浙江农业学报 ›› 2016, Vol. 28 ›› Issue (9): 1454-1461.DOI: 10.3969/j.issn.1004-1524.2016.09.02

• 作物科学 • 上一篇    下一篇

施氮量对马铃薯氮素积累及功能叶片生理特性的影响

何彩莲1, 郑顺林1, *, 王沛裴1, 赵婷婷1, 袁继超1, 何卫2   

  1. 1.四川农业大学 农学院,四川 成都 611130;
    2.西南地区作物栽培重点实验室,四川 成都 611130
  • 收稿日期:2015-12-30 出版日期:2016-09-15 发布日期:2016-11-23
  • 通讯作者: 郑顺林,E-mail: zhengshunlin123@163.com
  • 作者简介:何彩莲(1991—),女,四川达州人,硕士研究生,研究方向为马铃薯高产栽培技术。E-mail: hecailian818041@163.com
  • 基金资助:
    国家科技支撑计划(2012BAD06B0407); 四川省育种攻关配套项目(2011NZ0098-15-5)

Effect of nitrogen application rate on nitrogen accumulation and physiological characteristics of functional leaf in potato

HE Cai-lian1, ZHENG Shun-lin1, *, WANG Pei-pei1, ZHAO Ting-ting1, YUAN Ji-chao1, HE Wei2   

  1. 1. College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China;
    2. Key Laboratory of Southwest Crop Cultivation, Chengdu 611130, China
  • Received:2015-12-30 Online:2016-09-15 Published:2016-11-23

摘要: 为探讨不同季节马铃薯氮素高效利用的相关机理,指导不同季节马铃薯的氮肥运筹,提高氮肥施用效率。通过春、秋季盆栽试验,比较6个施氮水平下春、秋马铃薯氮素积累及功能叶片生理特性的差异。结果表明:(1)随施氮量的增加,春马铃薯硝态氮含量增加,秋马铃薯则先增后减;春、秋马铃薯硝酸还原酶活性均随施氮量增加呈现先增后减。同等肥力下,块茎形成期与块茎成熟期春马铃薯的硝酸还原酶活性峰值比秋马铃薯分别高出35.3%、74.0%。(2)春、秋马铃薯植株氮含量、氮素积累量随施氮量的增加而增加;同一生育时期同等肥力下,春马铃薯植株氮含量、氮素积累量均高于秋马铃薯。(3)生理指标中叶片硝态氮与植株氮含量相关系数较高。

关键词: 马铃薯, 施氮水平, 硝态氮, 硝酸还原酶, 氮素积累

Abstract: Study on the mechanism of high efficiently utilizing nitrogen of potatoes in different seasons could direct the application of nitrogen fertilizer and promote the utilization efficiency of nitrogen fertilizer. Through pot culture experiment in spring and autumn, the differences of nitrogen accumulation and physiological property of function potato leaves in six nitrogen levels were studied. The results could be summarized as follows: (1) With the increasing rate of nitrogen applied, the nitrate nitrogen content of spring potatoes increased, but that of autumn potatoes decreased after first increase. And the nitrate reductase (NR) activity of potatoes both in spring and autumn increased first and then decreased. Under the same nitrogen level, the peak value of NR activity of spring potatoes in tuber formation and maturity stages were 35.3% and 74.0% higher than those in autumn. (2) The nitrogen content and nitrogen accumulation of potato plants both in spring and autumn increased with the inceasing nitrogen fertilizer. But these two indicators of potatoes in spring were both higher than those in autumn under the same growth period and nitrogen levels. (3) There was a higher correlation coefficient between the nitrate nitrogen content and the total nitrogen content in potato plants, which could induct the effective utilization of nitrogen.

Key words: potatoe, nitrogen fertilizer level, nitrate nitrogen, nitrate reductase, nitrogen accumulation

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