Four measures to promote blossom of sweet cherry

First, spray paclobutrazol. In order to ensure sufficient flower buds every year, 500-1000 mg / kg paclobutrazol should be sprayed on the crown from mid-June to early July, once every 10-15 days, continuously for 1-3 times, to inhibit vegetative growth (trees with moderate growth for 1-2 times, trees with vigorous growth for 2-3 times, with crown branches basically stopped growing) to promote flower bud differentiation. Second, foliar spraying fertilizer. Foliar fertilizer spraying was carried out to ensure the nutrients needed for flower bud differentiation. Foliar fertilizer spraying began in late May and was sprayed every 7-10 days for 4-5 consecutive times. 0.7% brown sugar + 1000 letter "Tianda-2116" (special for fruit trees) solution can be used alternately with 0.4% potassium dihydrogen phosphate + 0.7% brown sugar solution. Third, soil film mulching. Soil cover plastic film, control soil irrigation, and pay attention to timely drainage after rain to prevent Rain Water from increasing soil moisture, as long as the soil is not dry, generally do not need watering, to prevent stimulating branches to grow again. Fourth, adjust the main branch. Adjust the angle of the main branch again, stretch to 75-90 degrees, slow down the vegetative growth rate of the main branch, improve the ventilation and light transmission condition inside the crown, enhance the photosynthetic function, and promote the flower bud differentiation in the inner hall.