气候变化领域集成服务门户(CCPortal): Ever-increasing agricultural land and water productivity: A global multi-crop analysis

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DOI	10.1088/1748-9326/abacf8
	Ever-increasing agricultural land and water productivity: A global multi-crop analysis
	Tuninetti M.; Ridolfi L.; Laio F.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	Producing more nutritious food with less resources, while preserving the natural ecosystems, is a key challenge of our society. In this paper we propose a macronutrient-based indicator of productivity, the nutrient land productivity (NLP), to measure the amount of calories, proteins, and fats produced per hectare of cropland. Over the period 1961-2016, we find that the global NLP has increased by 2.7-2.9% per year for calories and proteins, and between 2.1 and 4.6% for fats. However, such rates exhibit significant spatial patterns throughout the world depending on whether farmers adopted intensification (e.g. Eastern and South Asia, North America) or extensification (e.g. Sub-Saharan Africa) practices to boost nutrients production. Our outcomes, based on a production basket including 144 crops, show that cereals and pulses cultivations have been dominated by intensification practices coupled with a stable or decreasing harvested area. Conversely, for fruits and nuts cultivations extensification prevailed over intensification, while for oil crops most cultivations experienced a coupled action of the two practises. Finally, by coupling the NLP indicator with its nutrient water productivity (NWP) counterpart, we find that NWP has mainly changed following land patterns, with the exception of locations having undergone significant crop substitutions, namely from less toward more water demanding crops. Indeed, the transition toward perennial crops has increased the evapotranspiration demand over cultivated land by 14% on a global average. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Agricultural production; Land productivity; Nutrition security; Water footprint; Water productivity
语种	英语
scopus关键词	Cultivation; Natural language processing systems; Nutrients; Oils and fats; Productivity; Proteins; Agricultural land; Cultivated lands; Land productivities; Natural ecosystem; Perennial crops; Spatial patterns; Sub-saharan africa; Water productivity; Crops; agricultural land; agricultural research; global perspective; land use change; multicriteria analysis; water availability
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153716
作者单位	Department of Environmental, Land and Infrastructure Engineering, Politecnico di Torino, Turin, Italy
推荐引用方式 GB/T 7714	Tuninetti M.,Ridolfi L.,Laio F.. Ever-increasing agricultural land and water productivity: A global multi-crop analysis[J],2020,15(9).
APA	Tuninetti M.,Ridolfi L.,&Laio F..(2020).Ever-increasing agricultural land and water productivity: A global multi-crop analysis.Environmental Research Letters,15(9).
MLA	Tuninetti M.,et al."Ever-increasing agricultural land and water productivity: A global multi-crop analysis".Environmental Research Letters 15.9(2020).