In intercropping systems, shading is one of the main limiting factors for the development of plants in the understory, especially C₄ plants. However, successful pasture production in silvopastoral systems can be achieved through proper spatial arrangement. This study provides fundamental information that validates the macauba-grass consortium. For 20 months, during two dry seasons and two rainy seasons, microclimatic and physical variables in an Acrocomia aculeata–Brachiaria decumbens intercropping system were monitored. The spacings of the trees were 5 m × 4 m, 6 m × 4 m, 7 m × 4 m, and 8 m × 4 m and were compared to a traditional pasture. The aboveground biomass in the intercropping system was estimated as well as its ability to assimilate atmospheric CO₂ and store carbon. Macauba palm presence in the intercropping system had a regulatory effect on the microclimatic conditions of the understory, regardless of tree spacing and season. In spacing, wider, the intercropped forage biomass was satisfactory and similar to that in the monocrop pastures. The spacing 7 m × 4 m and 8 m × 4 m improved the understory microclimatic conditions, allowing efficient forage growth and thus offering livestock food and comfort. These values were equivalent to those of traditional silvopastoral systems that use woody plant species. The estimates of aboveground biomass, carbon stock, and CO₂ assimilation in the intercropping system with a spacing of 8 m × 4 m were 1.6 times greater than those of traditional pastures. Therefore, here, we show for the first time that A. aculeata–B. decumbens grass intercropping system is a viable alternative agroforestry practice for tropical regions, since sufficient amounts of fodder are provided alongside beneficial environmental services, such as the efficient sequestration and storage of atmospheric carbon.

在间作系统中，遮荫是林下植物，尤其是 C ₄植物发育的主要限制因素之一。然而，在林牧系统中成功的牧场生产可以通过适当的空间安排来实现。这项研究提供了验证金刚鹦鹉-草联合体的基本信息。在 20 个月的时间里，在两个旱季和两个雨季，对Acrocomia aculeata – Brachiaria decumbens间作系统中的小气候和物理变量进行了监测。树木的间距分别为 5 m × 4 m、6 m × 4 m、7 m × 4 m 和 8 m × 4 m，并与传统牧场进行了比较。估计了间作系统中的地上生物量及其同化大气 CO 的能力₂、储碳。间作系统中的Macauba棕榈对林下的小气候条件具有调节作用，无论树间距和季节如何。在间距上，更宽的间作草料生物量令人满意，与单作牧场相似。7 m × 4 m 和 8 m × 4 m 的间距改善了林下小气候条件，允许草料高效生长，从而为牲畜提供​​食物和舒适感。这些值相当于使用木本植物物种的传统林牧系统的值。8 m × 4 m的间作系统地上生物量、碳库和CO ₂同化的估计值是传统牧场的1.6倍。因此，在这里，我们首次表明A. aculeata – B. decumbens草间作系统是热带地区可行的替代农林业实践，因为提供了足够数量的饲料以及有益的环境服务，例如大气碳的有效封存和储存。