| 不同施氮量对旱地不同品种冬小麦氮素累积、运输和分配的影响 |
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| 引用本文： | 赵满兴,周建斌,杨绒,郑险峰,翟丙年,李生秀. 不同施氮量对旱地不同品种冬小麦氮素累积、运输和分配的影响[J]. 植物营养与肥料学报, 2006, 12(2): 143-149. DOI: 10.11674/zwyf.2006.0201 |
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| 作者姓名： | 赵满兴 周建斌 杨绒 郑险峰 翟丙年 李生秀 |
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| 作者单位： | 1.西北农林科技大学资源环境学院 陕西杨凌712100 |
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| 基金项目： | 中国科学院资助项目;国家科技攻关项目 |
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| 摘 要： | 通过田间试验研究了西北旱地4个主要冬小麦品种在不同供氮水平下对氮素的吸收、累积和转移特性。结果表明,增施氮肥显著地促进了小麦地上部分氮素累积总量,子粒氮素累积量在施氮量180.kg/hm2时最高,再增加氮肥用量子粒氮素累积量降低;施氮明显增加了收获时茎秆氮素的残留量。不同品种间氮素累积量差异显著,其中小偃22最高,其后依次为陕253、小偃503和陕229;小偃22的氮肥利用率、氮肥农学效率和氮肥生理效率均高于其它几个小麦品种。不同器官相比,开花前氮素主要累积在叶片中,茎秆的累积量在开花期达到最大。不同部位氮素转移效率为叶片穗茎秆;叶、茎、穗氮素转移效率存在基因型差异。
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| 关 键 词： | 冬小麦 旱地 氮肥 氮素吸收与转移 |
| 文章编号： | 1008-505X(2006)02-0143-07 |
| 收稿时间： | 2004-12-13 |
| 修稿时间： | 2004-12-13 |
Characteristics of nitrogen accumulation, distribution and translocation in winter wheat on dryland |
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| ZHAO Man-xing,ZHOU Jian-bin,YANG Rong,ZHENG Xian-feng,ZHAI Bing-nian,LI Sheng-xiu. Characteristics of nitrogen accumulation, distribution and translocation in winter wheat on dryland[J]. Plant Nutrition and Fertilizer Science, 2006, 12(2): 143-149. DOI: 10.11674/zwyf.2006.0201 |
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| Authors: | ZHAO Man-xing ZHOU Jian-bin YANG Rong ZHENG Xian-feng ZHAI Bing-nian LI Sheng-xiu |
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| Affiliation: | 1.College of Resource and Environment Sciences;Northwest Agric.and For.University;Yangling;Shaanxi 712100;China |
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| Abstract: | A field experiment was carried out to study the uptake,accumulation and translocation of nitrogen of four winter wheat varieties at different N-levels on the dryland.This experiment was designed using a split-plot design.5 levels of nitrogen fertilizers were the main plots and 4 varieties were the subplots.The application rate of nitrogen fertilizer was 0,60,120,180 and 300 kg/ha,respectively;and the varieties was Shaan 253(V1),Shaan 229(V2),Xiaoyan 503(V3) and Xiaoyan 22(V4).The results showed that the highest N uptake in the growth period occurred from reviving stage to anthesis stage.The nitrogen accumulation rate,which had significant differences between different varieties,increased as N rate increased.When the rate of N fertilizer was higher than 180 kg/ha,grain yield was decreased with the increase of N rate,indicating plant receiving the luxury N uptake.The nitrogen accumulation of Xiaoyan 22 variety was the highest,followed with Shaan 253,Xiaoyan 503 and Shaan 229.The proportion of N accumulated in leaf and stem was high before the anthesis stage;and the accumulated N rate in stem reached peak at the anthesis stage.The residual N in leaf and stem at the maturing stage showed an obvious upward trend with the increasing N rate.The highest N accumulation of wheat grain took place at the N rate of 180 kg/ha.The N transportation efficiency of different organs during grain filling stage ranked in the following order,leaf>spike>stem.Different varieties had various N use efficiency.Compared to other varieties,Xiaoyan 22 had higher N recovery,N agronomic efficiency and N physiological efficiency.This showed that Xiaoyan 22 had a high efficiency of N uptake,translocation and utilization. |
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| Keywords: | winter wheat dryland nitrogen fertilizer nitrogen uptake and translocation |
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