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为进一步揭示农田防护林对小气候的影响,将设置于黑河流域中游农田防护林网内、外两个地面气象站8年的同步观测数据进行了定量比较分析,结果表明:夏季林网内日均、日最高、日最低气温比林网外低,而冬季林网内日均、日最高气温比林网外高,林网内昼夜温差比林网外大,林网内蒸发量仅为林网外的77.3%,林网内年均相对湿度大于林网外8%,林网形成的独特小气候,对水资源短缺的黑河流域地区具有重要的生理、生态及水文学意义;同时发现,林网内冬季、早春的昼夜温差、日最低、极端最低气温低于林网外,此刻的低温对越冬植物在休眠期、早春可能易受低温冻害。
In order to further reveal the impact of farmland shelterbelts on the microclimate, the synchronous observation data of two ground weather stations installed in and outside the farmland shelterbelts in the middle reach of Heihe River Basin were quantitatively analyzed. The results showed that: The highest and the lowest daily minimum temperature outside the forest network outside, and the average daily winter forest network, the maximum daily maximum temperature outside the forest network, the temperature difference between day and night forest network outside the forest network, forest network evaporation is only outside the network 77.3%. The relative average relative humidity in the forest network is more than 8% of the net outside the forest network. The unique microclimate formed by the forest network has important physiological, ecological and hydrological significance for the Heihe River basin where water resources are scarce. Meanwhile, , The temperature difference between day and night in early spring, the lowest day, the extreme minimum temperature is lower than the net outside the forest, the cold at this moment of winter plants in the dormant period, early spring may be susceptible to low temperature frost damage.