Brazil is one of the few countries in the world that can produce animal products, grains, fibers, and bioenergy in the same area, either in a consortium, rotation, or succession. Our objective was to compare pasture productivity and animal performance in agroforestry systems with grass monoculture in the Brazilian Amazon Biome. The experiment was carried out in Sinop, MT, Brazil, with Nellore steers in a continuous stocking with variable stocking rate. The experimental design was a randomized complete block, with four systems and four replicates. The palisadegrass [Brachiaria brizantha (Hochst. ex A. Rich.) R. D. Webster cv. Marandu] was planted in the four systems: livestock (grass monoculture); livestock–forestry [eucalyptus trees (Eucalyptus urograndis; hybrid of Eucalyptus grandis W. Hill ex Maiden and Eucalyptus urophylla S. T. Blake) arranged in three-row groves spaced 30 m apart]; crop–livestock (palisadegrass after two years of crops); and crop–livestock–forestry (palisadegrass after two years of crops with single rows of eucalyptus trees spaced 37 m apart). The herbage accumulation was greater in the systems with the two previous cropping years (crop–livestock and crop–livestock–forestry) than in the livestock and livestock–forestry, in both seasons. In the crop–livestock–forestry, the greatest herbage accumulation associated with the modified microclimate supported the greatest average daily gain (0.750 kg BW day− 1), stocking rate in both seasons, resulting in the greatest gain per area (940 kg BW ha− 1). We conclude that agroforestry systems assure pasture productivity and animal performance similar or greater than livestock (grass monoculture). Furthermore, the combination of two previous crop years and the least tree density optimized the synergy between crop, livestock, and forestry components, improving beef cattle productivity in crop–livestock–forestry systems.

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农林业系统：在巴西亚马逊地区强化饲草牲畜的替代方案

巴西是世界上少数几个可以在同一地区以联合、轮换或连续方式生产动物产品、谷物、纤维和生物能源的国家之一。我们的目标是比较巴西亚马逊生物群落的农林复合系统与单一草本系统中的牧场生产力和动物性能。该实验在巴西 MT 的锡诺普进行，Nellore 阉牛在连续放养中进行，放养率可变。实验设计是一个随机完整区组，有四个系统和四个重复。栅栏草 [Brachiaria brizantha (Hochst. ex A. Rich.) RD Webster cv. Marandu] 种植在四个系统中：牲畜（草单一栽培）；畜牧业 [桉树（Eucalyptus urograndis；Eucalyptus grandis W. Hill ex Maiden 和 Eucalyptus urophylla ST 的杂交种 Blake) 排列成三排小树林，间隔 30 m]；作物–牲畜（种植两年后的栅栏草）；和作物 - 牲畜 - 林业（经过两年的作物种植，单排桉树间隔 37 m）。在前两个种植年度（作物-牲畜和作物-牲畜-林业）的系统中，两个季节的牧草积累量都大于牲畜和牲畜-林业。在作物 - 畜牧 - 林业中，与改良小气候相关的最大牧草积累支持最大的平均日增重（0.750 kg BW day− 1），两个季节的放养率，导致单位面积的最大增重（940 kg BW ha − 1)。我们得出结论，农林业系统确保牧场生产力和动物性能与牲畜（草单一栽培）相似或更高。此外，