خيارات البحث
النتائج 1 - 5 من 5
Carbon fluxes from an urban tropical grassland النص الكامل
2015
Ng, B.J.L. | Hutyra, L.R. | Nguyen, H. | Cobb, A.R. | Kai, F.M. | Harvey, C. | Gandois, L.
Turfgrass covers a large fraction of the urbanized landscape, but the carbon exchange of urban lawns is poorly understood. We used eddy covariance and flux chambers in a grassland field manipulative experiment to quantify the carbon mass balance in a Singapore tropical turfgrass. We also assessed how management and variations in environmental factors influenced CO2 respiration. Standing aboveground turfgrass biomass was 80 gC m−2, with a mean ecosystem respiration of 7.9 ± 1.1 μmol m−2 s−1. The contribution of autotrophic respiration was 49–76% of total ecosystem respiration. Both chamber and eddy covariance measurements suggest the system was in approximate carbon balance. While we did not observe a significant relationship between the respiration rates and soil temperature or moisture, daytime fluxes increased during the rainy interval, indicating strong overall moisture sensitivity. Turfgrass biomass is small, but given its abundance across the urban landscape, it significantly influences diurnal CO2 concentrations.
اظهر المزيد [+] اقل [-]Nitrogen and phosphorus leaching from fertilizer applied on golf course: lysimeter study
1998
Wong, J.W.C. (Hong Kong Baptist Univ., Kowloon (Hong Kong). Dept. of Biology) | Chan, C.W.Y. | Cheung, K.C.
Runoff pesticides from golf links
2000
Sasaki, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Terasawa, J. | Yoshida, H.
Using pattern of pesticides for golf course in Nagano prefecture [Japan]
1991
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Tsukioka, T. | Miyajima, I. | Takeda, Y.
Survey of pesticide residues in golf course
1991
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Tsukioka, T. | Miyajima, I. | Takeda, Y.
