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新中国成立后,各地积极营造农田防护林,现有农田林网和林粮间作面积约3.5亿亩。凡是实现农田林网化的县、乡,都初步形成了新的农田生态系统,提高了农业产量,改变了穷困落后面貌,并突出了我国现代农田防护林的特点。因而引起了国内外的重视并给予较高的评价。现就其发展的总趋势,谈点意见,仅供参考。一、向非永久性的农田防护林发展丹麦林学家姜斯A.Mdrbin Iensen认为“非永久性的农田防护林,实为中国所首创”。过去,各国都认为要提高防护效能,应使林带树木生长高大、稳定和长寿,才能持久地发挥
After the founding of New China, all localities have actively created farmland shelterbelts, and the existing inter-crop farmland network and forest grain intercropping have an area of about 350 million mu. All the counties, towns and villages that realize the network of farmland and forest have formed a new farmland ecosystem, increased the output of agriculture, changed the poverty and backwardness, and highlighted the characteristics of the modern farmland shelterbelt. It has aroused the attention at home and abroad and given a high rating. Now on the general trend of development, talk about opinions for reference purposes only. First, to the development of non-permanent shelterbelt Danish forestry scientist A. Smith bin Iensen that “non-permanent farm shelter belts, in fact, pioneered by China.” In the past, all countries believed that in order to improve the effectiveness of protection, tall, stable and longevity forest trees should be brought into full play