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[Light environment characteristics in maize-soybean strip intercropping system].

Yang Gao¹, Ai-Wang Duan, Zu-Gui Liu

¹Institute of Farmland Irrigation Research, Chinese Academy of Agricultural Sciences, Xinxiang 453003, Henan, China. gylcx0944@yahoo.com.cn

Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology

|September 24, 2008

Summary

Maize-soybean intercropping light distribution impacts crop biomass. Inner soybean rows received more light and had higher biomass than edge rows, especially in early growth stages.

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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

Area of Science:

Agricultural Science
Agronomy
Crop Physiology

Context:

Narrow strip intercropping systems are increasingly studied for optimizing land use and crop productivity.
Understanding the light environment within intercropped canopies is crucial for managing crop growth and yield.
Maize-soybean intercropping presents a complex light competition scenario due to differing plant architectures and growth habits.

Purpose:

To investigate the spatial distribution of photosynthetically active radiation (PAR) within maize-soybean narrow strip intercropping systems.
To analyze the impact of varying light environments on crop biomass accumulation in intercropped maize and soybean.
To compare the effects of different intercropping ratios (1:3 vs. 2:3) on light transmittance and crop biomass.

Summary:

Light transmittance varied spatially within the canopy, with higher light penetration at the bottom of edge soybean rows adjacent to maize in early growth stages.
Daily photosynthetic photon flux density (PPFD) was higher above inner soybean rows compared to edge rows during early growth, with significant differences observed after flowering.
Biomass accumulation in soybean was greater in inner rows than edge rows, indicating that light availability is a primary driver of biomass differences under adequate irrigation.

Impact:

The findings highlight the importance of light environment management in narrow strip intercropping systems to maximize crop biomass and yield.
Results provide insights into optimizing intercropping ratios and spatial arrangements to mitigate shading effects and enhance resource utilization.
This research contributes to developing sustainable agricultural practices that improve crop productivity through intercropping strategies.