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Growth and yield of some indigenous trees in an Amazonian agroforestry system: a rural-history-based analysis

机译：亚马孙农林业系统中某些本地树木的生长和产量：基于农村历史的分析

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摘要

Over the years farmers of Japanese descent in the Brazilian Amazon have planted indigenous trees that yield various products and services: fruit, seeds,bark, latex, oil, and shade and wind breaks for understory crop plants. Production of timber is often the intended end use of such planted trees. Long-term growth performance of these trees nevertheless has not been well documented. The authors constructed 65-year growth curves for nine indigenous tree species based on measurements of diameter at breast height (dbh), height, and tree age data provided by farmers in the Brazilian State of Pará. An index of wood prices used to calculate state stumpage taxes was then applied to mean stem wood growth curves to produce price curves. These price curves estimate both present value of standing timber, and the value added from annual growth of standing timber in the agroforestry systems studied. The results of this study provide local farmers with a tool to estimate potential annual income from the growth of their trees, and a basis for planning timber harvest rotations. This study's approach may be applicable in other parts of the tropics, where growth information about indigenous trees commonly used in agroforestry is lacking.
机译：多年来，在巴西亚马逊地区的日本血统农民种植了本地树木，这些树木可提供各种产品和服务：水果，种子，树皮，乳胶，油以及林下作物的遮荫和防风林。木材生产通常是此类人工树木的最终用途。但是，这些树的长期生长性能还没有得到很好的记录。作者根据巴西帕拉州农民提供的胸高（dbh）直径，身高和树龄数据的测量结果，为九种本地树种构建了65年生长曲线。然后将用于计算国家立木税的木材价格指数应用于平均茎木生长曲线，以生成价格曲线。这些价格曲线既估计了现成木材的现值，也估计了所研究的农林业系统中现成木材的年增长值。这项研究的结果为当地农民提供了一种从树木生长中估算潜在年收入的工具，并为规划木材采伐轮换提供了基础。这项研究的方法可能适用于热带地区的其他地方，那里缺少有关农林业中常用的本地树木的生长信息。

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