Vetiveria zizanioides and grass blanket combination based green slope protection method

Abstract

The invention discloses a vetiveria zizanioides and grass blanket combination based green slope protection method. The method comprises the steps of planting vetiveria zizanioides (1) on a side slope (3), laying the front end of a grass blanket (2) in an anchoring ditch (4), fixing the grass blanket (2) by using a fixing piece (5), then covering the ditch with soil and treading down the soil; laying the grass blanket (2) by expansion from top to bottom; and forming an opening by using a tool in a position where the vetiveria zizanioides (1) is met, sorting out the vetiveria zizanioides (1), arranging the grass blanket (2) flatly, and fixing the grass blanket (2) by using the fixing piece (5). According to the vetiveria zizanioides and grass blanket combination based green slope protection method, during the early stage, rainstorm is prevented from washing out the side slope and the unstable vetiveria zizanioides depending on an anti-washout function immediately generated after the grass blanket is laid; and during the later stage, with the degradation of the grass blanket, the projects such as the side slope and the like are protected from being washed out by atmospheric precipitation and surface runoff depending on a living protective layer formed by a dense and netty fibrous root system formed by gradual growth of the vetiveria zizanioides in the ground and a strong steam leaf hedge formed by gradual growth of the vetiveria zizanioides on the ground, thereby achieving the purposes of stabilizing a soil body, conserving water and soil, improving the environment and preventing disasters.

Description

technical field [0001] The invention relates to a green slope protection method combining vetiver grass and grass blanket, and belongs to the technical field of slope water and soil consolidation. Background technique [0002] Vetiver (Vetiveriazizanioioles), also known as vetiver, belongs to the Gramineae perennial stout herb. Vetiver can grow at temperatures ranging from -10°C to 45°C and in areas with annual precipitation ranging from 300mm to 6000mm. Vetiver has a well-developed fibrous root system composed of adventitious roots from the stem and the underground part of the tiller, which develops densely in the form of a network, generally as deep as 2-3m, or even 5m. The tensile strength of vetiver roots reaches 40-120MPa (average 75Mpa), which is about 1 / 6 of the ultimate tensile strength of ordinary steel. Significantly higher than the mechanical tensile strength of many arbor and shrub roots. Therefore, the root system of vetiver has very strong penetrating power a...

AI Technical Summary

Problems solved by technology

The three-to-five-month growth period is from April to September, which is a period of frequent storms. Often, a heavy rainstorm will wash away and bury some vetiver that has not gained a foothold, and it will take a lot of manpower and material resources afterwards If replanted, the replanted vetiver will also be doomed in the event of a heavy rain, and the survival rate will be much lower than that of the original plant. Therefore, the slope protection function of vetiver will be greatly reduced

[0003] At present, the planting plan of vetiver slope protection is generally 1-2m in row spacing, and the plant spacing is less than 20cm. Years of practice have shown that the row spacing of this plan is too large. Effectively reduce the scouring force of rainwater, and the planted vetiver will not form a growth advantage, and will gradually degrade after many years, losing the function of slope protection

[0004] The plant fiber grass blanket is directly laid on the slope, and then it can produce the slope protection function against heavy rain erosion. However, after 6 to 12 months, the plant fiber grass blanket gradually degrades, and the slope protection function disappears.

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