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丘陵区速生杉木林是我国南方扩大栽杉形成的一个新的人工林生态系统。在其生产结构和生理功能方面,与中心产区杉木人工林生态系统有明显的差异性。本文以桂中丘陵地带一个典型的速生杉木人工林为研究对象,经过试验控制和三年定位观测,在获得大量数据的基础上,对以下五个方面问题作较为详尽的分析。即:(1)杉木各器官养分含量的变化规律;(2)速生杉木林的养分积累与分配;(3)林分生产力和养分积累速率;(4)营养元素的归还;(5)养分的生物循环。试验结果对丘陵区杉木人工林的经营管理、施肥和抚育间伐等具有参考价值。
The fast growing Chinese fir plantation in the hilly region is a new plantation ecosystem formed by expanding the fir plantation in southern China. In its production structure and physiological functions, there are obvious differences with the plantation ecosystem of Cunninghamia lanceolata in the central area. In this paper, a typical fast-growing Chinese fir plantation in the hilly region of Guihong was chosen as the research object. Based on the experimental control and three-year positioning observation, a large amount of data were obtained, and the following five aspects were analyzed in detail. Namely: (1) Changes of nutrient content in organs of Chinese fir; (2) Nutrient accumulation and distribution in fast growing Chinese fir plantation; (3) Stand productivity and nutrient accumulation rate; (4) Nutrients return; Biological cycle. The results of this study are of reference value to management and management of Chinese fir plantation in hilly area, fertilization and thinning.