关键词: 柑橘, 光照, 叶绿素, 类胡萝卜素, 色泽, 糖

Abstract: Atmospheric nitrogen deposition has increased dramatically in recent years, due to the increasing discharge of nitrogenous compounds from industry and agriculture. Nitrogen deposition is an important nitrogen source of natural ecosystem, and its increase would disturb the ecosystem biogeochemical cycle. Because of the compositional complexity and large spatiotemporal variability of atmospheric nitrogen deposition as well as the disunity of measurement methods, it is difficult to compare the results from different nitrogen deposition studies. Aiming at the sources and composition of atmospheric nitrogen deposition, this paper summarized the past decades research progress at home and abroad in the observation and test methods of atmospheric nitrogen deposition, described in detail the principles and operations of the methods for measuring wet- and dry nitrogen deposition (traditional rain collection, automatic collection by instrument, ion exchange resin column collection, dust cylinder wet collection, and deposition velocity method), and compared the advantages and disadvantages of these methods. Meanwhile, based on the comparison of related studies at home and abroad, this paper also provided the regional quantitative information of nitrogen deposition flux. Presenting a brief review of representative techniques for nitrogen deposition observation, this paper preliminarily elucidated the theoretic bases and principles of atmospheric nitrogen deposition measurement, gave a qualitative reference for the contrastive analysis of different observation results, and provided theoretical bases for the reasonable choice of nitrogen deposition observation

Key words: Citrus, Light, Chlorophyll, Carotenoid, Color, Sugar