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2014年 第1卷 第1期

大纲

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《农业科学与工程前沿(英文)》 >> 2014年 第1卷 第1期 doi: 10.15302/J-FASE-2014006

Managing nutrient for both food security and environmental sustainability in China: an experiment for the world

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Center for Resources, Environment and Food Security, China Agricultural University, Beijing 100193, China

发布日期 :2014-05-22

摘要

The challenges of how to simultaneously ensure global food security, improve nitrogen use efficiency (NUE) and protect the environment have received increasing attention. However, the dominant agricultural paradigm still considers high yield and reducing environmental impacts to be in conflict with one another. Here we examine a Three-Step-Strategy of past 20 years to produce more with less in China, showing that tremendous progress has been made to reduce N fertilizer input without sacrificing crop yield. The first step is to use technology for in-season root-zone nutrient management to significantly increase NUE. The second is to use technology for integrated nutrient management to increase both yield and NUE by 15%–20%. The third step is to use technology for integrated soil-crop system management to increase yield and NUE by 30%–50% simultaneously. These advances can thus be considered an effective agricultural paradigm to ensure food security, while increasing NUE and improving environmental quality.

关键词

integrated nutrient management ; integrated soil-crop system management ; environmental protection ; food security ; resource use efficiency

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京公网安备 11010502051620号 京ICP备11030251号-2