营养介质技术在西南喀斯特地区植被恢复中的应用

IF 2.6 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Journal of Integrative Environmental Sciences Pub Date : 2018-01-01 DOI:10.1080/1943815X.2018.1471725
F. Wu, Changwu Liu, Hongkai Chen, Zhaofeng Diao, Shuang Zhao, H. Xie
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引用次数: 3

摘要

喀斯特石漠化(KRD)是人类活动和植被退化导致的全球性环境退化问题。由于严重的水土流失和大面积的裸露基岩,KRD的植被恢复非常困难。为实现青藏高原裸露基岩区植被恢复,根据西南喀斯特地区季节性降雨充沛、石灰岩裂隙极为发育、裂隙水丰富的特殊水文地质条件,开发了营养介质技术。本研究的目的是探讨利用营养培养基技术实现KRD地区植被恢复的可行性。通过室内和田间试验,测试了该营养液混合物的保水性、吸水性和养分保持性。结果表明,2号混合料第75天含水率和吸水率分别为19.9%和1.67 mm/d,可作为生产营养培养基的最佳配合比。田间试验结果表明,该营养培养基技术能有效保证田间苗木早期成活和后期持续生长,且营养培养基的养分损失较小。这种新颖的方法可以保持和吸收水分,并且树苗在旱季不需要人工供水和施肥,利用营养介质技术实现KRD地区植被恢复似乎是一种可行的选择。
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Use of nutrient medium technique for vegetation restoration in Karst region of Southwest China
Abstract Karst rocky desertification (KRD) is a global environmental degradation problem caused by human activities and vegetation deterioration. Vegetation restoration in KRD is very difficult due to severe water loss, soil erosion and extensive bare bedrock. For achieving vegetation restoration on bare bedrock areas of KRD, the nutrient medium technique was developed, which is based on the special hydro-geological conditions that is seasonal rainfall is abundant in Karst region of Southwest China and limestone fissures are extremely developed and rich in fissure water. The objective of this research is to investigate the feasibility of using nutrient medium technique to achieve vegetation restoration in KRD region. Through the indoor and field experiments, some properties of the nutrient medium mixture were tested, including water retention, water absorption and nutrient retention. The results showed that the moisture content on the 75th day and water absorption rate of No.2 mixture was 19.9% and 1.67 mm/d, respectively, which could be used as optimum mix ratio for producing nutrient medium. The field results showed that the nutrient medium technique could effectively guarantee the survival of sapling at early age and sustainable growth at later age in the field, and the nutrient medium had less nutrient loss. This novel approach can retain and absorb moisture, and saplings do not need artificially supply water and fertiliser in the dry season, and the use of nutrient medium technique to achieve vegetation restoration in KRD region seems to be a feasible option.
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来源期刊
CiteScore
3.90
自引率
0.00%
发文量
13
审稿时长
>12 weeks
期刊介绍: Journal of Integrative Environmental Sciences (JIES) provides a stimulating, informative and critical forum for intellectual debate on significant environmental issues. It brings together perspectives from a wide range of disciplines and methodologies in both the social and natural sciences in an effort to develop integrative knowledge about the processes responsible for environmental change. The Journal is especially concerned with the relationships between science, society and policy and one of its key aims is to advance understanding of the theory and practice of sustainable development.
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