What should I pay attention to when planting sunflowers?

What should I pay attention to when growing sunflowers? Have any netizens who have ever planted to help guide the farming network to sort out the problems that need to be paid attention to in planting sunflowers? the following are listed for netizens' reference. First, scientific selection of planting land to prevent repeated cropping: sunflowers should be planted in plots with flat terrain and medium soil fertility, and rotation should be carried out for more than 4 years. Wheat, corn, sorghum, rape and potato are suitable for previous crops, and legume crops susceptible to Sclerotinia sclerotiorum are not easy to be used as previous crops. Second, the arrangement of planting land and the method of fertilization: the root system of sunflower is developed, the plant is exuberant, and the soil is deeply ploughed, which can effectively promote the growth of root system and help the root system to absorb water and nutrients. Applying sufficient base fertilizer and proper topdressing at budding stage can effectively increase yield. In general, 20 jin of diammonium, 15 jin of urea, 15 jin of potassium and 1.5 jin of zinc sulfate are used as base fertilizer in production, and 25 jin of urea is applied per mu in bud stage. Third, select suitable sunflower varieties: general summer sowing edible sunflower production can choose LD5009, SH909 and other varieties, oil sunflower can choose S606, KF366, short big head and other varieties. Attention 4. Sunflower sowing time and method: choosing a good sowing date is an important factor affecting sunflower yield and quality. It is more suitable to sow seeds from May 25 to June 10 in mountain areas, and from June 25 to July 10 in plain areas. When sowing, use large and small rows planting, 1-2-1 sowing method. Fifth, timely inter-seedling, seedling supplement: the density of hybrid sunflowers has a great impact on yield, so seedlings should be retained strictly according to the requirements of varieties to prevent overdensity. After emergence, the seedling inspection should be carried out in time, and the phenomenon of serious lack of seedling broken strips should be found. It is necessary to promote budding and replanting as soon as possible to ensure the whole seedling. Pay attention to sixth, sunflower seedling method: sunflower seedling growth is slow, seedling potential is weak, should do a good job of inter-tillage weeding and seedling fixing work. Two pairs of true leaves were used to determine the seedlings, one in each hole. The first intertillage was carried out in 1 Mel and 2 pairs of true leaves, and the seedlings were fixed in depth of 10cm. The second intertillage was carried out one week after seedling setting, and the depth was 15cm. The third intertillage was completed before ridge closure, with a depth of 20cm. Click to get more sunflower planting techniques click to get more food crop planting techniques