| 不同施氮处理草莓氮素吸收分配及产量差异的研究 |
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| 引用本文： | 彭福田,张青,姜远茂,彭勇,周鹏.不同施氮处理草莓氮素吸收分配及产量差异的研究[J].植物营养与肥料学报,2006,12(3):400-405. |
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| 作者姓名： | 彭福田 张青 姜远茂 彭勇 周鹏 |
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| 作者单位： | 1.山东农业大学园艺科学与工程学院 山东泰安271018 |
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| 摘 要： | 利用稳定性同位素15N示踪技术,研究了施肥时期与施肥量对设施盆栽草莓15N尿素吸收分配的影响。结果表明,15N尿素定植时与花前各半量追施,氮肥利用率最高,达52.5%,花前追肥利用率最低,为34.2%。不同时期施肥,植株收获时氮素在草莓各器官中的分配差异较大,定植时追肥,营养器官分配率为85%,生殖器官15%;定植时和花前各半量追肥时,营养器官分配率为72.2%,生殖器官27.8%;而花前追肥则生殖器官分配率提高到31.3%。15N的吸收分配随着生长中心而转移,生长后期生殖器官对15N的竞争力高于营养器官。增加氮肥施用量,氮肥利用率下降。田间试验表明,氮肥运筹对植株成熟叶片硝态氮浓度与SPAD值有显著影响,设施栽培草莓施N225.kg/hm2,于定植时与花前各半量施用,草莓花芽分化早,早期产量与总产量均高。
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| 关 键 词： | 草莓 氮肥运筹 15N 氮肥利用率 分配 产量 |
| 文章编号： | 1008-505X(2006)03-0400-06 |
| 修稿时间： | 2005年8月1日 |
Effect of nitrogen application on nitrogen absorption, distribution and yield of Strawberry |
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| PENG Fu-tian,ZHANG Qing,JIANG Yuan-mao,PENG Yong,ZHOU Peng.Effect of nitrogen application on nitrogen absorption, distribution and yield of Strawberry[J].Plant Nutrition and Fertilizer Science,2006,12(3):400-405. |
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| Authors: | PENG Fu-tian ZHANG Qing JIANG Yuan-mao PENG Yong ZHOU Peng |
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| Institution: | 1.College of Horticulture Science and Engineering of Shandong Agricultural University.Taian 271018;China |
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| Abstract: | Pot experiments were conducted to examine the effects of nitrogen application time and rate on nitrogen absorption and distribution using labeled(()~(15)N) isotope technique.The treatment applying N at fix planting and before anthesis with half dose got the highest nitrogen utilization rate equivalent to 52.5%;while the nitrogen utilization rate of the treatment applying N before anthesis with full dose was the lowest being 34.2%.The ratio of N-distribution in various organs existed significant difference when fertilizer was applied at different stages.The ratio of N-distribution of nutritive organs to genital organs was 5.7 to 1,while the ratio was 2.6 to 1 when N was top addressed with half dose at fix planting and before anthesis.Top addressing N before anthesis could increase the N distribution rate of genital organ significantly(equivalent) to 31.3%. By all appearances,the absorption and distribution of(()~(15)N) were transfused with the change of organic centre of strawberry.The competition ability of genital organs on(()~(15)N) at the later growing period was higher than nutritive organs.Field test results indicated nitrogen application influenced significantly nitrate concentration and SPAD reading of ripe leaf.Applying N with dose of 225 kg/ha by means of top addressing at fix planting and before anthesis with half dose separately could accelerate blossom buds differentiation and get the highest forepart and total yield of strawberry. |
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| Keywords: | 15N |
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