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了解与掌握森林养分循环的规律,对于制定森林经营和森林土壤管理措施均有重要意义。现参考有关资料文献、综述土壤中的N 素来源及其循环,森林的凋落物、根系枯落物和降水降尘等与森林养分循环的关系,并相应地谈谈有关营林问题。一、土壤中的 N 素来源及其循环N 素是生物的重要养分元素,是组成蛋白质的主要成分。在森林土壤中的 NH_4~+态
Understanding and mastering the law of forest nutrient cycling is of great significance to the formulation of forest management and forest soil management measures. Reference is now made to the relevant literature to review the relationship between N sources and their circulation in soils, forest litter, root litter, precipitation and precipitation, and nutrient cycling in forests, and to discuss the issue of silviculture. First, the source of soil N and its circulation N element is an important biological element of the body, is composed of the main components of protein. NH_4 ~ + in forest soil