HUANG Cheng-biao,TAN Wei-ning,QIN Wen-geng,et al.Study on Soil and Water Loss in Karst Forest in Mulun[J].Research of Soil and Water Conservation,2012,19(04):34-37.
木论喀斯特森林水土流失规律研究
- Title:
- Study on Soil and Water Loss in Karst Forest in Mulun
- 关键词:
- 喀斯特森林; 水土流失; 养分流失; 木论国家级自然保护区
- 分类号:
- S715.3;S714.7
- 摘要:
- 森林水土流失是森林水文生态效益评价的重要指标。通过坡面径流小区测流法，于2006—2010年连续5 a对木论喀斯特森林及灌草坡植被进行水土流失的对比观测研究。结果表明：（1）林地年地表径流量为0.78～2.85 mm，年均值为1.77 mm，占年均降雨量的0.10%，比灌草坡（5.87 mm）减少了69.8%；（2）林地年土壤侵量为9.9～28.5 kg/hm2，年均值为17.7 kg/hm2，比灌草坡（58.7 kg/hm2）减少了69.8%；（3）林地年养分（N，P，K）流失量为0.008～0.028 kg/hm2，年均值为0.019 kg/hm2，比灌草坡（0.064 kg/hm2）减少了70.3%；（4）土壤及养分流失主要集中在5—8月，分别占全年流失总量的76.3%，92.7%，与该区同期降雨量的年内分配相匹配。
- Abstract:
- Forest soil erosion is an important indicator for evaluating ecological benefits of forest hydrology. The comparison of soil and water losses between the karst forest and shrub-grass vegetation was carried out in Mulun National Nature Reserve from 2006 to 2010 through the slope surface runoff plots. The results showed that: (1) the average surface runoff in Karst forest was 1.77 mm/a (0.78～2.85 mm/a), which occupied 0.10% of the local average annual rainfall and reduced 69.8% compared with the shrub-grass slope (5.87 mm); (2) the average soil erosion in Karst forest was 17.7 kg/(hm2·a), 9.9~28.5 kg/(hm2·a), decreasing 69.8% compared with shrub-grass soil erosion (58.7 kg/hm2·a); (3) the average total nutrient loss (N, P, K) in Karst forest was 0.019 kg/(hm2·a), reducing 70.3% compared with the shrub-grass (0.064 kg/hm2·a); (4) soil and water loss and nutrient loss mostly concentrated from May to August, accounting for 76.3%,92.7% of the total annual loss, which matched the rainfall pattern in the same area.
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备注/Memo
收稿日期:2011-12-6;修回日期:2012-2-16
基金项目:木论自然保护区森林气象水文生态效益监测研究项目（河科字2009-32）
作者简介:黄承标（1948- ），男（壮族），广西靖西人，教授，主要从事森林气象水文学研究。E-mail：biao168491@163.com。