干旱区生态环境知识资源中心(Arid): 土壤剖面不同层次标记硝态氮的运移及其后效

Arid

	土壤剖面不同层次标记硝态氮的运移及其后效
其他题名	Movement and Residual Effect of Labeled Nitrate-N in Different Soil Layers
	张丽娟 1; 巨晓棠 1; 张福锁 1; 彭正萍 2
ISSN	0578-1752
出版年	2007
卷号	40 期号:9 页码:1964-1972
中文摘要	[目的]以北方半干旱湿润区潮土为对象,探讨土壤剖面不同层次硝态氮(NO-3-N)的运移及其后效.[方法]采用外源标记微注射法,设置田间微区试验.[结果]在试验水氮管理条件下,15、45、75 cm 3个标记处理分别向下迁移了65、35、25 cm,但均未移出作物根区(1 m).播后至冬前3个标记处理100 cm处土壤溶液NO-3-N浓度变动较小,生长后期小麦15、45 cm标记处理出现上升,而菠菜则有所降低,两种作物的75 cm标记处理在整个生长季持续上升,说明作物对75 cm标记硝态氮利用程度较低.夏玉米对前茬标记氮的利用率为2.1%～5.6%,其中以标记45 cm土层处理残效最高;15 cm和45 cm 2个标记深度前茬小麦京411显著高于前茬小麦小偃54.[结论]土壤剖面不同层次累积硝态氮在作物生长季内未发生强烈的淋洗,但表现出上层标记硝态氮移动距离长,下层移动距离短的规律;100 cm处土壤溶液NO-3-N浓度的动态变化可在一定程度上反映作物根区内氮素利用的状况;后茬作物对标记于土壤剖面不同深度的硝态氮的利用是很有限的,与前茬作物吸收、土壤剖面硝态氮的运移及残留密切相关.
英文摘要	[Objective] The purpose of this study was to investigate the movement and residual effect of labeled NOVN in different layers of fluvo-aquic soil of semi-arid and wet land in north China. [Method] Field micro-plot experiment and the external injection technique of labeled NOyN were adopted. [Result] The results showed that, NOyN for three treatments labeled at the depth of 15, 45 and 75 cm was moving downwards 65, 45 and 25 cm, respectively, however, no labeled NOVN was found outside crop root zone (lm). The labeled NO_-~3-N concentration in 100 cm under three treatments showed less fluctuation from after-sowing period to before-winter. It was detected an increasing tendency of labeled NO_-~3-N at the stage of anaphase under two treatments labeled at the depth of 15 and 45 cm for wheat. A decreasing tendency occurred under the same treatments for spinach. The labeled NO_-~3-N under the treatment of 75 cm labeled was sustainable, increasing during the growing season of wheat and spinach, which indicated low NOyN use in this layer. Afterwards, the labeled NOVN utilization ratio in summer maize ranged from 2.1% to 5.6%, and the residual effect under the treatment of labeled 45 cm was the highest among all labeled NOVN treatments. Under two treatments of 15 and 45 cm labeled, the residual effect was significantly higher for proceeding wheat Jin411 than that for proceeding wheat Xiaoyan54. [Conclusion] As a conclusion, there was no severe nitrate leaching in different soil layers during the growing season, which represented that long moving distance of labeled NOyN in upper labeled soil and short moving distance in subsoil. The dynamics of NOyN concentration in soil solution at 100 cm labeled could be reflected N utilization in root zone. The utilization of NOyN labeled in different soil layers was limited for the succession crop, which was related to N uptake of proceeding crop, movement and residual of labeled NO_3-N in different soil layers.
中文关键词	小麦 ; 菠菜 ; 玉米 ; 累积氮利用率
英文关键词	15N ~(15)N Wheat Spinach Maize Utilization ratio of NO_3-N
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:2917631
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221775
作者单位	1.中国农业大学资源与环境学院, 北京 100094, 中国; 2.河北农业大学资源与环境学院, 保定, 河北 071001, 中国
推荐引用方式 GB/T 7714	张丽娟,巨晓棠,张福锁,等. 土壤剖面不同层次标记硝态氮的运移及其后效[J]. 中国农业大学,2007,40(9):1964-1972.
APA	张丽娟,巨晓棠,张福锁,&彭正萍.(2007).土壤剖面不同层次标记硝态氮的运移及其后效.,40(9),1964-1972.
MLA	张丽娟,et al."土壤剖面不同层次标记硝态氮的运移及其后效".40.9(2007):1964-1972.