Water Availability Controls the Biomass Increment of Melia dubia in South India

编号 010032401

推送时间 20220103

研究领域 森林生态 

年份 2022 

类型 期刊 

语种 英语

标题 Water Availability Controls the Biomass Increment of Melia dubia in South India

来源期刊 forest

期 第324期

发表时间 20211130

关键词 aboveground biomass;  climatological water deficit;  farm forestry;  farmland woodlots;  rainfall gradient;  soil;  wood production; 

摘要 Farmland tree cultivation is considered an important option for enhancing wood production. In South India, the native leaf-deciduous tree species Melia dubia is popular for short-rotation plantations. Across a rainfall gradient from 420 to 2170 mm year–1, we studied 186 farmland woodlots between one and nine years in age. The objectives were to identify the main factors controlling aboveground biomass (AGB) and growth rates. A power-law growth model predicts an average stand-level AGB of 93.8 Mg ha–1 for nine-year-old woodlots. The resulting average annual AGB increment over the length of the rotation cycle is 10.4 Mg ha–1 year–1, which falls within the range reported for other tropical tree plantations. When expressing the parameters of the growth model as functions of management, climate and soil variables, it explains 65% of the variance in AGB. The results indicate that water availability is the main driver of the growth of M. dubia. Compared to the effects of water availability, the effects of soil nutrients are 26% to 60% smaller. We conclude that because of its high biomass accumulation rates in farm forestry, M. dubia is a promising candidate for short-rotation plantations in South India and beyond. View Full-Text

服务人员 王璐

服务院士 蒋有绪

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