HUANG Rong,WANG Hui,WANG Hui,et al.Effect of Low-Efficient Shelterbelt Improvement on Forest Soil Water Storage Capacity in Huajialing[J].Research of Soil and Water Conservation,2014,21(02):53-57.
华家岭低效防护林带改造对林地土壤蓄水性能的影响
- Title:
- Effect of Low-Efficient Shelterbelt Improvement on Forest Soil Water Storage Capacity in Huajialing
- Keywords:
- Huajialing; shelterbelt; soil water storage capacity
- 分类号:
- S714.7
- 摘要:
- 为探讨华家岭低效防护林带改造对林地土壤蓄水性能的影响，在华家岭防护林分布区选取生长不良的低效杨树纯林和改造后的云杉纯林、云杉×杨树、云杉×油松、云杉×落叶松混交林5种典型林带类型，对其土壤物理性状和蓄水性能进行对比研究，结果表明：（1）0—100 cm，5种林型土壤含水量均呈随着土层深度的增加而降低的趋势，平均土壤含水量表现为云杉纯林（25.10%） > 云杉×杨树林（24.13%） > 云杉×油松林（21.80%） > 云杉×落叶松林（21.42%） > 杨树纯林（18.20%）；（2）0—40 cm，云杉纯林及其混交林的平均土壤非毛管蓄水量、毛管蓄水量、总蓄水量均高于杨树纯林。亚表层（20—40 cm），云杉纯林、云杉×杨树林、云杉×油松林、云杉×落叶松林的毛管蓄水量较杨树纯林增加15.96%，6.65%，17.89%，10.83%，总蓄水量较杨树纯林增加14.33%，13.78%，19.57%，16.28%；（3）云杉纯林及其混交林的土壤含水量和总蓄水量与土壤容重的相关性好于杨树纯林，表明杨树低效林改造对提高黄土高原丘陵沟壑区林地土壤的蓄水性能具有积极影响。
- Abstract:
- In order to discuss the effect of low-efficient shelterbelt improvement on forest soil water storage capacity, the soil physical properties and water storage capacity were studied by choosing low-efficient P. hopeiensis pure forest which grew poorly and P. asperata pure forest, P. asperata×P. hopeiensis, P. asperata×P. tabulaeformis and P. asperata×L. prncipis-rupprechtii which were improved forests in Huajialing. The results showed that: (1) soil water content sof 5 forest types all decreased gradually with the increase of soil depth in 0—100 cm layer, the soil average water contents followed the order of P. asperata pure forest (25.10%) > P. asperata×Populus(24.13%) > P.asperata×P.tabulaeformis(21.80%) > P. asperata×L. prncipis-rupprechtii (21.42%) > P. hopeiensis pure forest(18.20%); (2) non-capillary water, capillary water and total water of soil in P. asperata pure forest and its mixed forests in 0~40cm layer were all higher than Populus pure forest. Compared with Populus pure forest, the capillary impoundage of P. asperata pure forest, P.asperata×P.hopeiensis forest, P.asperata×P. tabulaeformis forest and P. asperata×L.prncipis-rupprechtii forest increased by 15.96%, 6.65%, 17.89% and 10.83% in subsoil(20—40 cm), repectively, and their total water storage increased by 14.33%, 13.78%, 19.57%, 16.28%, repectively; (3) the correlations between soil water content, total water storage and soil bulk density of soil in P. asperata pure forest and its mixed forests were better than those in P. hopeiensis pure forest. Low-efficient P. hopeiensis forest improvement has positive effect on promoting forest soil water-holding capacity in loess hilly-gully region.
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备注/Memo
收稿日期:2013-08-07;改回日期:2013-09-11。
基金项目:甘肃省高等学校研究生导师科研项目“黄土丘陵区低效公益林改造技术及生态风险评价（1202-01）”
作者简介:黄蓉(1989-),女,甘肃天水人,硕士,主要从事水土保持与荒漠化防治研究。E-mail:gsauhr@163.com
通讯作者:王辉(1959-),女,甘肃武威人,教授,主要从事林业生态环境、荒漠化防治研究。E-mail:wangh@gsau.edu.cn