摘要 There is general agreement that competition for r

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論文資訊

• 類型：已發表論文
• 日期：2012

摘要

There is general agreement that competition for resources results in a tradeoff between plant mass, M, and density, but the 數學 form of the resulting thinning relationship and the mechanisms that generate it are debated. Here, we evaluate two complementary models, one based on the space-filling properties of canopy geometry and the other on the metabolic basis of resource use. For densely packed stands, both models predict that density scales as M-3/4, energy use as M-0, and total biomass as M-1/4. Compilation and analysis of data from 183 族群s of herbaceous crop 物種, 473 stands of managed tree plantations, and 13 族群s of bamboo gave four major results: (i) At low initial planting densities, crops grew at similar rates, did not come into contact, and attained similar mature sizes; (ii) at high

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