| 氮肥运筹对滴灌甜菜产量、氮素吸收和氮素平衡的影响 |
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| 引用本文： | 苏继霞,王开勇,费聪,李阳阳,樊华.氮肥运筹对滴灌甜菜产量、氮素吸收和氮素平衡的影响[J].土壤通报,2016(6):1404-1408. |
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| 作者姓名： | 苏继霞 王开勇 费聪 李阳阳 樊华 |
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| 作者单位： | 石河子大学农学院,新疆石河子,832003 |
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| 基金项目： | 国家自然科学基金资助项目(31260299)，教育部科学技术研究重点项目(212201)，新疆生产建设兵团博士基金项目(2014BB012)，石河子大学杰出青年科技人才培育计划(2015ZRKXJQ03) |
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| 摘 要： | 以甜菜品种"Beta356"为材料,研究了氮素运筹甜菜叶丛快速增长期、块根膨大期和糖分积累期的氮素追施比例分别为6∶3∶1、5∶3∶2、4∶4∶2(用N1、N2、N3表示),不施氮素的处理为对照(用CK表示)]对滴灌甜菜产量、氮素吸收和氮素平衡的影响。结果表明:各处理甜菜产糖量为N3N2N1CK,氮素运筹间差异不显著。与N1处理相比,适当降低叶丛快速生长期的氮素施用比例,有利于提高氮肥表观利用率和氮肥表观残留率,降低氮肥表观损失率。其中N2处理的氮肥表观利用率和氮肥表观残留率分别比N1和N3处理提高了-3.00%和22.00%,108.22%和-0.14%,N2处理的氮肥表观损失率分别比N1和N3处理降低了262.40%和65.25%。综合考虑产量、氮素利用和氮素平衡认为,N2处理具有较高经济效益和环境效益,是北疆滴灌甜菜合理氮素运筹模式。
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| 关 键 词： | 甜菜 氮肥运筹 氮素吸收 氮素平衡 |
Effects of Nitrogen Management on Sugar Beet Yield,Nitrogen Uptake and Soil Nitrogen Balance under Drip Irrigation |
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| Abstract: | The experiment was conducted to study the effects of nitrogen (N) management on sugar beet yield,N uptake and soil N balance under drip irrigation.The application ratio of N fertilizer at rapid growth,expanding,and topdressing stages,respectively,was 6 ∶ 3 ∶ 1,5 ∶ 3 ∶ 2,4 ∶ 4 ∶ 2 (represented with N1,N2,N3,respectively),and no application of N fertilizer (CK) was set as control treatment.The results showed that sugar content reduced in the order of N3 ＞ N2 ＞ N1 ＞ CK,but was not significantly affected by N management.Compared with N1 treatment,the appropriate decrease in the application rate of N fertilizer at leaf rapid growth stage improved apparent N recovery rate and apparent N residue rate,and reduced apparent N loss rate.The apparent N recovery rate and the apparent N residue rate in N2 treatment were-3.00％ and 22.00％,108.22％ and-0.14％ higher than that in N1 and N3 treatments,respectively.The apparent N loss rates in N2 treatment were 262.40％ and 65.25％ lower than that in N1 and N3 treatment,respectively.Considering yield,N utilization and balance,N2 treatment had higher economic and environmental benefits and can be used as the reasonable N management mode of sugar beet under drip irrigation in the north of Xinjiang. |
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| Keywords: | Sugar beet Nitrogen fertilizer application Nitrogen uptake Soil nitrogen balance |
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