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坡地修梯田是我国劳动人民长期生产实践中的创造。伴随坡地变梯田的发展,形成了大量的地埂坎。它占地多少随地面坡度和梯田形式而异,一般埂坎占地5～20％。我国是人均土地资源较缺的国家,对梯田埂坎的利用不可忽视。 我国南方很早就有利用地埂坎栽植林木、果树、茶树的习惯。据福建茶叶研究所徐赛禄观察报导,20°茶园梯壁(地坎)在没有绿化的条件下,年每亩流失土960公斤,折流失氮0.95公斤,腐殖质7.5公斤,梯壁(地坎)内移1.2厘米,茶树根外露。梯沿(地埂边)与梯壁(地坎坡)种植知风草后,由于根系密集固土,茎叶覆盖梯岸梯壁,不受雨水击溅,土壤侵蚀明显减弱。在种植三年后的地埂上,坎壁无明显冲沟和崩塌现象,
Slope cultivation of terraces is the creation of long-term production practices of our working people. With the slope terraces change the development of the formation of a large number of ground ridge. How much of it depends on the ground slope and the form of terraced fields, the general ridge accounts for 5 to 20%. China is a country with scarce land resources per capita and the use of terrace can not be neglected. South China has long been the use of land to plant trees, fruit trees, tea trees habit. According to the report of Xu Siro of the Tea Research Institute of Fujian Province, under the condition of no afforestation, there are 960 kilograms of soil lost per mu per mu, 0.95 kilograms of nitrogen loss and 7.5 kilograms of humus per day on the ladder wall (ridge) Move 1.2 cm, the roots of tea tree exposed. After planting Phyllostachys praecox on the edge of stalagmite and terraced slopes, the soil erosion is obviously weakened due to dense root system of soil and stems and leaves covering the ladder wall of the stepladder. After planting three years later, there was no obvious gully and collapse in Campbell,