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用有关的光合数学模型估算了RRIM600、GT1两无性系的年光合总量及其逐月变动。结果表明:平均叶面积指数为5.6的RRIM600林分的年光合总量干物质为4044公斤/亩;平均叶面积指数为5.5的GT1林分为4000公斤/亩,前者比后者略大。日平均光合强度和月的总光合量在一年中的变动均呈双峰曲线类型,即:上、下半年各有一光合强度高峰或大的光合量值,但下半年的峰值比上半年的大些。注意到这两个无性系的年光合曲线在形状上的差异与它们的抗寒特性之间可能有一定的关联性。
The photosynthetic mathematic model was used to estimate the annual photosynthesis and its monthly variation of RRIM600 and GT1 clones. The results showed that the total annual dry matter yield of RRIM600 forest with average leaf area index of 5.6 was 4044 kg / mu and the GT1 with average leaf area index of 5.5 was 4000 kg / acre, while the former was slightly larger than the latter. The daily average photosynthetic intensity and monthly total photosynthesis showed a bimodal curve during the year, that is, there was a peak of photosynthetic intensity or a large photosynthetic rate in the first and second half of the year, but the peak value of the second half was higher than that of the first half bigger. Note that there may be some correlation between the shape differences of the annual photosynthetic curves of these two clones and their resistance to cold.