A Medicine Test of thinning Ginkgo fruit
Fruit and flower regulation is an important measure of economic forest production. By regulating the amount of fruit and fruit, one can achieve the aim of high yield and stable yield. Secondly, the tree potential can be protected and its economic life is prolonged. Third, reduce the amount of fruit drop, reduce pollution. Economic trees blossom controlled by genetic and environmental factors at the same time, its flowers and control mainly through the physical, biological, chemical, three kinds of methods, get more and more widely applied in production practice.
Ginkgo has been developed rapidly in recent decades due to its excellent economic, ecological and social benefits, and it is widely used in forest, leaf forest and massive urban and rural afforestation projects. Now many of them have entered the fruit stage. In recent years, many Ginkgo female trees have been found to be too strong and the tree is weak. Many large trees and ancient trees have died because of their reproductive burden. How to control the total amount of the results and maintain the relative dynamic balance of reproductive growth and vegetative growth has become a scientific problem and production problem which is urgently needed to be solved.
This experiment was conducted in Pizhou, Jiangsu province. According to the existing research results, use drug S, X, Y, N, C, B and agents, such as 6 kinds of plant growth regulator or plant hormones spraying fruit control experiment, observe different drug concentrations of ginkgo real litter effect, the vegetative growth of trees. In experiment randomly selected in the forest plant, using the single factor analysis of variance, each agent set up three concentrations, seven repeat, every repeat request long handle amount not less than 50. On April 9, 2018, kinds of Ginkgo biloba did not appear before pollination traits administer treatment for the first time, after 30 d control fruit survey for the first time. The preliminary conclusions are as follows:
Agent S, agent X, agent N, agent C, agent B, agent Y and six other agents can promote Ginkgo fruit. Among them, the concentration of the drug S3 was between 25.37-29.62%, and the ratio of the fruit was nearly doubled, and the statistical analysis reached a significant level, P=0.03. The other five agents increased the fruit drop by 0.21-10.22%, and the variance test did not reach the significant level.
At that time, the growth of Ginkgo biloba was not large, and the effect of 6 kinds of agents on the growth of Gingko biloba was temporarily adopted by SPAD chlorophyll, and the chlorophyll in the samples was determined. It was found that concentration 2 and 3 of the agent N had a significant effect on chlorophyll content, and the influence of other agents was not significant.
Due to reproductive growth rhythm of Ginkgo biloba, this experiment in Ginkgo biloba solid second delivery mechanism for controlling fruit after pollination experiment data failed to reach, this paper is a drawback, but will continue to follow-up test. The effects of various agents and their concentration on the final fruit control effect of Ginkgo, and their effects on vegetative growth, and their various physiological effects were measured, analyzed and evaluated.
Key words：Ginkgo biloba; Fruit Quantity Control; Plant Growth Regulator; Reproductive growth; Vegetative growth