作物增产缓解了全球 “水足迹” episode artwork

EPISODE · Jul 21, 2025 · 4 MIN

作物增产缓解了全球 “水足迹”

from 食话实说播客

这份研究主要聚焦于 1972 到 2018 年间全球作物生产的 “水足迹” 变化,以及背后的关键影响因素,最终为水资源可持续利用提供了重要参考。一、什么是 “作物水足迹”?简单说,“水足迹” 就是生产作物过程中消耗的淡水量,包括两部分:“绿水”(来自雨水)和 “蓝水”(来自河流、地下水等人工灌溉水源)。比如种一亩小麦,雨水滋润和灌溉用水加起来的总量,就是它的水足迹。二、全球作物水足迹的整体变化1. 总量增长:1972 年到 2018 年,全球作物水足迹从 4799 立方公里涨到了 7773 立方公里,增长了 62%。其中,蓝水足迹增长 65%,绿水足迹增长 61%。2. 绿水占主导:不管是 1972 年还是 2018 年,绿水都占了水足迹的 85% 左右,也就是说,雨水是作物生长最主要的水源。3. 增长的 “抵消力”:为什么增长没更夸张?因为作物产量提高了!比如玉米,产量翻倍后...去小宇宙查看完整单集简介前往小宇宙评论区与主播互动

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作物增产缓解了全球 “水足迹”

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