period of time.The spatially reduced growth rate also decreases.
引文
[1]邓送求,闫家锋,关庆伟.宝华山紫楠风景林林分空间结构分析[J].东北林业大学学报,2010,38(4):29-32
[2]聂鸿飞,孟凡玲,杜兴兰,等.河北塞罕坝国家级自然保护区的鸟类[J].河北林果研究,2016,31(2):132-135
[3]孟凡玲,聂鸿飞.塞罕坝自然保护区柳属植物资源及保护利用研究[J].河北林果研究,2016,31(2):136-139
[4]雷向东,陆元昌,张会儒,等.抚育间伐对落叶松杉落混交林的影响[J].林业科学,2005,41(4):78-85
[5]梁文俊,丁国栋,高广磊,等.华北落叶松人工林不同阶段经营密度研究[J].水土保持通报,2011,31(4),145-148
[6]史琛媛,路亚星,刘佳,等.抚育间伐对冀北山地华北落叶松生态景观林林内美景度的影响[J].河北农业大学学报,2016,39(3):66-72
[7]张岩,苑美燕,周泽宇.塞罕坝林区低密度经营对华北落叶松林分生长的影响[J].河北林果研究,2016,31(4):350-356
[8]李军,李云飞,李桂森,等.立地因子对冀北山区华北落叶松生长的影响[J].河北林果研究,2016,31(2):122-127
[9]张菲,张岩.塞罕坝地区华北落叶松人工林二元立木材积表编制研究[J].河北林果研究,2016,31(2):128-131
[2]聂鸿飞,孟凡玲,杜兴兰,等.河北塞罕坝国家级自然保护区的鸟类[J].河北林果研究,2016,31(2):132-135
[3]孟凡玲,聂鸿飞.塞罕坝自然保护区柳属植物资源及保护利用研究[J].河北林果研究,2016,31(2):136-139
[4]雷向东,陆元昌,张会儒,等.抚育间伐对落叶松杉落混交林的影响[J].林业科学,2005,41(4):78-85
[5]梁文俊,丁国栋,高广磊,等.华北落叶松人工林不同阶段经营密度研究[J].水土保持通报,2011,31(4),145-148
[6]史琛媛,路亚星,刘佳,等.抚育间伐对冀北山地华北落叶松生态景观林林内美景度的影响[J].河北农业大学学报,2016,39(3):66-72
[7]张岩,苑美燕,周泽宇.塞罕坝林区低密度经营对华北落叶松林分生长的影响[J].河北林果研究,2016,31(4):350-356
[8]李军,李云飞,李桂森,等.立地因子对冀北山区华北落叶松生长的影响[J].河北林果研究,2016,31(2):122-127
[9]张菲,张岩.塞罕坝地区华北落叶松人工林二元立木材积表编制研究[J].河北林果研究,2016,31(2):128-131