我国淡水水域光合产物的气候生产力探讨

根据太阳辐射在水体中的有效分布、生长季水温和浮游植物光合生态特性等因子,模拟计算了我国大陆东部淡水水域的光合生产力、气候生产力及其季节变化的地理规律。从中得知,这些水域初级产物的年气候生产力主要呈纬向分布,由南向北递减,各地范围在 1.6-24.4gC/m²·a之间,长江以南是>15.0gC/m²·a的高值区,长城以北和四川盆地为<10.0gC/m²·a的低值区,因此,在气候生产力高值区有可能充分利用气候资源优势,开发低成本的自然淡水水域渔业;而在低生产力区,受自然资源的局限其自然捕鱼量需适量控制,因地制宜。

A STUDY ON CLIMATIC PRODUCTIVITY OF PHOTOSYNTH- ETIC PRODUCTS IN FRESHWATER AREAS OF CHINA

In this paper, some geographical distribution laws of the photosynthetical productivity and the climatic productivity of phytoplankton in freshwater areas of eastern part of China are calculated theoretically with the climato-ecological method. From these results we can know that the annual climatic productivity of primary products in freshwater areas distributes mainly along the latitude and decreases progressively from south to north. Its range of variation is from 1.6-24.4 gC/m2.a. In view of the climatic resource of the photosynthesis of phytolankton, the net fish production in natural freshwater areas at different latitudes must be made in accordance with the different climatic conditions of photosynthesis.