光氮互作对芹菜幼苗生长及生理特性的影响
投稿时间:2020-05-28    点此下载全文
引用本文:苗妍秀,蔡润,高星星,李斌,侯雷平.光氮互作对芹菜幼苗生长及生理特性的影响[J].中国农业大学学报,2020,25(10):77-88
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作者单位E-mail
苗妍秀 山西农业大学 园艺学院(部), 山西 晋中 030801
山西省设施蔬菜提质增效协同创新中心, 山西 晋中 030801 
miaoyanxiu@163.com 
蔡润 山西农业大学 园艺学院(部), 山西 晋中 030801  
高星星 山西农业大学 园艺学院(部), 山西 晋中 030801  
李斌 山西农业大学 园艺学院(部), 山西 晋中 030801
山西省设施蔬菜提质增效协同创新中心, 山西 晋中 030801 
 
侯雷平 山西农业大学 园艺学院(部), 山西 晋中 030801
山西省设施蔬菜提质增效协同创新中心, 山西 晋中 030801 
sxndhlp@126.com 
基金项目:山西省重点研发计划重点项目子课题(201703D211001-04-03);山西省高等学校科技创新项目(2019L0382);山西农业大学博士科研启动项目(2016YJ08)
中文摘要:光质和施氮量是影响芹菜生长发育的关键因素,适宜的光氮组合能有效提升芹菜幼苗质量。为优化芹菜工厂化育苗,本试验设置2种光质(白光,W;蓝光,B)和2种施氮量(8 mmol/L KNO3,高氮,H;4 mmol/L KNO3,低氮,L),以WH为对照,研究光氮互作对芹菜幼苗生长、生理代谢和元素积累的影响。结果表明:与WH相比,WL和BH处理的芹菜全株干重分别显著减少43.18%和55.07%,WL处理的叶片和叶柄中硝酸盐、可溶性蛋白质和总游离氨基酸质量分数均显著降低,BH处理的叶片和叶柄中硝酸盐、可溶性蛋白质和矿质元素质量分数显著增加,而叶片中可溶性糖、丙氨酸族和丝氨酸族氨基酸质量分数均显著降低。然而BL处理的芹菜全株干重比WH显著增加32.18%,叶片可溶性蛋白质、叶柄组氨酸(His)和脯氨酸(Pro)质量分数均显著增加。利用隶属函数分析对芹菜幼苗生长发育进行综合评价发现,BL处理表现最优。综上所述,蓝光和低氮组合能促进芹菜干物质积累,提高可溶性蛋白质和游离氨基酸质量分数,进而促进芹菜幼苗生长发育。
中文关键词:光质  施氮量  芹菜  游离氨基酸  元素
 
Effects of light-nitrogen interaction on the growth and physiological characteristics of celery seedlings
Abstract:Light quality and nitrogen content are both key factors in celery growth and development, appropriate combination of light and nitrogen promotes celery seedling quality. In order to optimize celery seedlings culture, celery seedlings were exposed to two kinds of light quality(White light, W; Blue light, B)and two kinds of nitrogen contents(8 mmol/L KNO3, high nitrogen, H; 4 mmol/L KNO3, low nitrogen, L), WH was used as control. The effects of light-nitrogen interaction on the celery growth, physiological metabolism and nutrient accumulation of celery seedlings were investigated. The results showed that: Compared with WH, WL and BH treatments significantly decreased whole plant dry weight by 43. 18% and 55. 07%, respectively. WL treatment also significantly reduced nitrate, soluble protein and total free amino acid contents in celery leave and petiole. BH treatment significantly increased nitrate, soluble protein and nutrient contents in leaves and petioles, whereas the treatment significantly decreased the contents of soluble sugars, amino acids of alanine group and serine group in leaves. BL treatment significantly increased whole plant dry weight by 32. 18%, enhanced nitrate and soluble protein contents in leave, and histidine(His)and proline(Pro)contents in petiole when compared with WH. The results of comprehensive evaluation of celery growth and development with membership function analysis indicated that BL treatment was the best among all treatments. In conclusion, the combination of blue light and low nitrogen content increased plant dry weight, soluble protein and free amino acid contents, and finally promoted celery seedling growth and development.
keywords:light quality  nitrogen content  celery  free amino acid  nutrient
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