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Biological Control Methods of Soil Erosion in Steep Slope Gullies in Low Mountains and Hills of Yili River Valley

A soil erosion and valley technology, applied in botany equipment and methods, soil protection, plant cultivation, etc., can solve the problems of micro-ecological environment and vegetation development heterogeneity, poor soil and water conservation measures, and large slopes , to achieve the effect of strong suitability, long water and soil conservation time and good effect

Inactive Publication Date: 2019-03-19
XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These valleys and the steep slopes on both sides have always been the difficulty of soil and water conservation, because the slope is large and the soil layer is thin, and the steep slopes on the north and south sides of the valley and the soil characteristics, micro-ecological environment, and vegetation development at the bottom of the valley are significantly heterogeneous. Soil and water conservation measures are often ineffective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] a. Choose a steep valley with a ditch length of 30m and steep slopes of 15° on both sides, and excavate a continuous intercepting ditch along the contour line at the upper, middle and lower parts of the slope on the sunny side of the valley. The width of the intercepting ditch is 40cm, 30cm deep, hole planting is adopted between the 3 cut-off ditch belts, and the 2-year-old seedlings of the local drought-tolerant sun-loving shrub Hypericum spiraea are replanted with a row spacing of 2×2m, and the tree planting pit is in the shape of "pin" Excavate with a diameter of 40cm and a depth of 50cm, plant spiraea chinensis, fill the soil to 20cm below the surface, step on it, cover the surface soil with 10cm, and keep 10cm without filling, so as to realize the interception ditch and the upper part of the tree planting pit Step-by-step storage of runoff and sediment on the slope surface, and use of rainfall and snowmelt water to tend and replant shrubs;

[0015] b. Excavate a co...

Embodiment 2

[0018] a. Choose a steep valley with a ditch length of 30m and a steep slope of 18° on both sides, and excavate one, two and three intermittent interception water along the contour line at the upper, middle and lower parts of the slope on the sunny side of the valley. The intercepting ditch is 400cm long, 40cm wide, and 30cm deep, and the horizontal distance is 1m. Replant 2-year-old seedlings of the native drought-tolerant sun-loving shrub Hypericum spiraea with a row spacing of 2×2m. The tree planting pit is excavated in the shape of a "pin", with a diameter of 40cm and a depth of 50cm. Fill the soil to 20cm below the surface, step on it, cover the surface soil 10cm, keep 10cm without filling, realize the step-by-step retention of runoff and sediment on the slope surface in the intercepting ditch and the upper part of the tree planting pit, and use rainfall and snowmelt water to nourish and replenish Plant shrubs;

[0019] b. Excavate a continuous intercepting ditch along t...

Embodiment 3

[0022] a. Select a steep valley with a ditch length of 30m and a steep slope of 20° on both sides, and excavate one, two and three intermittent interception water along the contour line at the upper, middle and lower parts of the slope on the sunny side of the valley The intercepting ditch is 400cm long, 40cm wide, and 30cm deep. The horizontal distance is 1m. The 2-year-old seedlings of the drought-loving shrub Caragana chinensis; the 2-year-old seedlings of the native drought-tolerant sun-loving shrub Hypericum spiraea are replanted between each intercepting ditch with a row spacing of 2×2m, and the tree planting pits are in the shape of "pin" Excavate with a diameter of 40cm and a depth of 50cm, plant spiraea chinensis, fill the soil to 20cm below the surface, step on it, cover the surface soil with 10cm, and keep 10cm without filling, so as to realize the opposite slope between the intercepting ditch and the upper part of the tree planting pit Step-by-step storage of surfa...

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PUM

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Abstract

The invention relates to a biological control method for soil erosion at a steep slope gulley of a mountainous hilly region of Ili river valley. According to the method, a water-and-soil conservation function of vegetation is utilized and water-and-soil conservation species are selected according to local conditions, thereby optimizing spatial configuration of the vegetation. The water-and-soil conservation species are differentially configured on the gully and slopes at two sides. Furthermore according to a simple water-and-soil conservation measure, spatial configuration of each measure and the vegetation is constructed and optimized, thereby realizing blocking to slope runoff and mud caused by rainfall and snow melting. Furthermore the vegetation is cultivated by means of rainfall, thereby improving surface coverage, reducing slope runoff, blocking mud and realizing biological control for soil erosion at the steep slope gulley of the mountainous hilly region of Ili river valley. The biological control method settles problems of soil erosion at a two-stage gully which is vertical to a north-and-south river system in the mountainous hilly region of the Ili river valley and a water-and-soil conservation measure effectiveness difference caused by spatial heterogeneity of the gully and shady slope and sunny slope at two sides in soil and microenvironment in the mountainous hilly region of Ili river valley.

Description

technical field [0001] The invention relates to a method for preventing and controlling soil erosion in a low mountain and hilly area of ​​the Ili River Valley, in particular to a biological control method for soil erosion in a steep slope valley in the low mountain and hilly area of ​​the Ili River Valley. Background technique [0002] The arid area in Northwest my country accounts for more than a quarter of the country's land area. The dry and rainless climate, weak soil development and sparse vegetation cover have created a fragile and easily disturbed ecological environment in the arid area. Although it is dry and rainless, and the soil erosion is mostly wind erosion, the rainfall events in the arid area of ​​Northwest China are relatively concentrated during the year, mainly in spring and summer, and the snowfall in winter melts in spring. A layer of loose sediments in the fourth season is deposited, which creates objective conditions for water erosion, and therefore o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G17/00A01G22/00A01G22/40E02D3/00E03F5/10
CPCA01G17/005A01G22/00E02D3/00E03F5/10
Inventor 朱成刚李卫红陈亚宁史彦江
Owner XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI