农林复合系统水热生态特征研究进展

水热生态特征是农林复合系统的重要研究内容,该主题研究对计量农林复合系统生态效益、优化复合系统结构配置、实施调控管理等具有重要的理论指导作用。本文基于CNKI、Science Direct、Springlinker、CABI Abstracts等数据库检索平台及中国林业科学院图书馆中文书籍数据库,检索分析了1980年以来有关研究农林复合系统对辐射、蒸散或蒸腾、土壤水分、根系、水分利用效率影响特征的中英文文献,概述了近35a来农林复合系统水热生态特征研究进展,并从研究内容及方法等角度提出展望,以期为进一步深入开展农林复合系统结构与功能研究提供参考依据,进而促进复合农林业学科发展。分析表明:(1)农林复合系统具有调控太阳辐射分布及冠层热量平衡等作用,但对光质、光谱等的影响效应鲜有详尽文献报道;(2)水分效应及其影响机理研究缺少整体性和系统性,致使相关结论难以形成统一的认识;(3)种间水分关系研究虽已取得一定进展,但有待从种间土壤水分利用来源及运移过程、水分消耗过程及强度的差异特征等角度,综合研究种间竞争与互补的时空变化格局及其调控机制等方面;(4)已有研究数据主要来自试验观测,影响研究结果的代表性,亟待加强模拟研究工作。

Research Advances on Hydrological and Thermal Characteristics of Agroforestry System

The research on hydrologic and thermal characteristics is important to the ecological benefits quantification, structure optimization, and management improvement of agro-forestry system (AFS). The Chinese and English literatures on radiation, evapotranspiration or transpiration, soil moisture, root system and water use efficiency characteristics of AFS from 1980 to present was retrieved and analyzed in this paper. The retrieved database included Science Direct, CNKI, Springlinker, CABI Abstracts, and the Chinese database of China Academy of Forestry Library. Moreover, the research advances of hydrologic and thermal characteristics of AFS in recent 35 years were summarized, and the prospects were proposed respectively. The objective of this study was to provide a reference for AFS research on structure and function. The results showed that: (1) the AFS could adjusted the solar radiation distribution and canopy heat balance. However, few studies have been performed to measure the light distribution in AFS quantitatively. (2) Because the systematic and integrated study on the mechanism of hydrological process was lacking, it was difficult to obtain a unified conclusion about the effects of AFS on water. (3) Even though the progress of water interaction under inter-species was obtained, the further study on water consumption sources, water transport, and water use efficiency of AFS was required. Moreover, the analysis of spatial and temporal variation of the interaction between inter-species was required in the future. (4) The most current existing data origin from the experimental measurements, and the representation was limited. Therefore, the further study on model simulation was required.