湖北大巴山针阔混交林森林小气候特征

Microclimate characteristics of Needle-Broadleaved Mixed Forest in Daba Mountains of Hubei

摘要:

以大巴山东脉的针阔混交林为对象,通过对气候因子的测定与分析揭示北亚热带典型针阔混交林森林小气候特 征 。依托湖北大巴山森林生态系统定位观测站对林内和林外空气温湿度、风速、降水量、太阳总辐射、光合有效辐射、土壤 温度等气候因子监测数据,分析鄂西北大巴 山针阔混交林小气候特征 。结果表明:林外空气温度和土壤温度一般高于林 内,冬季除外;观测期林内降水总量 839. 8mm,林外 1065. 8mm;林内按月度计算的平均风速为 0. 24m ● S-1 ,林外为 1. 02 m ● S-1 ,林外月平均风速远大于林内;对于太阳总辐射以及光合有效辐射而言,林内和林外均表现为夏季高于冬季,林内明 显低于林外 。试验证明湖北大巴山针阔混交林具有其森林小气候特征。

Abstract:

Focuses on needle-broadleaved mixed forests in the eastern range of Daba Mountains, aiming to reveal the mi- croclimate characteristics of atypical needle-broadleaved mixed forest in the northern subtropics through the measurement and analysis of climatic factors . Based on the monitoring data of climatic factors such as air temperature, humidity, wind speed,precipitation, total solar radiation, photosynthetically active radiation, and soil temperature inside and outside the forest at the Hubei Daba Mountain Forest Ecosystem Research station, the microclimate characteristics of the needle- broadleaved mixed forest in the northwest of Hubei province were analyzed. The result showed that the air and soil tem- perature outside the forest were generally higher than those inside, except in winter . The total precipitation inside the for- est during the observation period was 839. 8 mm, while it was 1065. 8 mm outside the forest. The monthly average wind speed inside the forest was 0. 24m ● s—1 , while it was 1. 02m ● s—1 outside the forest, with the average monthly wind speed outside being significantly higher than the average monthly wind speed inside . Both total solar radiation and photo synthet- ically active radiation inside and outside the forest were higher in summer than in winter, with values inside the forest be- ing noticeably lower than outside . The experiment proved, the needle-broadleaved mixed forest in the Daba Mountains of Hubei province exhibited its own microclimate characteristics .