| 不同供氮水平下幼龄苹果园氮素去向初探 |
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| 引用本文： | 葛顺峰,姜远茂,魏绍冲,房祥吉. 不同供氮水平下幼龄苹果园氮素去向初探[J]. 植物营养与肥料学报, 2011, 17(4): 949-955. DOI: 10.11674/zwyf.2011.0543 |
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| 作者姓名： | 葛顺峰 姜远茂 魏绍冲 房祥吉 |
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| 作者单位： | 1.山东农业大学作物生物学国家重点实验室 |
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| 基金项目： | 现代农业产业技术体系建设专项(CARS-28); 公益性行业(农业)科研专项(201103003); 山东省农业重大应用创新课题(201009)资助 |
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| 摘 要： | 以2年生红富士/平邑甜茶为试材，采用田间小区和15N微区相结合，研究了不同供氮水平下幼龄苹果园氮素去向。结果表明，施用氮肥显著增加了植株生物量和吸氮量，而氮肥利用率随施氮量的增加显著降低；N75、N150和N225的氮肥利用率分别为31.28%、22.95%和19.38%。土壤残留氮量随施氮量的增加而显著增大，且残留氮素主要分布于060 cm土层，深层渗漏量很小。整个作物土壤体系氮素回收率随施肥量的增加显著降低，损失率显著增高。N75处理的氮素回收率为60.41%，显著高于N150（46.41%）和N225处理（40.88%）；且损失率最低（39.59%），显著低于其它两个处理。氨挥发损失随施氮量的增加显著升高，N2O损失量各处理间无明显差异；氮素损失中氨挥发和N2O损失所占比例较低，较多的氮素通过反硝化和径流等途径损失。
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| 关 键 词： | 幼龄苹果园 供氮水平 氮素去向 氮素损失 |
| 收稿时间： | 2010-12-22 |
Nitrogen balance under different nitrogen application rates in young apple orchards |
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| GE Shun-feng,JIANG Yuan-mao,WEI Shao-chong,FANG Xiang-ji. Nitrogen balance under different nitrogen application rates in young apple orchards[J]. Plant Nutrition and Fertilizer Science, 2011, 17(4): 949-955. DOI: 10.11674/zwyf.2011.0543 |
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| Authors: | GE Shun-feng JIANG Yuan-mao WEI Shao-chong FANG Xiang-ji |
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| Affiliation: | 1.State Key Laboratory of Crop Biology,College of Horticulture Science and Engineering,Shandong Agricultural University,Taian Shandong 271018,China |
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| Abstract: | A field and a microplot experiment were conducted at the same time combined to study nitrogen(N) balance under different N application rates by using two-year-old 'Fuji'apple trees(M.domestica Borkh.cv.Red Fuji/M.hupenensis Rhed) in young apple orchards.The results show that the biomass and N uptake capacity of apple trees are increased significantly under the application of nitrogen fertilizer,and the nitrogen use efficiency(NUE) is decreased significantly with increase of N application rates.NUEs of the N... |
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| Keywords: | young apple orchard N levels fate of nitrogen nitrogen loss |
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