Planting techniques of oil sunflower with short and big head

Prepare a piece of sunny sandy soil, apply sufficient basic fertilizer deeply, and then flatten the field. Select some mid-late mature seeds with high quality, high yield and strong disease resistance to be sown in the soil and cover the soil with a small amount of water. After the emergence of seedlings, do a good job of seedling replenishment, water and fertilizer, soil weeding and other basic management work. In late September, when the stem and the back of the disk turn yellow, it can be harvested.

High-yielding field management planting techniques of short big-headed oil sunflower:

1. Check and replenish seedlings in time

Make sure that the spare seedlings can be sown between rows when the whole seedling is sown on demand, and that the seedlings should be replanted in time when the seedlings are missing, and should be planted in water or in time after rain.

2. Ploughing, weeding and soil cultivation

Three times of intertillage should be carried out during the growth period of oil sunflower, and the first intertillage should be carried out after the seedlings are at present, with a depth of 5-8 cm, the second intertillage after the end of fixed seedlings, a depth of 8-12 cm, and the third intertillage before budding, with a depth of 12-15 cm.

Chemical weeding:

In addition to artificial weeding, chemical weeding techniques can be adopted, and it is best to use soil treatment before sowing. The medicament can be selected as follows: 33% Caicaotong 150 grams per mu or 48% trifluralin 100 grams per mu, the weeding effect is good. Should also use stem and leaf treatment, medicament can choose: 10.8% cover grass can 30 grams per mu or 8.8% Jingke grass can 30 grams per mu.

3. Fertilizer and water management

Oil sunflower is relatively drought-tolerant and generally does not need irrigation, but it is watered 1-3 times under severe drought and watering conditions. 10kg diammonium per mu, 200g Yuli boron zinc, 15kg urea, 100g Yuli boron zinc, 10g Ruipaile 3000 times solution, 60g Ciba potassium dihydrogen solution twice, once every 7 days.

Weeding should be done in time at the seedling stage, and if there is no special drought in the early growth stage, it should be watered as little as possible to facilitate squatting seedlings; timely watering at the early budding stage according to the soil conditions, and irrigation in the land with irrigation conditions at the filling stage; oil sunflower is afraid of waterlogging, so flowering and pollination and mature harvest period should be considered to avoid the rainy season. The amount of fertilizer application is generally 10-15 kg per mu of urea, 10-15 kg of diammonium phosphate, 10-15 kg of potassium sulfate, or 30-40 kg of ternary compound fertilizer per mu. Topdressing 5-10 kg from budding to flowering; the quantity and method of fertilization can also be arranged according to the local actual situation.

4. Forking

It is to remove the redundant buds under the branches, leaving only one bud for each plant to ensure the normal growth of sunflower, prevent the phenomenon of more than one disk when the oil sunflower grows up, and rob the nutrients needed by the fruit on the main disk.

The principle of forking follows: "only fork but not leaf".

Handle your hands gently when you fork, so as not to hurt the stems and leaves of the trunk. Leaves are photosynthesis to provide nutrients for the disk, generally do not beat leaves, to prevent a reduction in production.

5. Artificial assisted pollination

Because sunflowers are cross-pollinated, that is to say, we have to pollinate flowers between different plants during artificial pollination.

Bees can be raised near the oil sunflower planting land and used for natural pollination. The best number of beehives is 4-5 bees per mu. At the same time, in the case of insufficient bee source, artificial pollination should be carried out in time.

The time of artificial pollination: every 3-5 days, a total of 2-3 times, the best time is 9-11:00 in the morning and 4-6 in the afternoon. Artificial pollination is prohibited on cloudy and rainy days, which can reduce the empty shell rate of sunflower seeds.

6. Regular inspection

We should pay special attention to the stealing and eating of oil sunflower fruit by birds and livestock, and inspect the sunflower land regularly every day to solve the problem as soon as possible.

The above is the introduction of the planting technology of short big-headed oil sunflower. I hope it will be helpful to everyone.