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对28个马尾松种源试验林(9年生)的9个种源测定了净光合速率、暗呼吸速率、单株叶量、光合生产率及有关生理指标的日变化和季节变化,表明上述指标在各种源间差异显著,单株光合生产率与种源关系密切。南带种源具声最高的净光合生产率、低的暗呼吸速率、高的单株叶量和光合生产率。联系种源原产地的生态环境和生长习性,证明南带种源马尾松的速生性具有内在的遗传基础。
The daily and seasonal changes of net photosynthetic rate, dark respiration rate, leaf mass per plant, photosynthetic rate and related physiological indexes of nine provenances of 28 Pinus massoniana provenance forests (9 years old) Significant differences between various sources, single plant photosynthetic rate and provenances closely. Southern belt provenances with the highest net photosynthetic rate of sound production, low dark respiration rate, high leaf yield per plant and photosynthetic productivity. The ecological environment and growth habit of origin of provenance were proved to prove the inherent genetic basis of fast-growing Pinus massoniana provenance in southern belt.