Method for preventing and controlling water and soil loss of slope farmland on contra-dip slope in karst trough valley area

A technology for sloping farmland and trough valleys, applied in the field of soil erosion control, can solve problems such as increased soil gravel content, high investment in changing slopes to terraces, and reduced land production capacity, and achieves the effects of low cost, low cost, and convenient operation

Inactive Publication Date: 2010-11-24
倪九派
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the control of soil and water loss in reverse-dip slopes and slopes in karst troughs and valleys is mainly carried out by converting slopes into terraces. However, since the rocky desert degree of reverse-dip slopes and slopes in karst troughs and valleys is generally high (over 20%), the method of converting slopes into terraces is generally high. Disadvantages: (1) After the conversion of slopes to terraces, with the increase of the net cultivated land area, the originally not thick soil layer of the reverse-dip slope farmland in the karst trough and valley area will be shallower, and the soil gravel content will increase; (2) The karst trough and valley area It will take a long time (3-5 years) for the newly improved soil to mature into land with higher production capacity, which will reduce the production capacity of the land in the short term; (3) High investment in slope conversion

Method used

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  • Method for preventing and controlling water and soil loss of slope farmland on contra-dip slope in karst trough valley area
  • Method for preventing and controlling water and soil loss of slope farmland on contra-dip slope in karst trough valley area

Examples

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Effect test

Embodiment 1

[0016] Example 1: "Field ridge + yellow flower hedge", in mid-September, the construction of "dirt ridge + yellow flower hedge" in the karst trough area against the slope slope, the yellow flower should be divided before transplanting, and the flower buds should be selected. , Good quality, 15-20-day-old plants with more tillers. Dig out all or part of the roots, separate the roots from the shortened stems according to the tiller nodes, and cut off the old roots. The roots can be cut short and transplanted as seedlings. Take the strip-like exposed rock formations on the reverse slope in the karst trough area as the ridge, and plant yellow flowers along the inner side of the ridge, with a hole distance of 25-35cm, using triangular or paired planting methods, 3-4 plants per hole, and transplanting Pay attention to the depth when planting, generally 15-17cm is better.

Embodiment 2

[0017] Example 2: "Ground ridge + vine plant fence", the propagation of vine is mainly by cuttings, and the cuttings are generally carried out in late spring and early summer or mid-to-early October. Collect semi-lignified healthy branches of the year without diseases and insect pests for cuttings. When cutting, cut the cuttings into 3-4cm long and leave 1-2 pairs of leaves. After cutting, immerse the whole cuttings with ABT rooting powder. ‰ solution, soak for 2-3 seconds, pick up and drain the water, and cuttage can be done after 2-3 hours. The depth of the branches inserted into the soil should be controlled at 1-1.5cm. When the moisture in the soil or matrix is ​​insufficient, the film should be uncovered in the evening, watered thoroughly and then immediately covered and sealed. When more than 90% of the cuttings take root, the film can be gradually removed for ventilation, and foliar fertilizer should be sprayed. When it grows to 1-2 cm, it can be transplanted. Take the...

Embodiment 3

[0018] Example 3: "Field ridge + vetiver hedge", vetiver should be properly "cut" before planting, it is advisable to keep 20-30cm above the ground of the seedlings, cut off the excess, and cut the roots of the seedlings to 5-10cm is appropriate. Vetiver is planted in two rows along the inner side of the ridge with the exposed rock formations in strips on the reverse slope in the karst trough area. The planting density can generally be determined as 22-30cm between plants and 10-15cm between rows. , with 4-5 tillers of vetiver as a clump to plant, and the vertical staggering of the vetiver seedlings in the upper and lower rows, in which any one plant in one line and the two plants adjacent to the left and right of the plant in the other line form a "pin" shape. After the seedlings survive, they can effectively intercept surface runoff and prevent slope erosion.

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Abstract

The invention discloses a method for preventing and controlling water and soil loss of a slope farmland on a contra-dip slope in a karst trough valley area. The method comprises the following steps of: (1), according to the terrain characteristics of the slope farmland on the contra-dip slope in the karst trough valley area, taking a stripped exposed horizontal rock stratum in the slope farmland as a ridge; (2), if a crack caused by corrosion is formed on the ridge, repairing the crack by stacking rock blocks to block soil, and if the crack is not formed on the ridge, directly carrying out a step (3); and (3), planting perennial plant fences along the inner side of the ridge. The method provides inexpensive and easily grasped technology for preventing and controlling the water and soil loss of the slope farmland on the contra-dip slope in the natural karst trough valley area; and the stripped exposed horizontal rock stratum serves as the ridge and the method brings convenience to field work for farmers. At the same time, the method for preventing and controlling the water and soil loss of the slope farmland on the contra-dip slope in the karst trough valley area has the advantages of no need of performing any engineering modification on the slope farmland, no influence on normal production of the farmers, user-friendliness, convenient operation and low cast.

Description

[0001] technical field [0002] The invention relates to the control of water and soil loss on reverse slope cultivated land in a karst trough area, and belongs to the technical field of water and soil loss prevention and control. [0003] Background technique [0004] The ecological restoration and reconstruction of karst ecologically fragile areas is a huge and complex systematic project. Under the background of rocky desertification and severe soil erosion, the primary issue of ecological environment construction is the prevention and control of soil erosion. In recent years, the contour hedge technology, which has been widely used in mountainous areas, is as effective in reducing soil erosion on slopes as field engineering measures such as terraces. The advantages in terms of investment ratio are better than that of a single farming system, and it has become one of the important methods for the protective utilization of slope soil resources. The traditional slope hedger...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D3/08A01G1/00
Inventor 倪九派谢德体谢世友魏朝富高明
Owner 倪九派
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