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| Effects of stable nitrogen fertilizer reduction on corn yield, nitrogen use efficiency and soil inorganic nitrogen residue under drip irrigation |
| Received:February 22, 2024 |
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| KeyWord:stable nitrogen fertilizer;corn;yield;nitrogen use efficiency;soil inorganic nitrogen residue |
| Author Name | Affiliation | E-mail | | TANG Yali | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | DUAN Jingjing | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | ZANG Xulong | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | LAI Ning | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | LI Yongfu | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | XIN Huinan | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | LI Na | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | LÜ Caixia | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | | LI Qingjun | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | gyqc@163.com |
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| Abstract: |
| To investigate the differences of fertilizer efficiency and utilization ratio between stable nitrogen fertilizer and common nitrogen fertilizer on corn under drip irrigation in Xinjiang, and to provide technical support for reducing fertilizer application and increasing efficiency and high-quality development of corn fertilizer. Field trials were carried out in Qitai County in northern Xinjiang and Yutian County in southern Xinjiang using the combined methods of sampling, laboratory analysis and biostatistics. We set up 6 treatments, i.e., No nitrogen fertilizer（N0）; Conventional fertilization（FP）; Recommended amount of stable nitrogen fertilizer（NF）, reducing nitrogen by 10% compared to FP; Stable nitrogen fertilizer reduction treatment（90%NF）, reducing nitrogen by 19% compared to FP; Stable nitrogen fertilizer reduction treatment（80%NF）, reducing nitrogen by 28% compared to FP; Stable nitrogen fertilizer reduction treatment（70% NF）, reducing nitrogen by 37% compared to FP. NF treatment significantly increased maize yield compared to the FP treatment, with yield increased by 7.6%（Qitai County）and 11.6%（Yutian County）, nitrogen use efficiency was increased by 3.2 percentage points（Qitai County）and 7.5 percentage points（Yutian County）, significantly reduced soil nitrogen residue and increased incomes. The yield of 90%NF treatment was equivalent to that of FP treatment, but the nitrogen use efficiency was increased by 6.3 percentage points（Qitai County）and 9.2 percentage points（Yutian County）, significantly reduced soil nitrogen residue and increased incomes by 1 143 yuan·hm-2 （Yutian County）. In Qitai County, 80%NF treatment significantly reduced corn yield and economic benefits, while in Yutian County, 80%NF treatment had the same yield as the FP treatment, but reduced the economic benefits. 70%NF treatment significantly reduced corn yield and economic benefits at both sites. In Qitai County, applying stable nitrogen fertilizer with reducing conventional nitrogen application by 10% can increase corn yield, increase nitrogen use efficiency, and net incomes by 7.6%, 3.2 percentage points, and 1 996 yuan·hm-2, respectively; and significantly reduce soil nitrogen residue. In Yutian County, applying stable nitrogen fertilizer with reducing conventional nitrogen application by 10%-19% can still increase corn yield, nitrogen use efficiency, and net income increase by 5.8%- 11.6%, 7.5-9.2 percentage points, and 980-2 378 yuan·hm-2, respectively; and reduce soil nitrogen residue at the same time. |
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