中文摘要：

在改变滋养的周期和流动的华盖的功能是最近的年里的焦点之一。根据包括地估价出版研究，我们分析了从影响了它的植物华盖和几个因素沥滤的氮损失。我们指出了出版研究和应该被解决的关键问题的劣势：(1 ) 先进的月经需要，和研究应该在从领域植物的华盖沥滤的氮损失上被执行。(2 ) 如果氮从植物华盖被沥滤，关于氮损失的类型的研究应该被执行，并且不同变化的氮使用效率应该关于沥滤的氮在一个研究观点上被发。(3 ) 研究应该在机制和小径上被进行，并且氮沥滤的进步；并且影响氮沥滤的因素应该在研究被包括 stomata 密度， stomata 传导力，和明显的空间，它对有益例如不同生长阶段的叶面积，解释氮从植物华盖沥滤的机制。

英文摘要：

Function of canopy in changing nutrient cycle and flux is one of the focuses in recent years. On the basis of comprehensively appraising published research, we analyzed the nitrogen loss leaching from plant canopy and several factors which affected it. We pointed out the disadvantages of the published researches and the key issues that ought to be solved： （1） The menstruation need to be advanced, and the research should be carried out on nitrogen loss leaching from the canopy of the field plant. （2） If the nitrogen is leached from the plant canopy, the research on the type of nitrogen loss should be carried out, and the nitrogen use efficiency of different varieties should be dealt on a research perspective with regard to the nitrogen leaching. （3） The research should be conducted on the mechanism and pathway, and the progress of nitrogen leaching; and the factors affecting nitrogen leaching should be included in the research, such as the leaf area of different growth stages, stomata densities, stomata conductance, and the apparent free space, which are beneficial to explain the mechanism of nitrogen leaching from the plant canopy.