中国干旱半干旱地区防护林气候效应的分析

对中国干旱半干旱地区近几十年来防护林的气候效应进行了系统总结，指出防护林具有改善小气候的功能，可降低风速、增加空气湿度、调节气温，从而改善农作物生长环境、提高人们的生存质量；与小气候相比，防护林对区域性气候影响较小，但可显降低风速和沙尘暴发生频率。笔还对防护林气候效应研究中存在的问题进行了分析，提出了自己的观点，强调在该地区应因地制宜、适度地营造各种形式的防护林，集约经营、提高林分质量，以充分发挥其防护、经济和社会效益。

A Study on Effects of Protective Forest on Climate in Arid and Semi-arid Areas of China

The paper systematically summarized the effect of protective forest on climate in the arid and semi arid areas of China in the past decades. The results are as follows: since protective forest can reduce wind velocity, increase air humidity, and regulate air temperature, So that the growth environment of crops and the habitat quality of local people are improved. Compared with micro climate, the regional climate was slightly influenced by protective forest. But it obviously reduced wind velocity and frequency of dust storm. The paper also analysed some problems on climate research and raised some own views. It was emphasized that we should properly plant all kinds of protective forest by terms of corresponding sites, adopt intensive management, and improve stand quality, so as to make use of its protective, economic and social benefits.