It is the key to protect flowers and fruits for high yield of Chinese wolfberry.

Serious flower and fruit drop is an important reason affecting the yield of Lycium barbarum. This paper introduces several effective prevention and control methods.

First, foliar fertilizer spraying

On the basis of good application of base fertilizer, foliar spraying at flowering and fruiting stage can reduce flower and fruit drop. However, the effect of spraying fertilizer on preventing flower and fruit drop is also different with different types and proportion of fertilizer spraying. According to the experiment, foliar fertilizer spraying increases the fruit setting rate by 38% compared with water spraying. The ternary compound fertilizer sprayed with nitrogen, phosphorus and potassium has the best effect, and its proportion is better at 1:1:1. Compared with spraying water, it reduces the drop of flowers and fruits by 55%, increases the 1000-grain weight of fruit by 2% to 77%, and increases the content of soluble solids by 11%.

Second, foliar spraying rare earth

According to the experiment: spraying 0.1% rare earth fertilizer on the leaves of Chinese wolfberry can reduce the drop of flowers and fruits by 19% and 42%, increase the weight of 1000 fruits by 13%, promote tree growth, increase the weight of leaves and chlorophyll content in spring shoots, and enhance the absorption of phosphorus. The concentration of rare earth spraying should be 0.05%-0.10% for young trees and 0.10%-0.15% for adult trees. If it is sprayed twice a year, it is better to spray once in mid-June and early July. Rare earths can be applied alone or sprayed in conjunction with "love more".

Foliar spraying of plant growth regulators

The main results are as follows: (1) during the peak period of Lycium barbarum flowers and fruits (from early June to early July), spraying a-naphthylacetic acid with the concentration of 15 × 10 ~ 6 and 100 × 10 ~ 6 could reduce flower and fruit drop and increase the weight of 1000 fruits.

In use, because the concentration is too small and difficult to prepare, it can be prepared into a high concentration of mother liquor, and then a certain amount of mother liquor can be diluted with water. If 1 gram of medicine is dissolved in 1000 ml of hot water, 1 mg of a-naphthylacetic acid is contained in every 1 ml of potion. If you want to match the solution with a concentration of 15 × 10-6, take 15ml of mother liquid and add 985ml of hot water.

(2) 2pr 4m d2m 4m d can be used to prevent fruit trees and vegetables from falling flowers and fruits, forming seedless fruits. It can also make the fruit mature early and increase the yield. Spraying 15 × 10 ~ (- 6) × 10 ~ (- 6) × 100 × 10 ~ (- 6) ·100 × 10 ~ (- 6) 2 ~ (- 6) × 10 ~ (- 6) aqueous solution of Lycium barbarum L. to the crown could reduce the flower and fruit drop and increase the 1000-grain weight of fruit.

(3) more harvest can promote plant development, blossom earlier, improve quality and prevent falling flowers and fruits. Spraying 0.1% Aiduo on the crown of Chinese wolfberry during the blooming and fruiting season can reduce the drop of flowers and fruits by 12% and 16%, and increase the yield by 12% and 35%.