草地学报

草地学报 ›› 2020, Vol. 28 ›› Issue (4): 1015-1023.DOI: 10.11733/j.issn.1007-0435.2020.04.019

• 研究论文 • 上一篇    下一篇

外源激素与磷素配施对老芒麦生长特性及营养品质的影响

杨航, 祁娟, 李玉英, 刘艳君, 吴召林, 金鑫   

  1. 甘肃农业大学草业学院, 草业生态系统教育部重点实验室, 甘肃省草业工程实验室, 中-美草地畜牧业 可持续研究中心, 甘肃 兰州 730070
  • 收稿日期:2020-03-09 修回日期:2020-04-07 出版日期:2020-08-15 发布日期:2020-07-28
  • 通讯作者: 祁娟
  • 作者简介:杨航(1997-),男,甘肃西和人,硕士研究生,研究方向为草地资源与植物生理生态,E-mail:1468896351@qq.com
  • 基金资助:
    国家自然科学基金（31660684）；国家牧草产业技术体系（CARS-34）；青海省科技厅重点实验室发展专项（2020-ZJ-Y03）共同资助

Effects of Different Ratio of Exogenous Hormones and Phosphate on the Growth and Nutritional Quality of Elymus sibiricus L.

YANG Hang, QI Juan, LI Yu-ying, LIU Yan-jun, WU Zhao-lin, JIN Xin   

  1. College of Grassland Science, Gansu Agricultural University;Key Laboratory of Grassland Ecosystem, Ministry of Education;Gansu Grassland Engineering Laboratory;China-US Center for Grazing Land Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China
  • Received:2020-03-09 Revised:2020-04-07 Online:2020-08-15 Published:2020-07-28

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摘要： 以来自青藏高原高寒草地野生老芒麦（Elymus sibiricus L.）种子为试验材料，采用营养砂培法，研究了根部施用不同体积（0，3，5，7，10 mL）磷素（NaH2PO4，200 g·L-1）溶液搭配叶面喷施不同体积（10，7，5，3，0 mL）外源激素6-苄氨基嘌呤（6-BA，20 mg·L-1）和吲哚乙酸（IAA，30 mg·L-1）对老芒麦生长特性及营养品质的影响，旨在为外源激素和磷素的互作效应以及老芒麦人工草地建植技术提供理论依据。试验结果表明：在7 mL NaH2PO4+3 mL 6-BA（PB7+3）和7 mL NaH2PO4+3 mL IAA（PI7+3）处理下，地上干重较对照分别增加33%和26%；粗蛋白含量在10 mL NaH2PO4+0 mL 6-BA（PB10+0）、10 mL NaH2PO4+0 mL IAA（PI10+0）处理下较对照各增加了24%；酸性洗涤纤维（ADF）含量在5 mL NaH2PO4+5 mL IAA（PI5+5）处理下较对照降低了4%，老芒麦磷含量在5 mL NaH2PO4+5 mL 6-BA（PB5+5）和3 mL NaH2PO4+7 mL IAA（PI3+7）处理下较对照分别增加了46%和50%。经灰色关联度对地上干重和营养品质综合分析表明，P素与6-BA和IAA配施可以提高老芒麦生长特性和营养品质，其中在5 mL NaH2PO4+5 mL 6-BA（PB5+5）处理下配施效果较佳，本试验结果可为外源激素和磷素的互作效应以及老芒麦人工草地建植技术提供理论依据。

关键词: 老芒麦, 磷素, 外源激素(6-BA、IAA), 配施, 生长特性, 营养品质

Abstract: To understand the effect of phosphorus (NaH2PO4) and two exogenous hormones (6-BA and IAA) on the vegetative growth and nutritional quality of Elymus sibiricus L.,different volumes (0,3,5,7,10 mL) of phosphate (NaH2PO4,200 g·L-1) were applied to the roots of Elymus sibiricus L.,and different volumes (10,7,5,3,0 mL) of the N-(Pheny-lmethyl)-9H-purin-6-amine (6-BA,20 mg·L-1) and indole-3-acetic acid (IAA,30 mg·L-1) were sprayed on the leaves of E. sibiricus L.. The total volume applied is 10 mL. The wild E. sibiricus seeds collected in the alpine grassland of Qinghai-Tibet Plateau were planted in the sand culture with nutrient solutions. The experiment design had 10 treatments,which were PB0+10,PB3+7,PB5+5,PB7+3,PB10+0,PI0+10,PI3+7,PI5+5,PI7+3,PI10+0,and CK of distilled water. The results showed that the aboveground dry weight treated with 7 mL NaH2PO4+3 mL 6-BA (PB7+3) and 7 mL NaH2PO4+3 mL IAA (PI7+3) increased by 33% and 26% compared with the control,respectively. The crude protein content of E. sibiricus L. were both improved by 24% under treatments of 10 mL NaH2PO4+0 mL 6-BA (PB10+0) and 10 mL NaH2PO4+0 mL IAA (PI10+0). The content of ADF was reduced by 4% compared with the control group under the 5 mL NaH2PO4+5 mL IAA (PI5+5) treatment,and the content of phosphorus increased by 46% and 50% under treatments of 5 mL NaH2PO4+5 mL 6-BA(PB5+5) and 3 mL NaH2PO4+7 mL IAA (PI3+7),respectively. Through the comprehensive analysis of grey correlation to dry weight and nutrient quality,it was found that the different ratios of phosphorus with 6-BA and IAA could promote the growth of E. sibiricus L. and improve its nutritional quality,and the effect of 5 mL NaH2PO4+5 mL 6-BA (PB5+5) treatments was the best. The results of this experiment provide a theoretical basis for the combination use of phosphorus and hormone and for the artificial grassland construction technology of E. sibiricus.

Key words: Elymus sibiricus L., Phosphorus, Exogenous hormone, Ratio, Vegetative growth, Nutritional quality

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