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[1]徐峥静茹,杨晓梅,陈静,等.疏伐对不同林龄云杉人工林地被层水源涵养能力的影响[J].应用与环境生物学报,2021,27(03):657-666.[doi:10.19675/j.cnki.1006-687x.2021.02028]
 XU Zhengjingru,YANG Xiaomei,CHEN Jing,et al.Effect of thinning on the water conservation capacity of Picea asperata of different ages[J].Chinese Journal of Applied & Environmental Biology,2021,27(03):657-666.[doi:10.19675/j.cnki.1006-687x.2021.02028]
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疏伐对不同林龄云杉人工林地被层水源涵养能力的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
27卷
期数:
2021年03期
页码:
657-666
栏目:
国家重点研发计划项目之西南高山亚高山专题
出版日期:
2021-06-25

文章信息/Info

Title:
Effect of thinning on the water conservation capacity of Picea asperata of different ages
作者:
徐峥静茹杨晓梅陈静冯秋红李登峰李旭华蔡蕾刘兴良张利
1四川省林业科学研究院 成都 610081 2阿坝州林业和草原局 阿坝 624000 3阿坝州川西国有林保护局 阿坝 624000 4阿坝州林业科学技术研究所 阿坝 624000
Author(s):
XU Zhengjingru1 YANG Xiaomei2 CHEN Jing3 FENG Qiuhong1? LI Dengfeng1 LI Xuhua1 CAI Lei1 LIU Xingliang1 & ZHANG Li4
1 Sichuan Academy of Forestry, Chengdu 610081, China 2 Aba Prefecture Bureau of Forestry and Grassland, Aba 624000, China 3 State-owned Forest Protection Bureau of West Sichuan in Aba Prefecture, Aba 624000, China 4 Aba Autonomous Prefecture Forestry Institute of Science and Technology, Aba 624000, China
关键词:
云杉人工林疏伐林龄地被层枯落物水源涵养
Keywords:
Picea asperata plantation thinning forest age ground cover layer litter water conservation
DOI:
10.19675/j.cnki.1006-687x.2021.02028
摘要:
以川西亚高山暗针叶林区主要的人工林——云杉人工林为研究对象,通过在四川省理县米亚罗镇设置固定样地,进行群落调查、地被层(枯落物和苔藓)取样测定,探讨不同疏伐处理(S0:对照;S1:疏伐10%;S2:疏伐20%)对不同林龄云杉人工林(幼龄林:25年;中龄林:35年;近熟林:50年)地被层水源涵养能力的影响. 结果表明:林分成熟前,云杉人工林地被层持水能力随林龄增加而显著提高;从4年短期效应看,疏伐对云杉人工林地被层持水能力无显著影响. 地被层蓄积量组成中,枯落物大于苔藓,占比达55.64%-67.21%,且随着林龄的增加先升高后降低;地被层最大持水量组成中,枯落物占比为45.56%-52.26%,且随着林龄的增加逐渐升高. 枯落物蓄积量及最大持水量占比均随疏伐强度的增加先升高后降低,苔藓的贡献逐渐增加;枯落物蓄积量、最大持水率及最大持水量组成均表现为叶片大于枝干. 叶片蓄积量占比为53.02%-60.89%,最大持水量占比为64.27%-71.25%,且占比均随林龄增加逐渐升高,随疏伐强度增加先升高后降低. 因此,枯落物为地被层水源涵养功能的主要承担者,叶片则是枯落物水源涵养功能的承担主体,且两者的持水能力随着林龄的增加而升高,随着疏伐强度的增加先升高再降低;同时,林龄和疏伐强度的增加还逐步提高了苔藓的持水能力. 如何通过提高地被层中枯落物叶片及苔藓的蓄积量来提高地被层水源涵养能力,进而提高云杉人工林水源涵养能力将是今后其结构功能调整和可持续经营研究的重点. (图5 表8 参45)
Abstract:
This study was based on the subalpine dark coniferous forest area of the western Sichuan Picea asperata Mast. plantation to explore the effects of different thinning intensity treatments (S0: control, S1: thinning 10%, and S2: thinning 20%) on the water conservation capacity of P. asperata plantations of different ages (young stand: 25 years, middle-age stand: 35 years, and near mature stand: 50 years). A sample plantation plot was set up in Miyaluo Town, Lixian County, Sichuan Province for community investigation and sampling of the ground cover layer (litter and moss). When the stand was immature, the water holding capacity of P. asperata plantations increased significantly with increasing stand age. From the short-term effect of 4 years, thinning did not have a significant effect on the water-holding capacity of the ground cover layer of the P. asperata plantation. In the composition of the ground cover layer accumulation, the content of litter was greater than that of moss. The proportion of litter accumulation was 55.64%–67.21%, and as forest age increased, the proportion of litter first increased and then decreased. The proportion of litter in the ground cover layer with maximum water holding capacity was 45.56%–52.26%, and it gradually increased with increasing forest age. Litter was the main medium, where water was stored in the ground cover layer. The proportion of litter accumulation and maximum water holding capacity first increased and then decreased with increasing thinning intensity, and the contribution of moss gradually increased. Under different thinning treatments, litter accumulation, maximum water holding rate, and maximum water holding capacity of litter showed that the leaves were larger than the branches. The proportion of leaves in the accumulation was 53.02%–60.89%, and the proportion of leaves at the maximum water holding capacity was 64.27%–71.25%. As forest age increased, the proportion of leaves gradually increased; and as thinning intensity increased, the proportion of leaves first increased and then decreased. Leaves were the main contributor to the water conservation function of the litter. In the future, improving the water conservation capacity of P. asperata plantations by increasing the cumulated mass of litter leaves and moss in the ground cover will be the focus of research in terms of structural and functional adjustments and sustainable management of P. asperata plantations.

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[2]杨婷惠,祁凯斌,黄俊胜,等.林窗式疏伐对云杉人工林土壤持水性能的影响[J].应用与环境生物学报,2018,24(05):1171.[doi:10.19675/j.cnki.1006-687x.2017.12011]
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更新日期/Last Update: 2021-06-25