林网田——长城沿线地区的基本农田建设模式

FOREST NET FIELD——A MODEL FOR BASIC CONSTRUCTION OF FARMLAND ALONG THE GREAT WALL LINE

陕、蒙、晋长城沿线地区,具典型的大陆性气候,旱灾频繁,风蚀水蚀严重,农业生产低而不稳。本文通过资料分析,论证了林网田在防风固沙,保护耕地资源,增加土壤水分,改善农田小气候方面的显著效益,并对林网(乔木林网和灌木林网)的营造规格进行了探讨。

Along both sides of the Great Wall of shaanxi,Inner Neimeng,Shanxi Provices,the dry damages are very frequently,and soil erosion by water and/or wind are very seriously in this region,these are main menaces to the devel- opment of the agricultural production.Practices proved that built the forest net field in this area on various kinds of lands,such as river plain,sandland and hillslopes are all effective measures for proventing land-sandificated,soil and water losses,and increasing the yield(or output)of agrocrop in unit area where are provided with a good conditions of water and fertilizer. This paper is based on the data obtained through survey,evaluation and analysis many problems such as the agroecological conditions,effectiveness of forest net filed and the construction of planning programs in this region.