Sunflower H 1 planting instructions:
1. Sowing: Sow in time according to local climatic conditions, and sow with sufficient moisture to strive for the whole seedling. Sowing depth should be about 3-5CM, otherwise it will affect the emergence of seedlings. Row spacing is 83-85CM, plant spacing is 33-35CM, and seed consumption per mu is 0.8- 1KG. In order to save seeds, it is suggested to sow two seeds in one hole and 1 seed in the next hole, that is, 2- 1-2- 1. In order to prevent the shortage of seedlings, some seedlings can be raised in nutrient pots for replanting, and the emergence situation can be checked about one week after sowing. If the seedlings are short, they should be replanted or replanted in time.
2. Intercropping: When the seedlings grow to four true leaves (about 10CM high), they should be interplanted in time, leaving one seedling in each hole. It is suggested that the planting density should be controlled at 2 100-2400 plants/mu.
3. Irrigation: This variety has strong drought resistance, but in order to obtain high yield, it is suggested to irrigate it in four times during the whole growth period: after sowing, when the diameter of the disk is 5-7CM, it will be in the middle and late flowering period. 4. Pollination: When 5% of the sunflower blooms, a box of bees can be put in every 5 mu of land to facilitate pollination, or 2-3 times of artificial pollination can be carried out during the whole flowering period: the first pollination should be carried out 2-3 days after the sunflower blooms, and then every 3-4 days. Artificial pollination should start when the dew disappears in the morning. High temperature at noon is not good for pollination, and pollination should be carried out after 3 pm. The method is to pat the plants along the ridge with cotton round powder, holding the racket in one hand and the flowerpot in the other, which can greatly improve the seed setting rate and yield.