Economic Injury Level of Canjiqueira in Native Pastures in Pantanal of Nhecolândia

ABSTRACT: Pantanal plain has large extensions of land formed by many types of landscapes suitable to extensive livestock system. Open grasslands and lowlands are formed by forage such as grasses and forbs widely consumed by cattle. However, climatic and human factors can promote the dissemination of invasive shrub species such as canjiqueira (Byrsonima cydoniifolia A. Juss) making it necessary, in many cases, the human intervention to control the invasion. The present work had as objective to determine the economic threshold level to control canjiqueira through two methods: tractor driven blade and link chains pulled by tractor in different invasion levels plants per hectare. Economic Threshold proved to be a tool for efficient and effective management for making decisions of when and how to do the control of canjiqueira in natural pastures of Pantanal of Nhecolândia.

摘要：潘塔纳尔平原地域广袤，发育有多种景观类型，适配粗放型畜牧生产系统。区域内的开阔草原与低地分布有禾本科牧草与非禾本科草本饲草，均为牛群广泛采食的优质饲料。然而，气候与人为因素会加速入侵灌木物种的扩散，其中坎基雷拉（canjiqueira，Byrsonima cydoniifolia A. Juss）为典型入侵物种，多数情况下需通过人为干预开展入侵防控。本研究旨在通过两种防控手段——拖拉机挂载割刀法与拖拉机牵引链带法，针对每公顷不同入侵植株密度的样地，确定坎基雷拉的经济阈值（Economic Threshold Level）。研究结果表明，经济阈值可作为高效精准的管理工具，为内赫科兰迪亚（Nhecolândia）潘塔纳尔天然牧场中坎基雷拉的防控时机与防控方式决策提供科学支撑。