The phenomenon of falling flowers and fruits of Schisandra chinensis

1. Falling flowers caused by herbicide damage. ⑴ symptoms: new functional leaves curled in spring, serious leaves were black, withered and fell off, herbicide drift occurred in flowering, petals wilted, petals fell off early, pollen vigor decreased or died, pollination was difficult, and flowers did not bear fruit; ⑵ causes: 2mae4 color D butyl drug damage; ⑶ preventive measures: ① recommended using 2mae4murD isooctyl ester instead of 2mae4ray D butyl ester. ② found that the symptoms could be sprayed with 500x yellow humic acid foliar fertilizer.

Second, low temperature and freezing injury cause falling flowers and fruits. The late frost in spring caused the destruction of the growth tissue of Schisandra chinensis and the destructive drop of flowers and fruits in the physiological tissue.

Third, unreasonable pruning causes falling flowers and fruits. It is mainly due to unreasonable pruning in the management process of Schisandra chinensis, unreasonable proportion and structure of developing branches and fruiting branches, resulting in flower and fruit drop. Each ear of Schisandra chinensis needs about 50 healthy functional leaves to provide nutrients. Once the ratio of leaves to ears is unreasonable, it will inevitably lead to undernourished flowers and fruits. The solution is to adjust the pruning method to ensure that the ratio of fruiting branch, pregnant bud branch and functional branch is 1:1:1 as far as possible.

Fourth, the lack of trace elements causes falling flowers and fruits. Lack of trace elements and imbalance will lead to a large number of physiological flower and fruit drop of Schisandra chinensis, especially the lack of boron, which will directly lead to flower and fruit drop or fruit drop. The solution is to apply fertilizer reasonably and apply foliar fertilizer regularly to keep the balance of trace elements in Schisandra chinensis plant.

Fifth, drastic changes in the environment lead to falling flowers and fruits. The season of sudden rise of long-term low temperature and rainy temperature makes the physiological function of Schisandra chinensis itself unable to adapt to the changes of the environment, resulting in imbalance of nutrient distribution in the plant in a short period of time, resulting in falling flowers and fruits, which usually occurs from July to August and disappears naturally after the temperature is stable.

In order to prevent the phenomenon of falling flowers and fruits, it is necessary to strengthen the management of Schisandra chinensis in the early growth stage, achieve balanced fertilization, enhance the tree potential, and strengthen the resistance of Schisandra chinensis to adverse environment.