Research Of Foliar Spraying' Influence On The Growth Of Camellia Oleifera Abel Sprouts In Different Environments

Camellia Oleifera Abel is a kind of woody oil-bearing plant in our country with high quality and various function values. Since the dawn of time, in-depth research has been conducted to understand the cultivation and application of Camellia oleifera Abel and thus a comparatively complete theoretical system has been developed. However, research has mainly focused on the three genetic aspects; there is little research on cultivating seedlings, even less research on how to improve the growth of sprouts.In this experiment, orthogonal experiment design was used by setting four different concentrations of GA3, carbamide and potassium dihydroxide phosphate and thus formed sixteen different treatments, and do the foliar fertilizers in four environments—the nature environment, tectorial membrane environments, shade environments, tectorial membrane and shade environments. By synthesizing the index of the stem, leaf, root, the photosynthesis and other physiology and biochemistry of the sprouts, this thesis raises an optimal treatment plan on cultivating the Camellia Oleifera Abel seedlings.(1) The main factors that influence the extension of the stem of the Camellia Oleifera Abel seedlings is the environment, the secondary factors are the potassium dihydroxide phosphate and GA3, and carbamide is an unimportant factor. The most suitable environment for the extension of the stem is the shading environment, and the stem elongation is better developed in natural environment than covered with film; the potassium dihydroxide phosphate concentration has a positive effect on the growth of stem within the range of 0.4%,that is, the higher the concentration is,the better the stem grows, and the ideal concentration of potassium dihydrogen phosphate for the growth of the stem is 0.4%. The positive effect of GA3 is obvious only under the concentration of 0.04%, high or low concentrations of GA3 has no effect on improving the extension of the stem.(2) The main factor that influences the width of the stem of the Camellia oleifera Abel seedlings is carbamide. The secondary factor is the environment, the potassium dihydroxide phosphate and GA3 are unimportant factors. Spraying different concentrations of carbamide can promote different widths of the stem, and when the concentration is 0.4% one can see significant growth. The best way to promote thickening of the stem is its shade environment. But the stem will not grow wider when the plant is covered by film, thus the former environment is not conducive to growth as opposed to its natural environment.(3) The main factor which influences the number of newly grown leaves of the Camellia oleifera Abel seedlings is the environmental control. The secondary factors are GA3, carbamide and potassium dihydroxide phosphate are unimportant factors. The best concentration of GA3 is 0.02%. The higher the concentration of GA3 the less the leaves will grow. The higher the concentration of GA3, the less the leaves will grow. It is still better than without GA3. In the aspect of environmental control, the most suitable environment is the shaded environment and also the one covered with film. The secondary environment is the shade environment. But the number of newly grown leaves is less when the plants are covered with film than when thay are in the natural environment.(4) The main factor that influences the number of underground fibrous roots is carbamide, the secondary factors are potassium dihydroxide phosphate, GA3 and environmental control are unimportant factors. Spraying different concentrations of carbamide may promote varied growth of numbers of fibrous roots underground, and you can see more significant growth with the increase of concentrations, the Optimal concentration is 0.5%. The potassium dihydroxide phosphate has an obvious effect on the number of underground fibrous roots when its concentration is 0.3%, other concentrations have small effect on promoting growth of underground fibrous roots.(5) The main factor that influences the photosynthetic rate of the Camellia oleifera Abel seedlings is GA3, the secondary factor is potassium dihydroxide phosphate and its environmental control. Carbamide is an unimportant factor. Spraying different concentrations of GA3 can promote photosynthesis, but the effect will be diminished when the concentration is increased. Various concentrations of potassium dihydroxide phosphate can also promote photosynthesis, and the effect will be diminished when the concentration is increased. On the aspect of environmental control, the shade environment is better than that with no shade, but photosynthesis will be affected if the plants are covered by film.(6) The main factor that influences the photosynthetic rate of the Camellia oleifera Abel seedlings is GA3, the secondary factors are the potassium dihydroxide phosphate and environmental control, carbamide is an unimportant factor. Spraying different concentrations of GA3 can promote photosynthesis, but the effect in promoting will decrease with the increase of concentrations. Various concentrations of potassium dihydroxide phosphate can promote photosynthesis, and the effect in promoting increases with the increase of concentrations. On the aspect of environmental control, the shade environment is better than that with no shade, but photosynthesis will be affected if the plants are covered by film.Synthesizing physiological and biochemical indexes, the optimal treatment on promoting the growth of Camellia Oleifera Abel seedlings.is:GA3 0.04%+ carbamide 0.5%+ potassium dihydroxide phosphate 0.4% +shade environment. In all, the shade environment is good for the growth of Camellia Oleifera Abel seedlings. After March, covering the plants with film may impede the growth of Camellia Oleifera Abel seedlings.