福建农业学报2011，Vol.26Issue(6)：1135-1141,7.
林地生态系统土壤可溶性有机氮库及其生态功能研究进展
Research Progress on Soluble Organic Nitrogen Pool in Soil and Its Functions in Forestry Ecosystem
摘要
Abstract
This paper reviews the recent research progress in China and abroad on the pool size, composition and eco-functions of the soluble organic nitrogen (SON) in soil in the forestry ecosystem. The SON content in forest soil varied with soils, forest types, climate conditions and analytical methods. The soil SON content in the mineral layer is generally between 1 mg · kg-1 and 87 mg · kg-1. It ranges from 23 mg · kg-1 to 448 mg · kg-1 in the organic layer. They account for 16% -96% of the total soluble nitrogen in the soil. Soil SON includes a mixture of nitrogenous compounds of different structure, including ammonia nitrogen, amino acids and ammonia sugar. Forest plants can utilize low molecular weight SON (such as artificial fertilization of amino acids). However, no evidence has been shown that the plants could directly absorb the natural SON in soil. Forest soil SON is a very important nitrogen source. It plays a significant role in the nitrogen cycle in the forestry ecosystem. Future research on forest soil SON should focus on chemical and biological properties of SON, dynamic characteristics of soil natural SON, nutritional functions of the natural SON in N-limited forestry ecosystem, eco-function evaluation of SON, impact of microorganisms on SON kinetics in the forest ecosystem and direct uptake of SON by forest plants.关键词
林地生态系统/土壤可溶性有机氮/含量/组成/生态功能Key words
Forestry ecosystem/ soil soluble organic nitrogen/ content/ composition/ eco-function分类
农业科技引用本文复制引用
高雪梅,黄沐亮,阙辰月,周碧青..林地生态系统土壤可溶性有机氮库及其生态功能研究进展[J].福建农业学报,2011,26(6):1135-1141,7.基金项目
国家自然科学基金项目(31170485) （31170485）
福建农林大学国家大学生创新性实验项目(101038919) （101038919）
福建省自然科学基金项目(2011J01259) （2011J01259）
福建省教育厅科技计划项目(JK2010015) （JK2010015）
