Light interception (LI) in grazing management has been an efficient tool to harvest forage under similar growth stage conditions. The objective was to define the best grazing management strategies (GMSs) based on LI in marandu palisadegrass (Brachiaria brizantha [Hochst. ex A. Rich.] R. Webster cv. Marandu) and calopo (Calopogonium mucunoides Desv. cv. Comum) mixed pastures. Three GMSs were evaluated in a randomized block design: rest period interrupted at 90% (90LI), 95% (95LI) and 100% (100LI) of LI. The experimental period was divided into four periods: rainy seasons and transitions (between rainy and dry seasons). Post‐grazing stubble height target was 15 cm. Canopy height, forage mass, leaf area index (LAI), morphogenic variables and tiller demographic pattern were evaluated. Pre‐ and post‐grazing canopy height increased at 100LI. Pre‐grazing forage mass decreased over time in all GMSs. The relationship among canopy height, forage mass and LI was not constant throughout the experiment. Post‐grazing forage mass was greatest at 90LI. There was an increase in legume mass throughout the experiment; however, the proportion of legume in pre‐grazing forage mass was no more than 6.6% for all GMSs. Number of calopo branches per plant and LAI increased throughout the experiment while the number of plants decreased. The 95LI provided the best conditions for calopo development; however, the LI as a tool to determine the entry of animals in mixed pastures of marandu palisadegrass and calopo should be carefully applied, considering the seasonal variations in canopy botanical and structural composition under similar LI.

中文翻译：

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基于光拦截来管理“ Marandu”木瓜和卡洛波牧场

放牧管理中的光拦截（LI）已成为在类似生长期条件下收获草料的有效工具。目的是根据马来杜鹃（Brachiaria brizantha [ Hochst。ex A. Rich。] R. Webster cv。Marandu）和calopo（Calopogonium mucunoides）的LI定义最佳放牧管理策略（GMS）设计 简历。Comum）混合牧场。在随机区组设计中评估了三个GMS：休息时间中断于LI的90％（90LI），95％（95LI）和100％（100LI）。实验期分为四个时期：雨季和过渡期（雨季和旱季之间）。放牧后残茬的目标高度为15 cm。评价了冠层高度，草料质量，叶面积指数（LAI），形态发生变量和分er人口统计学特征。放牧前后的冠层高度增加了100LI。在所有GMS中，放牧前的草料质量随时间减少。在整个实验过程中，冠层高度，草料质量和LI之间的关系不是恒定的。放牧后的草料质量最大，为90LI。在整个实验过程中，豆科植物的体重增加了。然而，豆科植物在放牧草料中的比例不超过6。所有GMS均为6％。在整个实验中，每株植物的Calopo分支数和LAI均增加，而植物数减少。95LI为calopo的开发提供了最佳条件；然而，考虑到相似的LI下冠层植物和结构组成的季节性变化，应该谨慎地使用LI作为确定动物进入马兰杜草和Calopo混合牧场的工具。