| 引用本文: | 肖建明,石长春,魏道伟,等.毛乌素沙地退化防护林成因分析与修复改造建议[J].灌溉排水学报,0,():-. |
| Xiao Jianming,Shi Changchun,Wei Daowei,et al.毛乌素沙地退化防护林成因分析与修复改造建议[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 榆林毛乌素沙地治理取得了显著成就,但由于环境因素、人为因素等造成沙区防护林大面积退化。本文从防护林的退化成因方面进行了调查研究,并提出改造建议。退化防护林主要包括人工乔木林和灌木林,水资源匮乏和土壤肥力低下是造成林地退化的主要原因,而林分生理过熟、人为干扰和自然灾害也是导致退化的重要因素。通过引入常绿树种樟子松和沙地柏,把沙区退化林分改造成乔灌草结合、针阔叶混交、既有防护功效又有经济效益的稳定生态系统。修复改造退化防护林应注重从栽植到后期管护各个环节,加大抚育力度既能有效预防、修复退化林分,又可预防病虫害及火灾的发生。 |
| 关键词: 退化防护林;修复改造;抚育;退化成因 |
| DOI： |
| 分类号:S |
| 基金项目: |
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| Analysis of cause of degradation shelterbelt and suggestions for restoration in Mu Us Sandy Land |
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Xiao Jianming1, Shi Changchun2, Wei Daowei1, Chang Miaomiao1, Fu Bin1, Guan Lifeng3
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1.Yulin Forestry Research Institute;2.Shaanxi Academy of Forestry Sciences;3.Yuyang Forestry Seedling Station
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| Abstract: |
| Significant achievements have been made in the management of Mu Us sandy land in Yulin, but the shelter forest in the sandy area has been degraded in a large area due to environmental and human factors. This paper investigates the causes of the degradation of shelter forest, and puts forward some suggestions for transformation. The degradation protection forest mainly includes artificial arbor forest and shrub forest. The lack of water resources and low soil fertility are the main causes of forest land degradation, and the physiological over maturity of forest stand, human disturbance and natural disasters are also important factors leading to degradation. By introducing evergreen tree species Pinus sylvestris var. mongolica and Sabina vulgaris, the degraded forest in the sandy area was transformed into a stable ecosystem with the combination of trees, shrubs and grasses, coniferous and broad-leaved mixture, which has both protective effect and economic benefit. The restoration and transformation of degraded protective forest should pay attention to all links from planting to later management and protection, and increase the tending strength, which can not only effectively prevent and repair the degraded forest stand, but also prevent the occurrence of diseases, pests and fires. |
| Key words: Degraded Shelterbelt; Restoration and Transformation; Tending; Causes of Degradation |
