Drip Fertigation Improves Maize Yield, Resource Utilization, and Economic Benefits by Increasing Light Interception Under Dense Planting in Southwest China

作者：Li Song, Guangzhou Liu, Yunshan Yang, Xiaoxia Guo, Hua Zhang, Tingqi Lu, Chunyan Qing, Dan Hu, Shaokun Li, Peng Hou · 发表于：Food and Energy Security · 年份：2024 · DOI：10.1002/fes3.70022 · 被引用次数：11 · 研究领域：Crop Yield and Soil Fertility、Irrigation Practices and Water Management、Rice Cultivation and Yield Improvement

ABSTRACT Seasonal drought and traditional water‐fertilizer management limit the increase in the grain yield of summer maize in Southwest China. Drip fertigation mode (HM) can effectively improve crop yields. However, research on drip fertigation has not been conducted in Southwest China. A 2‐year field experiment about HM was carried out with the traditional water‐fertilizer management mode (FM) as control. The plant densities were 5.25 × 10 4 plants ha −1 and 8.25 × 10 4 plants ha −1 in 2022 and 6.00 × 10 4 plants ha −1 and 9.00 × 10 4 plants ha −1 in 2023. The effects of HM on the aboveground biomass, leaf area index, yield, and resource utilization rate of summer maize were studied. Compared with the FM treatment, the HM treatment significantly increased the yield (25.18%), aboveground biomass (25.58%), leaf area index (34.87%), and leaf area duration (29.60%). HM optimized the canopy structure with an 11.05% improvement in light transmission at the top and a significant 61.32% increase in cumulative light radiation interception per unit area at the bottom of the canopy. The nitrogen partial factor productivity (NPFP), radiation utilization efficiency (RUE), heat utilization efficiency (HUE), and economic benefits of the HM treatment significantly increased by 39.58%, 49.45%, 25.92%, and 32.53%, respectively. In addition, dense planting increased the irrigation water use efficiency (IWUE) by 14.25%. In summary, drip irrigation combined with water and fertilizer can signifi...