中国科学院植物研究所黄耀研究员团队分别基于260项和1970项相关研究对免耕措施引起的土壤碳和作物产量变化进行了全球分析。相关成果发表于Global Change Biology（IF=8.88）。 阅读论文全文请点击文末阅读原文。 Conservation agriculture has been shown to have multiple benefits for soils, crop yield and the environment, and consequently, no‐till, the central practice of conservation agriculture, has rapidly expanded. However, studies show that the potential for carbon (C) sequestration in no‐till farming sometimes is not realized, let alone the ability to maintain or improve crop yield. Here we present a global analysis of no‐till induced changes of soil C and crop yield based on 260 and 1,970 paired studies, respectively. We show that, relative to local conventional tillage, arid regions can benefit the most from conservation agriculture by achieving a win‐win outcome of enhanced C sequestration and increased crop yield. However, more humid regions are more likely to increase SOC only, while some colder regions have yield losses and soil C loss as likely as soil C gains. In addition to site‐specific characteristics and management, a careful assessment of the regional climate is needed to determine the potential benefits of adopting conservation agriculture.
保护性农业已被证明对土壤、作物产量和环境有多种好处，因此，免耕这一保护性农业的核心措施被广泛应用。然而，有研究表明，免耕农业中封存的潜力有时并没有实现，更不用说保持或提高作物产量的能力了。本研究分别基于260项和1970项相关研究对免耕措施引起的土壤碳和作物产量变化进行了全球分析。研究结果表明，相对于当地的传统耕作，干旱地区能够从保护性农业中受益最大，实现增加碳汇和增加作物产量的双赢结果。然而，较湿润的地区更可能只增加土壤有机碳，而较寒冷的地区产量损失和土壤碳损失的可能性与土壤碳增加的可能性相同。除了区域特性和管理措施，还需要对区域气候进行仔细评估，以确定采用保护性农业的潜在效益。
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