摘要
合理地抚育间伐能够较大程度地提高林分的生产力。以宁夏六盘山水沟林场水沟坪林区华北落叶松林为研究对象,设置4个20 m×20 m的样地,分别为CK样地、1号样地、2号样地和3号样地(间伐强度分别为0、39.80%、48.90%和49.86%),于2019年进行初次间伐,监测记录2019年间伐、后2020、2021、2022和2023年5年的树高、胸径增长量,探讨不同抚育间伐后林分生长情况。结果表明,经过5年的抚育,不同间伐强度林分树高、胸径、材积、胸高断面积和蓄积量均有所增加。与2019年相比,2023年林分树高分别比CK样地增加4.41%、3.02%、3.82%;胸径比CK样地增加13.14%、19.83%、21.16%;林分材积比CK样地增加31.92%、39.23%、42.22%;林分胸高断面积比CK样地增加27.78%、38.87%、41.67%;林分蓄积量的增加值分别为97.25、76.00、66.23、44.75 m^(3)/hm^(2)。试验结果显示,间伐能够促进林分生长,以48.90%强度的效果最显著。本研究结果对于六盘山华北落叶松林分结构改善和森林质量精准提升具有重要的指导作用。
Reasonable tending and thinning treatment can greatly improve the productivity of forest stands.This study takes the Larix principis-rupprechtii forest in the Shuigouping forest area of Liupanshan Shuigou Forest Farm in Ningxia as the research object,with 4 sets of 20 m×20 m sample plot,consisting of CK sample plot,sample plot No.1,sample plot No.2 and sample plot No.3(with thinning intensities of 0,39.80%,48.90%and 49.86%,respectively),was first thinned in 2019.The growth of tree height and diameter at breast height was monitored and recorded after thinning in 2019,2020,2021,2022 and 2023,respectively,to explore the growth of different thinning treatments.The results showed that after 4 years of tending and different thinning intensities,the stand height,diameter at breast height,volume,cross-sectional area at breast height and volume all increased.After thinning,the tree height of Larix principis-rupprechtii in Liupanshan Diediegou Forest Farm increased by 4.41%,3.02%and 3.82%compared to CK plots,respectively;The chest diameter increased by 13.14%,19.83%and 21.16%compared to CK plots;The volume increased by 31.92%,39.23%and 42.22%compared to CK plots;The cross-sectional area of chest height increased by 26.74%,39.61%and 40.41%compared to CK plots;The increased values of stand volume were 97.25 m^(3)/hm^(2),76.00 m^(3)/hm^(2),66.23 m^(3)/hm^(2) and 44.75 m^(3)/hm^(2),respectively.The experimental results showed that thinning can promote stand growth,and the effect of 48.90%intensity treatment was the most significant in this study.The results of this study have important guiding significance for improving the structure of Larix principis-rupprechtii forest and accurately improving forest quality in Liupan Mountain.
作者
殷爱萍
吴苗
余治家
李卓
王正安
马杰
佘萍
贾宝光
Yin Aiping;Wu Miao;Yu Zhijia;Li Zhuo;Wang Zhengan;Ma Jie;She Ping;Jia Baoguang(Forestry Law Enforcement Brigade,Yuanzhou District,Guyuan City,Guyuan,Ningxia 756000;Forestry General Field in Yuanzhou District,Guyuan City,Guyuan,Ningxia 756000;Guyuan Branch,Ningxia Academy of Agriculture and Forestry Sciences,Guyuan,Ningxia 756000)
出处
《宁夏农林科技》
2023年第10期49-53,74,共6页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
宁夏回族自治区财政林业补助资金项目(宁财(资环)指标〔2023〕352号)
国家重点研发计划-土石山区华北落叶松林水源涵养及固碳功能提升技术(2022YFF1300404)
国家自然科学基金——区域创新发展联合资助项目“黄土高原泾河流域森林植被水文功能的形成与补偿机制”(U20A2085)。
作者简介
殷爱萍(1980—),女,宁夏固原人,高级林业工程师,主要从事林业项目规划设计、检查验收、林木种苗培育及林业科技推广工作;通信作者:余治家(1956—),男,宁夏彭阳人,正高职高级林业工程师,从事森林经营及特色花灌木繁育栽培技术研究。
