Ridge and furrow planting method to prevent and control desertification in the dry cultivated land of granite red soil in southern China

Abstract

A ridge-furrow planting method for preventing and controlling desertification of a southern granite red earth drought farmland comprises the following steps that (1) a piece of ridge-furrow land is selected from a granite red earth low-hummock hilly area; (2) a 'soil mixing method' is carried out in a convex slope drought farmland at the top of the mountain to perform desertification control, clay is moved to an uphill section to press sand and form planting ridges, the ridges and furrows are distributed alternatively, crops are planted in small holes formed in the ridges, and paspalum notatum is planted in the furrows; (3) 'contour strip intercropping' is carried out in the granite red earth drought farmland, the crops and pasture are planted in a contour strip mode, and a 'deep scarification method' is adopted at intervals for inter-tillage; (4) 'ridge-furrow alternated planting' is carried out in hill-foot gentle slope drought farmland, contour ridging is adopted, ridges and furrows are alternated and are both used for crop planting; (5) contour pasture strips are formed in an orchard; (6) stepped slop level drought farmland is changed into level terraces, soil ridges are formed on the outer sides of the terraces, 'bermuda grass' is planted in the ridges and the walls of the terraces, the inner sides of the terraces are dug to form 'bamboo-shaped ditches', and crops and medicinal materials are planted in the surfaces of the level terraces. By means of the ridge-furrow planting method for preventing and controlling the desertification of the southern granite red earth drought farmland, the water retention and holding capacity of soil can be improved, and the water and soil conserving effect is good.

Description

technical field [0001] The invention relates to a ridge and furrow planting method for preventing and controlling desertification in southern granite red soil dry cultivated land. Background technique [0002] Most of the granite red soil is distributed in the low hills and uplands, with a relative height of about 100m. It is one of the main soil types in the subtropical red soil area. [0003] The parent material of granite red soil is mainly composed of feldspar, quartz, and mica. Under subtropical hot and humid climate conditions, quartz weathers into sand grains, and feldspar decomposes into kaolin, forming a deep and loose weathering crust. The weathering crust soil is light in texture, and its sand grain content exceeds 40%, therefore, the water permeability is large, the corrosion resistance is small, and the soil erosion is serious. [0004] Due to serious water and soil erosion, that is, the dual effects of surface runoff and soil flow, the small clay and silt part...

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Problems solved by technology

[0005] At present, desertification of dry farmland in southern granite red soil is serious. No matter what kind of dry farmland in granite red soil, due to the traditional down-slope farming, soil erosion is serious; although many forest (fruit) lands have built horizontal terraced soil, they are frequently cultivated, and Many soil and water conservation measures are not in place, and water loss is still serious. The annual runoff depth is about 500mm, and the annual soil erosion is about 10t / h㎡. Coupled with the effect of soil flow, the clay layer in the soil layer is more leached, and the dry land is deserted. serious

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