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中国农学通报

中国农学通报 ›› 2020, Vol. 36 ›› Issue (12): 26-32.doi: 10.11924/j.issn.1000-6850.casb19010020

• 农学·农业基础科学 • 上一篇    下一篇

氮素养分对青稞营养功能特征及籽粒产量的影响

魏斌1,2, 马占琴3   

  1. 1兰州大学草地农业生态系统国家重点实验室,兰州 730000
    2德阳市农业技术推广站,四川德阳 618000
    3阿坝县农业技术推广站,四川阿坝 624000
  • 收稿日期:2019-01-04 修回日期:2019-08-14 出版日期:2020-04-25 发布日期:2020-04-21
  • 作者简介:魏斌,男,1986年出生,四川南充人,农艺师,硕士,主要从事植物营养和土壤肥料的研究与应用。通信地址：618000 四川省德阳市旌阳区亭江街89号,E-mail： weib10@lzu.edu.cn
  • 基金资助:
    四川省科技计划项目“四川省‘藏青2000’青稞品种引种示范项目”(sc2018003231)

Nitrogen Nutrition: Effects on Nutritional Function Characteristics and Grain Yield of Hulless Barley

Wei Bin1,2, Ma Zhanqin3   

  1. 1State Key Laboratory of Grassland Agro-ecosystems, Lanzhou University, Lanzhou 730000
    2Station for Popularizing Agricultural Technique of Deyang, Deyang Sichuan 618000
    3Station for Popularizing Agricultural Technique of Aba, Aba Sichuan 624000
  • Received:2019-01-04 Revised:2019-08-14 Online:2020-04-25 Published:2020-04-21

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摘要：

为确定在不同氮素条件下影响青稞生产力的关键性营养功能特征,以‘藏青2000’为试材,就不同施氮水平对青稞营养功能特征及籽粒产量的影响进行试验研究。结果表明：施氮显著提高了青稞籽粒产量、株高、相对生长率和比叶面积,而降低了单位叶面积根量和叶干物质含量,施氮水平与株高、相对生长率和比叶面积呈正相关关系,与单位叶面积根量和叶干物质含量呈负相关关系。随着施氮强度加大,产量持续提高,但增长速率下降,青稞籽粒产量与施氮水平呈二次曲线关系(y=-171.25x 2+1327.3x+10, R 2=0.958, P小于0.05)。青稞籽粒产量与株高(y=43.026x-2596.6, R 2=0.8994, P小于0.05)、相对生长率(y=7178.7x-150.66, R 2=0.5361, P小于0.05)和比叶面积(y=6.4604x+413.3, R 2=0.4153, P小于0.05)呈显著线性正相关,与叶干物质含量(y=-29.668x+4045.7, R 2=0.4488, P小于0.05)呈线性负相关关系,与单位叶面积根量(y=-2025.4x+2746.4, R 2=0.0579, P大于0.05)无明显相关性。结果表明：青稞的植株高度、相对生长率和比叶面积促进产量增长,叶干物质含量对产量有抑制作用,而单位叶面积根量对产量影响不明显。在本试验条件下,植株高度、相对生长率、比叶面积和叶干物质含量4个功能特征可在物种水平上被认为是影响青稞生产力的标记性特征。

关键词: 氮素养分, 青稞, 营养功能特征, 籽粒产量

Abstract:

To confirm the key nutritional function characteristics affecting the productivity of hulless barley under different nitrogen conditions, taking ‘Zangqing2000’ as the test material, we studied the effects of nitrogen levels on nutritional function characteristics and grain yield. The results showed that: compared with the nitrogen-free treatment, nitrogen application could increase the grain yield, plant height (PH), relative growth rate (RGR) and specific leaf area (SLA) significantly, but decrease the root mass per unit leaf area (RPL) and leaf dry matter content (LDMC); nitrogen application level had a positive correlation with PH, RGR and SLA, and a negative correlation with RPL and LDMC; the grain yield of hulless barley continued to increase, but the growth rate of grain yield decreased with the increase of nitrogen application, so that there was a quadratic curve relationship between grain yield and nitrogen level (y=-171.25x 2+1327.3x+10, R 2=0.958, P小于0.05); meanwhile, there was a significantly positive linear relationship between grain yield and PH (y=43.026x-2596.6, R 2=0.8994, P小于0.05), RGR (y=7178.7x-150.66, R 2=0.5361, P小于0.05), SLA (y=6.4604x+413.3, R 2=0.4153, P小于0.05), but a negative linear relationship between grain yield and LDMC (y=-29.668x+4045.7, R 2=0.4488, P小于0.05), and the grain yield had non-significant correlation with RPL (y=-2025.4x+2746.4, R 2=0.0579, P大于0.05). Those results prove that: the grain yield is promoted by PH, RGR and SLA, and inhibited by LDMC, and has non-significant correlation with RPL. So, the nutritional function characteristics (PH, RGR, SLA and LDMC) could be considered marker features affecting the productivity of hulless barley at the species level.

Key words: nitrogen nutrition, hulless barley, nutritional function characteristics, grain yield

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