The sunflower is an important oil crop. The growing cycle of sunflowers is relatively short and generally takes 80-120 days from sowing to harvesting, suitable for crop rotation. Let's see how and when spring sunflowers grow。
I. Spring sunflower planting time
The spring planting time for sunflowers is determined mainly by local climatic conditions. In general, seeding can begin when the 10 cm layer temperature is stable at more than 10°c. In most areas, this point of time largely corresponds to the post-agricultural shock, that is, from early march to late april. The northern region generally sows between late march and 15 april, and the southern region is likely to run ahead of early march due to the early recovery of temperatures。
Ii. Methodology of the place of the summit
1. Land selection
The requirements for the soil are not stringent, but are more favourable in the case of soil fertility, good drainage and soil laxity. Sandy land is the best option for sunflower growth. Avoid planting on low-lying, salinous and adhesive lands。
2. Fertilisation
Before seeding, the land should be fully prepared, including deep tillage, the cleaning of bacteria, pests and weeds in the soil, and the application of appropriate amounts of base fertilizers. In general, 500 kg of fattening per acre can be applied to mature farmers and 30 kg of combined fattening of nitrogen, phosphorus and potassium。
3. Selection
Saturated, fresh sunflower seeds are selected to remove damage and impurities in order to increase seed sprouts。
Seeding
At a distance of 60 centimetres and 25-30 centimetres, the seeds are spread evenly over the plots, and are then pressed gently into the soil, so as to sow them at a depth of 3-5 centimetres. Not only is on-demand simple, but it also effectively controls the growth density of plants. On-demand seeding is generally 0. 5 - 0. 7 kg per acre。
Management of nursery
After planting, 7 to 10 days, seedlings are able to grow two to three real leaves, which can be removed. Plantation is carried out in such a way as to ensure the integrity of the seedlings, to avoid damage to the roots as far as possible, and after planting, to water them in a timely manner, maintain soil moisture and promote the growth of the seedlings。
These are descriptions of the timing and methods of planting the spring sunflower, which are normally harvested in august-september, and when the back of the florist turns yellow, the stasis turns yellow and the upper central leaf starts greening and yellowing, it should be physicolycized and duly harvested。
You may be interested in the following recommendations for the first vegetable network。
