| 用15N研究吉林黑土春玉米对氮肥的吸收利用 |
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| 引用本文： | 李伟波,李运东,王辉. 用15N研究吉林黑土春玉米对氮肥的吸收利用[J]. 土壤学报, 2001, 38(4): 476-482 |
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| 作者姓名： | 李伟波 李运东 王辉 |
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| 作者单位： | 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | "九五"国家科技攻关重点项目"玉米大面积高产综合配套技术研究开发与示范"中的招标课题:"玉米高产施肥与提高化肥利用率技术"研究结果之一(吉科合字第95-001-003招标03) |
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| 摘 要： | 用1 5N示踪技术在吉林省中部黑土地区进行田间微区试验 ,研究不同氮肥追施深度与次数对氮肥利用率的影响。结果表明 ,两次深追肥处理 ( 1 0～ 1 5cm)比当地传统的垄上一次浅追肥处理 ,肥料氮的利用率从 2 4 5 %提高到 39 0 % ,氮肥深施并增加追肥次数能有效地提高利用率 ;肥料氮的总损失为 1 6%～ 2 7% ,土壤残留率为 34%～ 5 4 % ;吸收的标记肥料氮中有 1 /2是在 8月 1日以后籽粒形成期被玉米吸收利用的 ;氮肥损失的 70 %～ 90 %是在追肥以后 35天期间发生的 ;施肥的激发效应较弱
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| 关 键 词： | 春玉米 高产施肥 15N 氮肥的利用率 |
| 收稿时间： | 2000-09-23 |
| 修稿时间： | 2000-09-23 |
APPLICATION AND RECOVERY OF 15N-FERTILIZER FOR SPRING MAIZE IN BLACK SOIL OF JILIN |
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| Li Wei-bo,Li Yun-dong and Wang Hui. APPLICATION AND RECOVERY OF 15N-FERTILIZER FOR SPRING MAIZE IN BLACK SOIL OF JILIN[J]. Acta Pedologica Sinica, 2001, 38(4): 476-482 |
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| Authors: | Li Wei-bo Li Yun-dong Wang Hui |
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| Affiliation: | Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008;Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008;Institute of Soil Science, The Chinese Academy of Sciences, Nanjing 210008 |
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| Abstract: | In central Jilin a 15N micro-plot experiment was conducted in a piece of farmland of black soil to study ef ect of the depth and frequency of N application on utilization rate of N fertilizer.Results show that the treatment of sidedressing twice at a depth of 10~15cm increased the rate from 24.5% in the CK,the traditional once for all shallow sidedressing on the ridge,to 39.0%,clearly indicating that deep and split application of N fert ilizer improves utilization rate.The total fertilizer N loss was 16%~27%;N residual in the soil 34%~54%;about half of the 15N labeled fertilizer was taken up by maize during the grain-forming period after Aug.1;70%~90% of the loss occurred within the 35 days after the N fertilizer was sidedressed;and crop response to the application was not significant. |
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| Keywords: | Spring maize Higher yield 15 N N fertilizer utilization rate |
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