论文部分内容阅读
以广玉兰林下的菲白竹、靓竹、黄条金刚竹、美丽箬竹和菲黄竹等5种地被竹为研究对象,在不同光照环境下测定了地被竹生长状况和光合能力。结果表明上层广玉兰的遮阴程度对地被竹的有明显的光照竞争,但竹子的生长状况变化不一,菲黄竹和靓竹受光照影响明显,生长指标差异性大,耐荫性弱;菲白竹、黄条金刚竹和美丽箬竹生长差异性不明显,耐荫性较强。5种地被竹的净光合速率呈现出相同的变化规律,即光照强度越大,净光合速率越高,日进程峰值出现在光照强度最大时(11:00),之后有不同程度下降。
In this study, five species of Phyllostachys pubescens, Pleurotus citrinopileatus, Radix et Rhynchophylla, Pleurotus citrinopileatus and Phyllostachys pubescens under Magnolia grandiflora were studied. The growth status and photosynthetic capacity of Phyllostachys pubescens under different light conditions were measured. The results showed that the degree of shading of Magnolia grandis on the ground was obviously light competition with bamboo, but the growth of bamboo varied with different conditions. Phyllostachys pubescens, Phyllostachys praecox and the growth of the beautiful bamboo were not obvious, and the shade tolerance was stronger. The net photosynthetic rate of the five species of bamboo showed the same variation pattern, that is, the higher the light intensity and the higher the net photosynthesis rate, the longer the daily peak appeared at the maximum light intensity (11:00), then decreased to some extent.