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王亚妮,孙 韬.盐碱胁迫下小麦幼苗对施氮水平的生长、生理响应[J].麦类作物学报,2022,(2):220
盐碱胁迫下小麦幼苗对施氮水平的生长、生理响应
Growth and Physiological Response of Wheat Seedling to Nitrogen Application under Saline-Alkali Stress
  
DOI:10.7606/j.issn.1009-1041.2022.02.11
中文关键词:  小麦  盐碱胁迫  氮肥  生长特性  生理响应
英文关键词:Wheat  Saline-alkali stress  Nitrogen fertilizer  Growth characteristics  Physiological response
基金项目:国家现代农业产业技术体系建设专项(CARS-03-01-24)
作者单位
王亚妮,孙 韬 (1.山西运城农业职业技术学院山西运城 0440002.山西农业大学农学院山西太谷 030801) 
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中文摘要:
      为了解盐碱土壤上施氮对小麦幼苗生长、生理的调节作用,选取山东省东营市的滨海盐碱土作为栽培介质,采用盆栽试验,以小麦品种济麦22和山农28号为对象,设置0、0.1、0.2和0.3 g·kg-1土4个施氮水平,分析了在盐碱胁迫条件下施氮对小麦幼苗的生长、养分积累、谷氨酰胺合成酶(GS)活性、可溶性蛋白(SP)含量的影响。结果表明,施用氮肥显著缓解了盐碱胁迫对小麦生长的抑制作用。随着施氮水平的提高,两个品种的植株高度、干重及氮、磷、钾积累量均呈上升趋势,其中中、高氮处理(0.2和0.3 g·kg-1土)下这五个指标较较不施氮处理增幅分别为12%~37%、43%~118%、94%~176%、12%~83%和51%~111%,与不施氮处理差异均显著。中、高氮处理均显著提高了济麦22叶片GS活性、SP含量,增幅分别为28%~33%和32%~63%;而施氮处理均显著提高山农28号的GS活性,但对SP含量均无显著影响。这说明施氮可促进盐碱胁迫下小麦幼苗生长和养分积累,有利于其生理代谢,进而缓解盐碱胁迫的不利影响。
英文摘要:
      In order to understand the effect of nitrogen application on the growth and physiology of wheat seedlings in saline-alkali soil,the coastal saline alkali soil in Dongying City,Shandong Province was selected as the cultivation medium. A pot experiment was conducted to set four nitrogen application levels of 0,0.1,0.2 and 0.3 g·kg-1 soil with two wheat varieties Jimai 22 and Shannong 28 as materials. The effects of nitrogen application level on the growth and physiology of wheat seedlings,nutrient accumulation,glutamine synthetase (GS) activity and soluble protein (SP) contentunder saline-alkali stress were analyzed. The results showed that the application of nitrogen fertilizer significantly alleviated the inhibition of saline-alkali stress on wheat growth. With the increase of nitrogen application level,the plant height,dry weight and the accumulation of nitrogen,phosphorus and potassium of the two wheat varieties showed an upward trend. Under the medium and high nitrogen application level (0.2 and 0.3 g·kg-1 soil),the increase rates of these five indices were 12%-37%,43%-118%,94%-176%,12%-83% and 51%-111%,respectively. The activities of GS and SP content in Jimai 22 leaves were significantly increased by 28%-33% and 32%-63%,respectively. Nitrogen application significantly increased GS activity of Shannong 28,but had no significant effect on SP content. Nitrogen application can promote the growth and nutrient accumulation of wheat seedlings under saline-alkali stress,which is conducive to their physiological metabolism,and thus alleviate the adverse effects of saline-alkali stress.
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