Quantifying the total airborne nitrogen input into agroecosystems in the North China Plain
Quantifying the total airborne nitrogen input into agroecosystems in the North China Plain
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DOI：
10.1016/j.agee.2006.12.016
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发表时间：
2007-08-01
影响因子：
6.6
通讯作者：
Zhang, Fusuo
中科院分区：
文献类型：
--
作者：
He, Chun-E.;Liu, Xuejun;Zhang, Fusuo
大气沉降氮素输入是华北平原一个值得关注的问题。为了量化的问题的严重性，总的空气中的氮沉降到农业生态系统中的NCP量化使用手动ITNI（综合总氮输入）系统和长期实验（LTE）。当玉米（Zea mays）为监测作物时，北京东北旺（DBW）、河北吴桥（WQ）和河北曲周（QZ）的氮沉降总量平均为83.3 kg N ha（-1），开花至成熟期大气氮输入为14 kg N ha（-1）。在ITNI系统中的N-15-供应水平似乎并不影响氮沉降的估计显着。然而，氮沉降值只有48.6公斤氮公顷（-1），平均时，在同一时期的玉米（5月至9月），黑麦草（Lolium multiflorum）种植，这表明总的空气中的氮输入不同的监测作物，主要是因为不同的表面积。从昌平LTE的零氮样地获得的年总氮沉降量（82.8 kg N ha（-1））支持基于玉米的ITNI系统的氮沉降结果。(c)2006 Elsevier B. V.保留所有权利。
Nitrogen (N) input from atmospheric deposition is a concern in the North China Plain (NCP). To quantify the magnitude of the problem, the total airborne N deposition to agroecosystems in the NCP was quantified using a manual ITNI (integrated total nitrogen input) system and a long-term experiment (LTE). Total estimated N deposition averaged 83.3 kg N ha(-1) across the sites Dongbeiwang (DBW) of Beijing, Wuqiao (WQ) and Quzhou (QZ) of Hebei, with atmospheric N input 14 kg N ha(-1) in the period from flowering to maturity, when maize (Zea mays) was the monitoring crop. The N-15-supply level in the ITNI system seemed not to affect the estimation of N deposition significantly. However, the N deposition value was only 48.6 kg N ha(-1) on average when ryegrass (Lolium multiflorum) was cultivated during the same period of maize (May-September), suggesting that total airborne N input varies with the monitoring crop, largely because of the different surface areas. The total annual N deposition obtained from zero-N plots of LTE at Changping (82.8 kg N ha(-1)) supported the N deposition results from the maize-based ITNI systems. (c) 2006 Elsevier B.V. All rights reserved.