Yield effects and phosphorus utilization efficiency of summer maize at different phosphorus application positions
Journal Title: Journal of Henan Agricultural University - Year 2023, Vol 57, Issue 6
Abstract
[Objective] To clarify the yield effect and phosphorus (P) utilization efficiency characteristics of summer maize based on the positive point hole P fertilizer application methodology, and thus to provide a theoretical basis for scientific P application for summer maize. [Method] Field experiments were conducted in Yuanyang County and Hebi City, Henan Province in 2020 and 2021 growing seasons. The tested summer maize variety is ‘Xundan 1618’. The effects of without P fertilizer application (CK), ditching strip P fertilizer application (TS), hole P fertilizer application between plants (ZJ), and positive point hole P fertilizer application (ZW) on the grain yield, nutrient absorption and utilization and phosphorus fertilizer use efficiency were analyzed and studied. [Result] The yield of summer maize increased by 8.64%-26.18% for different P application positions treatments. The optimal treatment was ZW for both the Yuanyang and Hebi sites, with the average yield of 8 506 kg·hm-2 and 10 583 kg·hm-2, and an average increase rate of 21.30% and 18.00%, respectively. Compared with the TS treatment, the average increase rates for the yield, aboveground biomass and the aboveground P accumulation at mature stage were 9.27%, 18.08% and 9.43%, respectively, at Yuanyang county based on the ZW treatment. And the Hebi city was 7.26%, 8.25% and 9.11%, respectively. Moreover, the average utilization rate of P fertilizer in ZW treatment was 27.20% and 26.64%, respectively, and the average agronomic efficiency was 24.90 and 26.90 kg·kg-1, respectively. Compared with the TS treatment, the ZW treatment increased the utilization rate of P fertilizer by 5.78 and 5.68 percentage points and increased the agronomic efficiency by 12.03 and 11.94 kg·kg-1. [Conclusion] The hole P fertilizer application methodology can improve the above-ground biomass and grain yield of summer maize. Considering the yield, and absorption and utilization efficiency of P characteristics, ZW was the recommended P treatments for summer maize based on this experiment, which can be used as a high-yield and efficient P application technology for summer maize.
Authors and Affiliations
Li REN, Bengao HAN, Lantao LI, Yuhong MIAO, Yilun WANG
Keywords
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- EP ID EP769273
- DOI 10.16445/j.cnki.1000-2340.20231103.001
- Views 74
- Downloads 0
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