How Can We Realize Sustainable Development Goals in Rocky Desertified Regions by Enhancing Crop Yield with Reduction of Environmental Risks?
How Can We Realize Sustainable Development Goals in Rocky Desertified Regions by Enhancing Crop Yield with Reduction of Environmental Risks?
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DOI：
10.3390/rs13091614
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发表时间：
2021-04
期刊：
影响因子：
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通讯作者：
B. Liang;T. Quine;Hongyan Liu;E. Cressey;I. Bateman
中科院分区：
文献类型：
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作者：
B. Liang;T. Quine;Hongyan Liu;E. Cressey;I. Bateman
为了实现中国贵州等石漠化地区的可持续发展目标，我们应该以最小的环境成本实现作物产量的最大化。本研究首先计算了贵州省6种主要作物的产量缺口，并利用集成人工神经网络评价了作物产量与影响变量之间的定量关系。本文还考察了调整地方施肥灌溉量对贵州省作物生产的影响。结果表明，所选作物的总产量平均达到理论最高产量的72.5%以上。增加灌溉往往比增加施肥更能持续有效地提高作物产量。相反，在某些地区，适当减少施肥甚至可能有利于作物产量，同时显著提高施肥效率，降低环境残留。持续强化灌溉和施肥对大多数作物物种的总体积极影响有限。因此，建议当地利益相关者考虑采取其他农业管理措施来提高该地区的作物产量。
To meet the sustainable development goals in rocky desertified regions like Guizhou Province in China, we should maximize the crop yield with minimal environmental costs. In this study, we first calculated the yield gap for 6 main crop species in Guizhou Province and evaluated the quantitative relationships between crop yield and influencing variables utilizing ensembled artificial neural networks. We also tested the influence of adjusting the quantity of local fertilization and irrigation on crop production in Guizhou Province. Results showed that the total yield of the selected crops had, on average, reached over 72.5% of the theoretical maximum yield. Increasing irrigation tended to be more consistently effective at increasing crop yield than additional fertilization. Conversely, appropriate reduction of fertilization may even benefit crop yield in some regions, simultaneously resulting in significantly higher fertilization efficiency with lower residuals in the environment. The total positive impact of continuous intensification of irrigation and fertilization on most crop species was limited. Therefore, local stakeholders are advised to consider other agricultural management measures to improve crop yield in this region.