磷肥用量对甜玉米磷素吸收利用的影响 |
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摘 要: |
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收稿时间: | 2020-03-06 |
Effects of phosphorus application on phosphorus uptake and utilization of sweet corn |
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Authors: | YAN Xiao-Jun YE De-Lian SU Da LI Fang ZHENG Chao-Yuan WU Liang-Quan |
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Institution: | 1.College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China;2.International Magnesium Institute / Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China;3.College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China |
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Abstract: | Understanding the phosphorus (P) absorption mechanism is the premise for high P utilization and high crop yield. In this study, the effects of different P rates (0, 37.5, 75, 150, and 300 kg hm-2, expressed as P0, P1, P2, P3, and P4, respectively) on sweet corn yield, biomass and P accumulation and tissue distribution, P transportation and P utilization were studied using a two-year P gradient positioning field experiment. Our results showed that P application significantly increased the fresh ear yield of sweet corn, but the yield difference among different P application rates (P1-P4) was not significant from 2018 to 2019 compared with P0 treatment. P application significantly increased the biomass and P accumulation of sweet corn plants at jointing, silking and fresh eating stages, respectively. In addition, P accumulation in grain was not significant different, which accounting for 42% of plant P accumulation. With P application, the contribution rate of P assimilation to the ear P accumulation was 57.3%-93.0% after anthesis, while the fresh ear yield per P accumulation, P physiological efficiency, agronomic efficiency, recovery efficiency and partial productivity decreased with P rates. Considering the yield and utilization efficiency of phosphate fertilizer, the supply of 37.5 kg hm-2 of phosphate fertilizer can meet the needs of high yield and efficient utilization of phosphate fertilizer in sweet corn in this experiment. |
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Keywords: | sweet corn phosphorus application rate yield phosphorus utilization |
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