Spraying some nutrient fertilizers containing hormones during flowering period of fruit trees can increase the fruit setting rate of fruit trees, improve the quality of fruits, and increase the yield of fruit trees.
First, mineral nutrients
1. Urea. The 0.2%-0.3% urea solution was sprayed once before flowering, during flowering, and after flowering, which had a good effect on improving fruit set rate.
2. Rare earth. Spraying rare earth can increase the rate of fruit set, using 500ppm solution spray before and during flowering. But be careful not to mix with alkaline fertilizers and alkaline pesticides.
3. Boron fertilizer. A 0.2%-0.3% borax or 0.1%-0.2% boric acid was sprayed once every 3 weeks after fruit buds inflating, flowering and flowering, which can increase the fruit setting rate by 15%-40%. Boron fertilizer can be mixed with urea.
4. Zinc sulfate. Spraying 0.1% zinc sulphate solution (preferably mixed with 0.1% boric acid) before flowering and during flowering can significantly increase the fruit setting rate.
5. Mo fertilizer (sodium molybdate, ammonium molybdate). Marshal is the apple flower spray molybdenum fertilizer effect is very obvious. According to the experiment, Red Star apple sprayed 0.3% sodium molybdate solution at full bloom, and the fruit setting rate could be increased by 107.4%.
6. Potassium dihydrogen phosphate. Li Shusheng spraying 0.2%-0.3% potassium dihydrogen phosphate solution during flowering can significantly increase the fruit setting rate.
Second, growth regulators
1. Gibberellin. Jujube spray 10-15 mg/L gibberellic acid, fruit set rate can be increased by 59%; hawthorn spray 40-50 mg/liter gibberellin, fruit set rate can be increased by 30% -50%; Kyoho grape full bloom In the first l-2 days, the inflorescence or inflorescence was sprayed at a concentration of 100 mg/L. After the flower was full, the length of the fruit was increased until the size of the soybean was larger. The seedless rate was 100%, and the fruit weight was increased. Sugar content and coloration improve fruit quality.
2. Cytokinin. Spraying 800 times cytokinin solution before and after flowering can significantly increase the fruit setting rate and increase the fruit sugar content.
3. Than long (B9). The Kyoho grape is sprayed with 0.2%-0.4% more than the long-term aqueous solution during the flowering period and two weeks after flowering, which can make the grain size, grain size, early maturity, and high yield. If the mixture is sprayed with 0.3% longer than 100 mg/L sodium bisulfite solution during the flowering period of Kyoho grape, the fruit preservation effect is very significant. Strawberry spray 2-3 times after the flower 0.10% -0.15% than the long-term solution, can promote the results, increase the fruit.
4. Paclobutrazol. When Kyoho grapevine shoots 8-12 leaflets before and after full bloom and post-flowering, spray 500 mg/l, 100 mg/l, and 200 mg/l paclobutrazol respectively, which can reduce the shoot growth by 2/5 and suppress Auxiliary shoot growth can reduce fruit drop, improve fruit quality and yield, which will benefit the next year's high yield.
5. Fruit shape agent. Flowering time with the 50 mg / liter sprayed Marshal apple flower and receptacle, can increase the fruit shape index, pentagon obvious, improve the appearance of quality.
Third, leaf nutrient photosynthetic agent and liquid fertilizer
1. Plant protection factor. During the bud stage and young fruit stage, 600 and 700 times of phytoalexins were sprayed respectively to increase the fruit setting rate.
2. Ye Bao. In the flowering period of fruit trees and young fruit period foliar spray, can save flowers and fruits, increase the rate of 20% -30%. Each use of water 40-50 kg, can be mixed with acidic pesticides, if you add a small amount of urea, the effect is more obvious.
3. Photosynthetic fertilizer. Red Fuji apple began to spray photosynthetic micro fertilizer three weeks after flowering, and even sprayed three times. Each time the interval was 15 days, the fruit setting rate increased by 87.7%.
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