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Related Experiment Video

Updated: Jun 26, 2025

Imaging and Analysis for Quantifying Maize (Zea mays) Abiotic Stress Phenotypes

Imaging and Analysis for Quantifying Maize (Zea mays) Abiotic Stress Phenotypes

Published on: March 28, 2025

Moderately reducing N input to mitigate heat stress in maize.

Yuhan Zhou¹, Mayang Liu¹, Siyuan Chu¹

¹College of Agronomy and Biotechnology, China Agricultural University, Beijing, China.

The Science of the Total Environment

|May 12, 2024

Summary

Nitrogen fertilizer

Keywords:

High temperature Nitrogen fertilizer Yield Yield response Zey mays

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Area of Science:

Agricultural Science
Agronomy
Climate Science

Background:

Maize yields are threatened by high temperature stress during critical growth stages.
Nitrogen fertilizer is commonly used to boost maize production, but its efficacy under heat stress is uncertain.

Purpose of the Study:

To evaluate the impact of nitrogen fertilizer on maize grain yield under high temperature stress.
To understand how environmental and management factors influence nitrogen's effect on yield during heat events.

Main Methods:

A meta-analysis of 1536 comparisons from 113 studies in China over 20 years.
Data classified into high temperature stress (HT) and no high temperature stress (NHT) groups based on meteorological data.

Main Results:

Nitrogen's positive effect on maize yield was significantly reduced under high temperature stress.
Factors influencing nitrogen's effect differed between HT and NHT conditions, with fewer factors significant under HT.
Nitrogen input showed diminishing returns beyond specific thresholds in both NHT and HT.

Conclusions:

Optimizing nitrogen management is crucial for maintaining maize yields in a warming climate.
Reducing nitrogen input by approximately 20% may enhance maize's tolerance to high temperatures during flowering.
Improving soil characteristics and crop management has limited impact on nitrogen's effectiveness under severe heat stress.