论文部分内容阅读
采用定点定时观测方法,在春夏秋3季对安塞县具有代表性的退耕模式如混交林、人工乔木林、人工灌木林及对照裸地进行小气候观测,选取光照强度、大气温湿度、土壤温度进行小气候特征分析。结果表明,不同退耕模式对小气候均有改善作用,较对照裸地降低了光照强度、大气温度和土壤温度,增加了大气湿度;混交林在改善小气候方面的作用最明显,人工乔木林次之,人工灌木林较差;季节更替对不同退耕模式的影响不明显。建议加大退耕还林力度,优化退耕地植被结构,增加退耕还林地区的植被覆盖率。
Using fixed-point timed observation method, we observed the microclimate of representative Ansai County, such as mixed forest, artificial arbor forest, artificial shrub forest and control bare land in spring, summer and autumn, selected the light intensity, atmospheric temperature and humidity, soil Microclimate characteristics were analyzed for temperature. The results showed that different modes of returning farmland had the effect of improving the microclimate, which reduced the light intensity, the atmospheric temperature and the soil temperature, and increased the atmospheric humidity. Compared with bare land, the effect of mixed forest on microclimate was the most obvious. The artificial shrub forest is poor; the effect of seasonal change on different modes of returning farmland is not obvious. It is suggested to increase the intensity of returning farmland to forests, optimize the vegetation structure of the land for returning cultivated land, and increase the vegetation coverage in the areas where forests are returned to farming.