国产高清免费啪视频2020_男女啪啪毛片免费_午夜黄色视频在线观看免费_搜AAA级黄色视频_色偷偷男人的天堂久久_国产香蕉视频在线_国产爽妇网高潮在线观看_日韩av超持久1000免费精品_了解最新99热这里只有精品18_人妻系列在线亚洲

      The application mechanism of "building ecological plough bottom with sand based permeable and anti-seepage materials" is proposed. Three innovative technologies of permeable and anti-seepage, permeable water filtration and honeycomb water purification are adopted to create five systems of sponge soil structure, ecological green ridge, invisible honeycomb reservoir, rainwater collection circulation irrigation and intelligent management and control platform, forming an ecological sponge paddy field of "upper field and lower reservoir". It has six characteristics of water saving, emission reduction, fertilizer conservation, soil moisture conservation and ecology, and can cultivate some abandoned mining areas, desertification land, rocky desertification land and low yield dry land into high standard paddy fields.