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| Effects of phosphorus reduction and organic substitution on yield, quality, and soil fertility of open-field pepper |
| Received:June 08, 2023 |
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| KeyWord:phosphorus fertilizer reduction;organic fertilizer substitution;open-field pepper;yield and quality;soil fertility |
| Author Name | Affiliation | E-mail | | LIAO Guangcheng | Institute of Agricultural Chemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310012, China | | | CHEN Xiaoping | Agricultural Technology Extension Station of Tiantai County, Zhejiang Province, Taizhou 317200, China | | | YU Yeying | Agricultural Technology Extension Station of Tiantai County, Zhejiang Province, Taizhou 317200, China | | | CAO Xuexian | Agricultural Technology Extension Station of Tiantai County, Zhejiang Province, Taizhou 317200, China | | | CHEN Wenwei | Agricultural Technology Extension Station of Tiantai County, Zhejiang Province, Taizhou 317200, China | | | WANG Yuanfan | Institute of Agricultural Chemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310012, China | | | GAO Wenzhe | Institute of Agricultural Chemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310012, China | | | LI Tingqiang | Institute of Agricultural Chemistry, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310012, China | litq@zju.edu.cn |
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| Abstract: |
| To develop a scheme for reducing chemical fertilizer and improving efficiency in open-field pepper-producing areas, under the backdrop of long-term high nitrogen and phosphorus input in Zhejiang Province, this study investigated the effects of reducing chemical phosphorus fertilizer and replacing it with organic fertilizer on open-field pepper yield, quality, and soil fertility in a field experiment. The experiment utilized "Xiaoxin series" pepper as the primary material, and included five treatments:no fertilizer as control(CK), conventional fertilizer(CF), 30% chemical phosphorus fertilizer reduction(OF), 30% chemical phosphorus fertilizer reduction + organic fertilizer substitution for 15% nitrogen of chemical fertilizer(OF-15N), and 30% chemical phosphorus fertilizer reduction + organic fertilizer substitution for 30% nitrogen of chemical fertilizer(OF-30N). The results demonstrated that:The yield in OF, OF-15N and OF-30N treatments increased by 3.20%, 14.59%, and 12.21%, respectively, compared with the CF treatment, and the benefit after deducting fertilizer cost increased by 3.37%, 15.21%, and 12.84%, respectively; The sugar-acid ratio of open-field pepper grown under OF, OF-15N, and OF-30N treatments increased by approximately 0.50-2.28 relative to the CF treatment, leading to improved nutritional quality indices of soluble sugar and sugar-acid ratio, particularly in terms of the increased content of minor and trace elements, including calcium, magnesium, iron, and zinc; Consequently, the open-field pepper yield and quality in OF-15N and OF-30N treatments were apparently higher than in OF treatment; Soil pH value, soil organic matter, and total nitrogen increased to varying degrees in OF, OF-15N, and the OF-30N treatments compared to thee CF treatment, while no significant decrease in soil available phosphorus supply capacity was observed; The soil comprehensive fertility index(IFI) observed in the OF-15N and OF-30N treatments was increased, but it was slightly decreased in the OF, CF, and CK treatments when compared with the pre-experiment treatment. The OF-30N treatment showed greater improvement than OF-15N. In summary, based on a 30% reduction in chemical phosphorus fertilizer, organic fertilizer substitution for 30% nitrogen of chemical fertilizer(OF-30N) treatment has a prominent effect on improving the yield, quality, and soil fertility of open-field pepper. It could be a viable scheme for reducing chemical fertilizer and improving efficiency. |
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