新的火山灰幼苗苗的生长在Binzhou, Shandong is the performance of the growth ability of seedlings. It better reflects the quality of seedlings, and the size of growth reflects the coordination status and overall level of various parts of the seedlings.
Therefore, the aboveground and underground parts of the seedlings have a greater impact on it. The weight, total seedling weight, ground fresh weight and seedling height play a major role in the growth of ash seedlings in Binzhou, Shandong. Among them, the contribution of dry leaf weight and fresh weight Large, indicating that the needles of Pinus tabulaeformis are important in the growth process of the new shoots of Fanmu, which is inseparable from the mineral bittersweet that the needles provide energy for the initial growth of the new shoots and are transported and stored to the new shoots.
The major influences on the growth of new shoots of Platycladus orientalis seedlings are the stem distance, the fresh weight of the main root, the ratio of stem to root and the height of the seedlings. The leaf quantity index is not included. It can be seen that the dependence of Platycladus orientalis is not as strong as that of Pinus tabulaeformis in the early growth period.
Seen from the index of influence on the growth of new shoots of larch, including the underground parts of ash tree. The difference in seedling morphology grade, photosynthesis, and seedling morphological size is ultimately the difference in the growth ability of seedlings.
Therefore, the material growth capacity of seedlings of different grades should be sufficiently different. The net photosynthetic rate is the fixed amount of photosynthesis minus the amount of CO consumed by photorespiration and respiration, which directly reflects the material production capacity per unit leaf area.