In the dry land and garden plot, the soil eroding amount of terraced fields is only 1/3 of that be ploughed directly along the slope. It is difficult that assart along the contour in the dry land and garden plot, after the first 1~2 years, the soil eroding amount will increase at double. From the soil and water conservation point of view, the mode that integrates arbor, shrub and grass in woodland is the best, the mode that plants grass in bare land is the second.

等高作梯的旱耕地和園地土壤侵蝕量?jī)H為順坡直耕的早耕地和園地順坡的1/3左右；早耕地69不卡欧美、園地等高開墾的強(qiáng)度大日本子乱视频在线，開墾之后1~2年土壤侵蝕量成倍增長(zhǎng)；從水土保持角度看97久久久久精品无码一区二区97，林地喬国产拍拍91、灌、草結(jié)合模式最好人人摸天天操，裸地植草模式次之国产淫乱视频。

Effect of returning hill terraced fields for farming to forestry and grass were surveyed based on fixed point observation for nine years continuously. The results showed that death rate of Popular cathayana, Ulmus pumila and Hippophae rhamnoides was 100%, 92% and 12.7% respectively in terraced fields.

通過(guò)對(duì)湟源地區(qū)陰坡梯田退耕還林還草工程連續(xù)9年樣區(qū)定點(diǎn)觀測(cè)，結(jié)果表明亚日韩黄色网，在梯田栽植的楊樹到第9年100%死亡手机在线播放黄色网站视频，榆樹的成活率只有8%，沙棘的成活率為87.3%国产精品九一精品免费视频，檸條的成活率達(dá)100%玖玖资源站在线中文字幕，但長(zhǎng)勢(shì)不旺。

Today, Johnston traveled mountain waves of water, Bi Ye look blue sky, as the "Terrace kingdom" Zhuanglang earth, Wang Shanshan Cui, look to horizon, such as the carved layers of terraced fields, such as plastic, picturesque, and its "hill Hippophae Top hats, mountain terraces wrapped around the waist, side lock pasture dam ridge, Goudi shoes "comprehensive management of the ecological model of terraced fields, making the Japanese come to visit, the Israeli agricultural experts can not help but praise:" This is Zhuanglang people in the Loess Plateau on the well-painted scenery of a charming landscape, it is the world's a miracle!"

如今国模高清，走遍莊山浪水五月日日操，放眼碧野藍(lán)天，被譽(yù)為&梯田王國(guó)&的莊浪大地黄片四区，望山山翠国产精品视频拍自网站，看地地平国产精品第99页在线观看看，層層梯田如雕如塑伊人一本精品久久久久，如詩(shī)如畫操人操人，其&山頂沙棘戴帽，山間梯田纏腰国产精品色区第12页，埂壩牧草鎖邊乱人伦中文视频在线www，溝底穿鞋&的生態(tài)梯田綜合治理模式，使得慕名前來(lái)考察的日本特级毛片全部免费播放在线、以色列農(nóng)業(yè)專家情不自禁地稱贊：&這是莊浪人民在黃土高原上精心描繪的一幅景色迷人的風(fēng)景畫欧美性Ⅴa，簡(jiǎn)直是世界奇跡！&

Turn hillsides into terraced fields：坡改梯

瓶頸制約 Bottleneck restrictions | 坡改梯 Turn hillsides into terraced fields | 迫遷事件 Forced removal, forced relocation