Effects of Nitrogen Fertilizer on Nutritional Quality and Root Secretion Accumulation of Hydroponic Lettuce

	Effects of Nitrogen Fertilizer on Nutritional Quality and Root Secretion Accumulation of Hydroponic Lettuce
	Qiu, Z. P.; Yang, Q. C.; Liu, W. K.
刊名	INTERNATIONAL SYMPOSIUM ON NEW TECHNOLOGIES FOR ENVIRONMENT CONTROL, ENERGY-SAVING AND CROP PRODUCTION IN GREENHOUSE AND PLANT FACTORY - GREENSYS 2013
	2014
卷号	1037 页码:679-685
关键词	nitrogen nutrition vitamin C carotenoids nitrate TOC
ISSN号	0567-7572
通讯作者	Qiu, Z. P.
英文摘要	A glasshouse experiment was carried out to investigate the effects of nitrogen levels (5 and 10 mmol/L) and forms (nitrate nitrogen and nitrate plus ammonia nitrogen) on growth, photosynthetic pigment content, nutritional quality and root secretion accumulation of hydroponically cultivated lettuce. The results showed that nitrogen level of the same nitrate form did not or slightly affect shoot, root and total biomass of lettuce, while nitrate plus ammonia nitrogen (1:1, mol/mol) treatments decreased shoot, root and total biomass of lettuce compared with entire nitrate nitrogen treatments. Two nitrogen levels of nitrate nitrogen or nitrate plus ammonia nitrogen did not make difference in leafy chlorophyll a, b and carotenoid contents of lettuce, but nitrate nitrogen plus ammonia nitrogen significantly increased chlorophyll a, b and carotenoid contents in leaves compared with entire nitrate nitrogen treatments. Both nitrogen level and form affected vitamin C content in leaves. Vitamin C contents in leaves were improved with the increase of nitrate nitrogen supply level, while ammonia nitrogen plus nitrate nitrogen treatments had higher vitamin C contents in leaves than those of entire nitrate nitrogen treatment at the same nitrogen level. Nitrate nitrogen supply levels did not altered nitrate content in leaves of lettuce, but ammonia nitrogen plus nitrate nitrogen treatments decreased nitrate content compared with the treatments with the same level of entire nitrate nitrogen supply. Entire nitrate nitrogen supply gave similar total organic carbon (TOC) concentration and content regardless of nitrogen level, but they were significantly lower than those of nitrate plus ammonia nitrogen treatments. Additionally, lower nitrogen level treatment with ammonia nitrogen plus nitrate nitrogen presented greatest TOC concentration and content.
学科主题	Agronomy ; Horticulture
语种	英语
出版者	INT SOC HORTICULTURAL SCIENCE
WOS记录号	WOS:000357373600087
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19817]
专题	农业环境与可持续发展研究所
作者单位	Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Energy Conservat & Waste Management Agr S, Minist Agr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Qiu, Z. P.,Yang, Q. C.,Liu, W. K.. Effects of Nitrogen Fertilizer on Nutritional Quality and Root Secretion Accumulation of Hydroponic Lettuce[J]. INTERNATIONAL SYMPOSIUM ON NEW TECHNOLOGIES FOR ENVIRONMENT CONTROL, ENERGY-SAVING AND CROP PRODUCTION IN GREENHOUSE AND PLANT FACTORY - GREENSYS 2013,2014,1037:679-685.
APA	Qiu, Z. P.,Yang, Q. C.,&Liu, W. K..(2014).Effects of Nitrogen Fertilizer on Nutritional Quality and Root Secretion Accumulation of Hydroponic Lettuce.INTERNATIONAL SYMPOSIUM ON NEW TECHNOLOGIES FOR ENVIRONMENT CONTROL, ENERGY-SAVING AND CROP PRODUCTION IN GREENHOUSE AND PLANT FACTORY - GREENSYS 2013,1037,679-685.
MLA	Qiu, Z. P.,et al."Effects of Nitrogen Fertilizer on Nutritional Quality and Root Secretion Accumulation of Hydroponic Lettuce".INTERNATIONAL SYMPOSIUM ON NEW TECHNOLOGIES FOR ENVIRONMENT CONTROL, ENERGY-SAVING AND CROP PRODUCTION IN GREENHOUSE AND PLANT FACTORY - GREENSYS 2013 1037(2014):679-685.