一、序言朝阳地区位于辽宁西部,自然灾害较多,特别是干旱和大风对农业生产造成严重威胁,产量低而不稳。如何改变这种不利状况,恢复正常的生态体系,从长期观点出发,改变不利气候状况,充分利用气候资源是当前的紧迫任务。林网建设是恢复生态体系的组成部分,不但在经济上而且在科学上,对改变环境条件,稳定农业产量,缓和自然灾害的危害,都能起着不可忽视的作用。本文根据朝阳地区现有的护田林网类型,除了一般的气候条件分析外,并进一步探索了大气湍流扩散问题;在研究林网胁地问题时,又重点讨论了遮光区间,光照强度和对作物的 I. Preface The Chaoyang area is located in the western part of Liaoning Province and has more natural disasters. In particular, the drought and strong winds pose a serious threat to agricultural production with low and unstable output. How to change this unfavorable situation and restore the normal ecological system, from the long-term point of view, to change adverse climatic conditions and make full use of climate resources are the urgent tasks at present. The construction of the forest network is an integral part of restoring the ecosystem. It can play an important role not only economically but also scientifically in changing environmental conditions, stabilizing agricultural output and alleviating the harm caused by natural disasters. Based on the existing types of shelterbelts in Chaoyang, this paper explores the problem of atmospheric turbulence diffusion in addition to the general analysis of climatic conditions. In the study of the problem of shelterbelts in the forest land, we also focus on the shading interval, light intensity, of