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- Title
Effects of land use type on diurnal dynamics of environment microclimate in Karst Zone.
- Authors
Li Sheng; Ren Hua-Dong; Yao Xiao-Hua; Zhang Shou-Gong
- Abstract
In June 2007, the diurnal dynamics of light intensity, air temperature, air relative humidity, soil temperature, and surface soil (0(KG-*2)-(KG-*7)5 cm) water content of five land use types in the typical Karst zone of Lingyun City in Guangxi Zhuang Autonomous Region were observed. The results showed that different land use types altered the composition, coverage, and height of aboveground vegetation, which in turn changed the environment microclimate to different degree. The microclimate quality was in the order of forestland>shrub land>grassland>farmland>rock land. On rock land, the light intensity, air temperature,air relative humidity, soil temperature, and soil water content were higher, and the diurnal variation of the five climatic factors was notable, with the micro climatic conditions changed towards drier and hotter. Compared with those on rock land, the light intensity on forestland, shrub land, grassland, and farmland decreased by 964%, 520%, 170% and 442%, air temperature decreased by 301%, 202%, 127% and 178%, air relative humidity increased by 1292%, 572%, 180% and 412%, soil temperature decreased by 115%, 8%, 25% and 55%, and soil water content increased by 426%, 332%, 157% and 140%, respectively. The five climatic factors on forestland and shrub land had lesser fluctuation, with the microclimate tended to cool and wet. Light intensity, air temperature, and soil temperature correlated positively with each other, and had negative correlations with air relative humidity and soil water content. A positive correlation was observed between air temperature and soil water content.
- Subjects
GUANGXI Zhuangzu Zizhiqu (China); CHINA; DIURNAL atmospheric pressure variations; BRIGHTNESS perception; UPPER air temperature; HUMIDITY; METEOROLOGY; SOIL temperature; VEGETATION dynamics
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 2, p387
- ISSN
1001-9332
- Publication type
Article