有机与非有机莴苣的氮稳定同位素辨识研究

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	有机与非有机莴苣的氮稳定同位素辨识研究
	姚志鹏 1; 郭智成 2; 李玉中 1; 徐春英 1; 李巧珍 1; 房福力 1
刊名	园艺学报
	2014
卷号	41 期号:12 页码:2507-2512
关键词	莴苣有机蔬菜氮稳定同位素 δ~(15)N
ISSN号	0513-353X
其他题名	Identification of Organic or Conventional Lettuce by Nitrogen Isotope
英文摘要	为了证明利用氮稳定同位素技术鉴别有机蔬菜的可行性,本试验研究了不同肥料条件下土壤和莴苣不同部位的同位素特征变化情况。设置4个不同肥料条件:撒施有机肥(N400kg?hm~(-2))、局部施尿素(N300kg?hm~(-2))和撒施尿素(N400kg?hm~(-2)),以及对照(不施用任何肥料)。结果表明不同肥料条件下土壤~(15)N丰度(即δ~(15)N)差异显著(P<0.05),表现为撒施有机肥 > 对照 > 局部施尿素 > 撒施尿素。各肥料条件下土壤δ~(15)N值均呈现先升高再降低最后趋于平稳的变化规律,峰值出现在定植后20 d。不同处理莴苣δ~(15)N值的差异及变化规律与土壤δ~(15)N值变化规律相同。莴苣不同部位δ~(15)N值比较结果为:外叶 > 根 > 内叶。莴苣内部同位素特征受环境影响最迅速。总体上,莴苣内叶和土壤的δ~(15)N变化可以反映施肥情况,从而可对判断有机蔬菜种植过程中氮肥的施用种类提供依据。; δ~(15)N values of lettuce and soil were studied with different fertilizer conditions to prove the feasibility of using δ~(15)N to discriminate between organic food and conventional food, 4 treatments were laid out: Organic fertilizer in traditional broadcast way (N 400 kg ? hm~(-2)), urea in partial fertilization way (N 300 kg ? hm~(-2)), urea in traditional broadcast way (N 400 kg ? hm~(-2)) and the control without fertilizer. The δ~(15)N values of lettuce and soil in 4 treatment were significantly different (P < 0.05), the order from high to low is organic fertilizer > control > urea in partial fertilization way > urea in traditional broadcast way. The temporal variations in the δ~(15)N of lettuce and soils were similar among 4 treatments: Theirδ~(15)N values increased rapidly at first, then reduced slowly and stabilized finally. Maximum appeared in 20 days after transplanting. The δ~(15)N value order of different lettuce organs is external part > root > internal part, and the difference is significantly (P< 0.05) .To sum up, the δ~(15)N in inner of lettuce and soil can be used as a marker to reveal the history of nitrogen fertilization. It is useful tool for identifying the use of synthetic nitrogen fertilizer in the process of lettuce planting.
学科主题	园艺
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/16892]
专题	农业环境与可持续发展研究所_旱作节水研究室
作者单位	1.中国农业科学院农业环境与可持续发展研究所, 农业部旱地节水农业重点实验室, 北京, 100081 2.中国农业科学院环境稳定同位素实验室, 北京, 100081
推荐引用方式 GB/T 7714	姚志鹏,郭智成,李玉中,等. 有机与非有机莴苣的氮稳定同位素辨识研究[J]. 园艺学报,2014,41(12):2507-2512.
APA	姚志鹏,郭智成,李玉中,徐春英,李巧珍,&房福力.(2014).有机与非有机莴苣的氮稳定同位素辨识研究.园艺学报,41(12),2507-2512.
MLA	姚志鹏,et al."有机与非有机莴苣的氮稳定同位素辨识研究".园艺学报 41.12(2014):2507-2512.