论文部分内容阅读
河北省永定河下游沙区的农田林网,是五十年代初期开始营造的。三十多年来较好地发挥了防风固沙、生产林副产品的综合效益。当前,林网(带)急待更新。《海、滦河平原农田林网综合效益和永续利用的研究》课题组,在巳有研究成果的基础上,三年来着重从林网总体考虑,进行了林网综合效益的观测,摸索通过更新达到永续利用的技术途径,取得了部分成果。
The farmland forest network in the sand area of the lower reaches of Yongding River in Hebei Province started in the early 1950s. Thirty years has played a better windbreak and sand production, the comprehensive benefit of the production of forest by-products. At present, Lin network (with) urgent update. “Sea, Luanhe plain farmland network efficiency and sustainable use of forest network,” the research group, in the light of existing research results, based on the three years, focusing on the overall consideration of the forest network, conducted a comprehensive observation of the benefits of forest network, through the exploration Update the technology to achieve sustainable use of ways and achieved some results.