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- Title
Impact of surface-net solar radiation and soil temperature on tea production in India: a study of the Dooars region in West Bengal.
- Authors
Mallik, Piyashee; Ghosh, Tuhin
- Abstract
Tea cultivation and industries employ a large population in the tea-growing regions of north India. Tea has its climatic niche and gradual changes in the climatic conditions can have a profound impact on its yield and quality. Despite being important climatic regulators on the growth of tea bushes, the effects of solar radiation and soil temperature on tea yield remain unexplored. Here, we developed a garden-level panel dataset using data from the tea gardens of the Dooars region, a major tea-producing region in India over 10 years, and statistically estimated the effects of surface-net solar radiation and soil temperature at different depths on monthly tea yield. We found that surface-net solar radiation had a negative effect (1.01 kg/ha decrease in average tea yield for 1 MJ m−2 day−1 increase in surface-net solar radiation) on tea yield and this negative effect was primarily associated with the summer season. Soil temperature just below the surface (0–7 cm) facilitated tea yield (1.05 kg/ha increase in average tea yield for 1°C temperature increase) in all seasons, whereas that at a depth of 100–289 cm had a negative effect (1.07 kg/ha decrease in average tea yield for 1°C temperature increase). For east and northeast-directed gardens, the effects of surface solar radiation on tea yield were different from the overall trend. Finally, projection of future tea yield based on predictions of surface solar radiation from three GCMs (MIROC5, CCSM4, and CESM1 (CAM5)) indicated that summer and winter tea production will potentially reduce by 1–5% and 0.9–4.4% respectively in the future (2021–2079) under RCPs 2.6, 4.5, and 8.5.
- Publication
Regional Environmental Change, 2021, Vol 21, Issue 4, p1
- ISSN
1436-3798
- Publication type
Article
- DOI
10.1007/s10113-021-01844-5