Litter decomposition and livestock excreta are two important sources for replenishing nutrients in the soil of the pastures, and their decomposition rates are affected by their quality, management practices, forage productivity, and biotic and abiotic factors. The objective of this research was to assess the effects of escalating levels of N fertilization (0, 100, 200, and 400 kg N ha⁻¹ yr⁻¹) on litter and fecal decomposition in an agroforestry system comprising palisadegrass [Urochloa brizantha (Hochst. Ex A. Rich.) Stapf. cv. Marandu] intercropped with hybrid eucalyptus trees [Eucalyptus urophylla × Eucalyptus tereticornis], in a two-year field trial. The experiment was set in a randomized complete block design with four treatments and three repetitions. Litter (0, 4, 8, 16, 32, 64, 128, and 256 days) and cattle excrement samples (0, 4, 8, 16, 32, 64, and 128 days) were incubated on the ground. For forage litter samples, the interaction between N fertilization × year was observed for the decomposition rate (k) of DM (P = 0.0014) and OM (P = 0.0094). The greatest litter OM disappearance was observed at 400 kg N fertilization ha⁻¹ year⁻¹ (651 g kg⁻¹ DM at 256 days). The interaction between nitrogen fertilizer rate × incubation time, or the isolated effect of the treatment was not observed on fecal decomposition (P > 0.05). Higher levels of N fertilization associated with the rainy period resulted in faster decomposition of palisadegrass litter, however, it did not show to have a strong influence on the excreta decomposition in this agroforestry system.

凋落物分解和牲畜排泄物是补充牧场土壤养分的两个重要来源，其分解率受其质量、管理措施、饲料生产力以及生物和非生物因素的影响。本研究的目的是评估不断增加的氮肥水平（0、100、200和400 kg N ha ^-1  yr ^-1）对由栅栏草组成的农林系统中的凋落物和粪便分解的影响 [ Urochloa brizantha (Hochst) .前A.里奇。）斯塔普夫。简历。Marandu]与杂交桉树[尾叶桉 × 细角桉]间作，在为期两年的田间试验中。该实验采用随机完整区组设计，进行四次处理和三次重复。将垫料（0、4、8、16、32、64、128 和 256 天）和牛粪便样品（0、4、8、16、32、64 和 128 天）在地面上孵育。对于饲草凋落物样品，观察了氮肥施肥×年份之间DM（P  = 0.0014）和OM（P = 0.0094）分解率（k ）之间的相互作用 。^{在施肥 400 kg 氮 ha -1} 年^-1时观察到最大的窝 OM 消失（256 天时651 g kg ^{-1 DM）。}未观察到施氮量×培养时间对粪便分解的交互作用或处理的孤立效应（P  > 0.05）。与雨季相关的较高水平的施氮导致栅栏草凋落物的分解更快，然而，它并没有表现出对该农林复合系统中的排泄物分解有强烈影响。