岩溶区水土保持综合治理技术效益分析——以官脉地小流域、高枧槽小流域为例

doi:10.16843/j.sswc.2018.03.009

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Abstract [Background] There are some key problems such as seasonal drought and water shortage poor soil loss, low agricultural productivity, low economic level in Karst regions. In this paper, taking the Guanmaidi Watersheds of Zhanyi county and the Gaojiancao Watersheds of Malong county in Qujing city of Yunnan province as an example, the research group popularized techniques of controlling the above problems and studied their benefits.[Methods] With reference to index value and weight, the research group investigated six indexes including pre-persuading of the core area, farmer participation, the satisfaction of the beneficiary, willingness of non-beneficiary, cost of investment, and return. The first four indexes were scored by the members of the project group, the supplier technical constructors, project liaison of the local water bureau, the beneficiary and non-beneficiary, and the cost and return were scored in accordance with the actual situation. The research group evaluated application benefit of techniques with facilities installation through weighting average score of above indexes. The benefits of the demonstration of planting Pennisetum giganteum z. x. lin and soil improvement were evaluated though setting up field controlled experiment, observing and comparing indexes such as leaf, plant height, yield, root biomass, soil moisture and soil chemical composition[Results] 1) The benefits evaluation of optimal allocation technology of water technologies were in the order as:Photovoltaic pumping (7.8) > modular water tank (6.9) > flexible water cellar (6.15), and the area of irrigation benefit reached 63 hm² after applying optimal allocation technology of water technologies. 2) The benefits evaluation of highly efficient utilization technology were in the order as:Drip irrigation (7.65) > plastic mulching with degradation membrane (6.3) > irrigation with drip bag (5.4) > infiltration irrigation with low-cost device (5.2), and the efficiency of water utilization increased by 30% after applying highly efficient utilization technology. 3) After soil improvement,the plants of corn and P. giganteum z. x. lin were bigger, the yield of corn increased by 8.82%, the yield of P. giganteum z. x. lin increased by 17%, the chemical composition of the soil increased by 6.54%-22.87%. 4) Compared the planting of corn with the planting of P. giganteum z. x. lin, the root of P. giganteum z. x. lin were intricate and massive, the root weight was 6 times higher and the soil water content was 48% higher. Feeding cattle using the plant of P. giganteum z. x. lin increased economic income by 240 000 RMB Yuan per ha comparing with corn.[Conclusions] These promotions of technologies mentioned above had obtained favorable effects, and comprehensively harnessing the existing problems in karst areas, which can be used as reference for the comprehensive management decision of soil and water conservation in the region and the application of technology in similar region.

Key words： Karst region photovoltaic pumping drip irrigation Pennisetum giganteum z. x. lin soil improvement comprehensive control of soil and water conservation

Received: 08 December 2017

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S157.2

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	LI Haiyan
	DING Jianhong
	BAI Yong
	WU Hao
	ZHANG Feng

Cite this article:

LI Haiyan,DING Jianhong,BAI Yong, et al. Promotion effects of comprehensive control technologies of soil and water conservation in Karst region:A case study of the Guanmaidi Watershed and the Gaojiancao Watershed[J]. SSWC, 2018, 16(3): 68-78.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2018.03.009 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2018/V16/I3/68

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