The microclimatic characteristics of Pinus massoniana in different succession stages in Central Guizhou
CHEN Jin, XU Ming, ZOU Xiao, YANG Yun-li, YAN Ling-bin, ZHANG Jian
Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Fungal Resources, College of Life Sciences, Guizhou University, Guiyang 550025, China
Taking the different ages of Pinus massoniana plantation in the central Guizhou as the research object, using the space-time substitution method, 6 plots of farmland (control), forest gap, middle stage forest, near-mature forest, mature forest and over-mature forest were selected. Chosen a representative day and measure microclimate indicators at different times, and the observation indexes of different vertical heights (0.5, 1.0 and 1.5m) in the sites were compared. The results showed that:(1) Except that the wind speed varied with the measured height (1.5m > 1.0m > 0.5m), the difference was extremely significant (P<0.01), and the other observed indicators had no significant difference with the measured height (P>0.05). (2) During the observation period, there were significant differences in microclimates of Pinus massoniana forests in different forest ages (P<0.05), among which light intensity, photosynthetic photon flux density, air temperature, vapor pressure deficit and wind speed changed to farmland > forest gap > masson pine forests; relative humidity changed to masson pine forests > forest gap > farmland. (3) Compared with farmland, masson pine forests reduced light intensity, photosynthetic photon flux density, air temperature, vapor pressure deficit and wind speed by 917.36%, 837.35%, 5.33%, 30.77%, and 193.58%, respectively, increased relative humidity by 6.39%. Masson pine forests had significant effects of blocking sunlight, reducing air temperature, increasing wetness, maintaining humidity, and keeping microclimate stability under the canopy. In the early stage of succession, the effect of resisting sunlight and wind speed was obvious, while in the later stage, the effect of reducing air temperature, increasing and keeping humidity was remarkable. The comfort evaluation showed that in addition to winter, the masson pine forests in Central Guizhou played a good role in forest rehabilitation and recreation.
陈进, 徐明, 邹晓, 杨云礼, 严令斌, 张健. 黔中地区不同林龄马尾松小气候特征研究[J]. 中国环境科学, 2019, 39(12): 5264-5272.
CHEN Jin, XU Ming, ZOU Xiao, YANG Yun-li, YAN Ling-bin, ZHANG Jian. The microclimatic characteristics of Pinus massoniana in different succession stages in Central Guizhou. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(12): 5264-5272.
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