Silvopastoral系统作为牛肉生产的气候智能型替代方案：肠道甲烷排放中和和动物热舒适性增加

IF 6.1 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Agricultural Systems Pub Date : 2025-02-11 DOI:10.1016/j.agsy.2025.104277

Henrique B. Brunetti , Patrícia P.A. Oliveira , José R.M. Pezzopane , Alberto C. de C. Bernardi , Alexandre R. Garcia , Alexandre Berndt , André de F. Pedroso , Ana L.J. Lelis , Sérgio R. Medeiros

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引用次数: 0

摘要

背景气候智能型农业系统必须减缓气候变化并适应气候变化。目标(i)测试巴西森林系统（SPS）通过树木碳(C)同化来中和肠道排放CH4的能力，仅考虑用于高附加值产品（HVAP）和家具的茎-C，因为它们具有长期稳定性；（ii）测试SPS提高动物热舒适度的能力；（iii）与全太阳系统（FS）比较SPS生产效率、动物热舒适和CH4排放。方法采用Piatã栅栏草（Urochloa brizantha Stapf cv.），在4个区轮流放养肉牛。BRS Piatã]在2007年。在SPS中，2011年种植桉树（eucalyptus urograndis无性系GG100），行距为15 m × 2 m，行距为15 m × 4 m， 2016年减少到15 m × 4 m。在气象站收集小气候资料，确定黑球和湿度指数（BGHI）。使用Tier-2方程（IPCC方法学指南- 2019）估算CH4肠道排放。从2017年10月至2019年4月，每六个月测量一次树高和胸径，使用异速生长方程估算茎生物量。考虑到锯木厂的突破产量，茎生物量乘以其含碳量并乘以40%。结果与结论SPS组的sbghi低于FS组。即使考虑到SPS中适用于HVAP和家具的干碳（其载畜率比巴西平均水平高256%），77%的CH4肠道排放被抵消。当考虑所有茎干-C时，净C平衡为- 14.28 Mg CO2当量ha - 1年- 1。esp是缓解气候变化的有趣替代方案，同时提供令人满意的动物生产和增加动物热舒适。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Silvopastoral system as a climate-smart alternative for beef production: Enteric methane emission neutralization and animal thermal comfort increase

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Silvopastoral system as a climate-smart alternative for beef production: Enteric methane emission neutralization and animal thermal comfort increase

CONTEXT

Climate-smart agricultural systems must mitigate climate change and adapt to it.

OBJECTIVES

(i) test the ability of a silvopastoral system (SPS) in Brazil to neutralize the CH₄ enteric emission by tree carbon (C) assimilation, considering solely the stem-C destined to Products with Higher Added Value (HVAP) and furniture as valid, due to their long-term stability; (ii) test the SPS ability to provide increased animal thermal comfort and; (iii) compare the SPS productivity, animal thermal comfort and CH₄ emission with a full sun system (FS).

METHODS

The systems had four areas managed under rotational stocking with beef cattle and were established with Piatã palisadegrass [Urochloa brizantha Stapf cv. BRS Piatã] in 2007. In the SPS, eucalyptus trees (Eucalyptus urograndis clone GG100) were planted in 2011, in single east-west oriented rows, with a 15 m × 2 m spacing, and thinned to 15 m × 4 m spacing in 2016. Microclimate data were collected in weather stations to determine the Black Globe and Humidity Index (BGHI). The CH₄ enteric emission was estimated using the Tier-2 equation (IPCC Methodological Guide - 2019). Tree height and diameter at breast height were measured every six months from October/2017 to April/2019 to estimate the stem biomass using an allometric equation. The stem biomass was multiplied by its carbon content and by 40 % to consider the break-through yield in sawmill.

RESULTS AND CONCLUSIONS

BGHI was lower in the SPS than in the FS. Even considering the stem-C appropriate for HVAP and furniture in a SPS with a stocking rate 256 % greater than the Brazilian average, 77 % of the CH₄ enteric emission was offset. When considering all the stem-C, the net C balance was −14.28 Mg CO₂ eq. ha⁻¹ year⁻¹.

SIGNIFICANCE

SPS are interesting alternatives to mitigate climate change while providing satisfactory animal production and increased animal thermal comfort.

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来源期刊

Agricultural Systems 农林科学-农业综合

CiteScore

13.30

自引率

7.60%

发文量

174

审稿时长

30 days

期刊介绍： Agricultural Systems is an international journal that deals with interactions - among the components of agricultural systems, among hierarchical levels of agricultural systems, between agricultural and other land use systems, and between agricultural systems and their natural, social and economic environments. The scope includes the development and application of systems analysis methodologies in the following areas: Systems approaches in the sustainable intensification of agriculture; pathways for sustainable intensification; crop-livestock integration; farm-level resource allocation; quantification of benefits and trade-offs at farm to landscape levels; integrative, participatory and dynamic modelling approaches for qualitative and quantitative assessments of agricultural systems and decision making; The interactions between agricultural and non-agricultural landscapes; the multiple services of agricultural systems; food security and the environment; Global change and adaptation science; transformational adaptations as driven by changes in climate, policy, values and attitudes influencing the design of farming systems; Development and application of farming systems design tools and methods for impact, scenario and case study analysis; managing the complexities of dynamic agricultural systems; innovation systems and multi stakeholder arrangements that support or promote change and (or) inform policy decisions.