气候变化领域集成服务门户(CCPortal): Impact of climate change and genetic development on Iowa corn yield

CCPortal

DOI	10.3389/fagro.2024.1339410
	Impact of climate change and genetic development on Iowa corn yield
	Zai, Faisal H.; McSharry, Patrick E.; Hamers, Herbert
发表日期	2024
EISSN	2673-3218
起始页码	6
卷号	6
英文摘要	The vulnerability of corn yield to high temperature and insufficient rainfall in the US mid-west is widely acknowledged. The impact of extreme weather and genetic development on corn yield is less well known. One of the main reasons is that the multicollinearity in the variables can lead to confounding results. Here we model the impact of climate and genetic development by employing an elastic net regression model to address the multicollinearity issue. This allows us to develop a more robust multiple regression model with higher predictive accuracy. Using granular data for Iowa from 1981-2018, we find that corn yield is vulnerable to high mean summer temperatures particularly in July, a widening diurnal temperature range in June and dry summer conditions (due to extremely low rainfall) from June-August. We find that overall climate impact reduced average annual yield by 0.7%. We also find that genetic development which led to earlier planting dates, widening duration of the reproductive interval, higher growing degree day accumulation and larger net planted area had a beneficial impact on the Iowa corn yield during 1981-2018 resulting in an average annual yield improvement of 1.8% per annum. This provides a basis for optimism that these genetic developments and management practices will continue to adapt and improve in the future to counter the impact of climate change on corn yield. We have also modelled the impact of future climate change using the latest climate projections from the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC AR6). These climate projections show that the average temperature during the growing season (MayO-October) will increase by 2.4 -2.9 o C by mid-century while the average spring temperature (March and April) will increase by a relatively slower 1.9 -2.3 o C by mid-century. Additionally, climate projections show that both temperature and rainfall will also become more extreme in the future with the changes varying from spring to summer. Our results show that, just due to climate change alone in Iowa corn yield will decline between 1.4-1.7% per annum until mid-century (or 1.2-2.1% per annum until the late twenty first century).
英文关键词	corn yield; extreme weather; elastic net regression; genetic development; climate change
语种	英语
WOS研究方向	Agriculture
WOS类目	Agronomy
WOS记录号	WOS:001227872800001
来源期刊	FRONTIERS IN AGRONOMY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/307677
作者单位	Tilburg University; University of Rwanda; University of Oxford; Tilburg University; Tilburg University
推荐引用方式 GB/T 7714	Zai, Faisal H.,McSharry, Patrick E.,Hamers, Herbert. Impact of climate change and genetic development on Iowa corn yield[J],2024,6.
APA	Zai, Faisal H.,McSharry, Patrick E.,&Hamers, Herbert.(2024).Impact of climate change and genetic development on Iowa corn yield.FRONTIERS IN AGRONOMY,6.
MLA	Zai, Faisal H.,et al."Impact of climate change and genetic development on Iowa corn yield".FRONTIERS IN AGRONOMY 6(2024).