建国三十多年来,我市兴修的81万多亩水平梯田,发挥了显著的拦泥蓄水、土壤改良和增产效益,为农业稳步发展发挥了作用。 (一) 梯田的拦泥蓄水作用大据测定,我市黄土原区坡耕地每亩年平均流失水量为20～30立方米,流失泥土1～2.5吨,使耕地肥力减退 In the thirty years since the founding of the People’s Republic of China, the city has built more than 810,000 mu of terrace terraces, which have played a significant role in the steady development of agriculture by playing a significant role in water conservancy, soil improvement and yield enhancement. (A) of the terraces of muddy water storage According to the determination of the city of loess slope area of ​​arable land per mu average annual loss of 20 to 30 cubic meters of water, soil loss of 1 to 2.5 tons, fertility decline