近日，中文成人直播-黄色直播网址 、中国农业政策研究中心黄开兴研究员以通讯作者身份与兰州大学草地农业科技中文成人直播 刘敏教授等在Nature子刊Nature Climate Change上发表题为“Grassland Restoration Increases Crop Yields through Local Climate Regulation”的文章。
Abstract
Ecosystem protection and food security are often viewed as competing goals, creating a critical policy dilemma for agricultural regions. Here we show that grassland restoration under China’s Grassland Ecological Compensation Policy significantly enhances maize yields through local climate regulation. Using a difference-in-differences design with county-level panel data, we find that restored grasslands reduce growing-season temperatures by 0.1 °C and increase precipitation by 11.48 mm, thereby mitigating heat and drought stress during critical reproductive stages. These changes extend the reproductive growing period by 0.93 days, increase yields by 7.76% (0.437 t ha−1) and reduce crop shortfall risk by 25.9%. Yield gains alone offset more than 80% of programme costs within 5 years and the additional production could alleviate 10% of the maize import deficit in the Northern Spring Maize Region. Our findings highlight ecosystem restoration as a scalable strategy for achieving climate-resilient food security in regions similar to our study area.
摘 要
该研究发现，在我国草原生态保护补助奖励政策实施背景下，草地恢复显著改善了我国北方春播玉米带的气候条件，使玉米生长季平均气温降低、降水增加，明显缓解了极端高温与干旱胁迫对玉米关键生育阶段的不利影响，进而使玉米单产提高7.76%（约0.437吨/公顷），减产风险下降25.9%。该研究突破了传统上将生态恢复与粮食安全视为相互权衡关系的认知，表明二者可以实现协同共赢，为“基于自然的解决方案”提供了坚实的实证证据。研究结论对于全球面临生态系统退化与气候变化双重挑战的农业地区具有重要的政策启示与推广价值。
图1. 研究区域与政策实施。a、2020 年研究区域草地归一化植被指数（NDVI）；b、2020 年研究区域玉米种植分布；c、草原生态补偿政策（GECP）实施情况；d、GECP对草地归一化植被指数（NDVI）的影响。
图2. 草地恢复影响玉米产量的机制路径。a、GECP对玉米产量的影响；b、GECP对玉米减产的影响； c、GECP对生长度日（GDD）与高温胁迫积温（HDD）的影响；d、GECP对营养生长期（VGS）、生殖生长期（RGS）时长的影响；e、生长度日 (GDD)、高温胁迫积温 (HDD)、生殖生长期 (RGS)、营养生长期 (VGS)、降水量 (PRE) 对玉米产量的边际影响；f、生长季逐月降水对玉米减产的影响。
文章引用：
Liu, M., Huang, K., Wang, J. et al. Grassland restoration increases crop yields through local climate regulation. Nat. Clim. Chang. (2026).