1. Choose the best species. In spring mulching cultivation, varieties with good early maturity, strong resistance to disease and strong adaptability should be selected. Such as short head 567DW, 667DW and other varieties.

2. Soil preparation and fertilization. The root of oil sunflower is huge, and the deep conversion of cultivated land can meet the requirements of deep rooting and absorption of water and fertilizer. The depth of tillage should be stabilized at 20 to 23 cm on a year-by-year basis. When ploughing, the farmer's fertilizer is 3000 kg and the compound fertilizer is 50 kg.

3. Sowing at the right time. The spring sowing should be sown in the 5 cm soil layer for 4 to 5 days at 8 ° C to 10 ° C. The suitable period in the south central part of the province is mid-March. It can be used to order single or double-grained acupoints or to order 2 capsules per hole. The amount of acre is 400-500 grams. The seeding density is determined by the ground force conditions. The row spacing is 50 cm, the plant spacing is 30-40 cm, the sowing depth is 3-5 cm, the fertilizer land is about 4000 seedlings, and the thin seedlings are 4000-4500 plants.

4. Field management. Oil sunflower seedlings require less water and have stronger drought resistance. It is advisable to carry out seedlings to promote root growth. The flower bud period is the critical period of water demand. If the weather is dry, it is advisable to combine the watering and ditching to apply 20 kg of compound fertilizer, and the depth of fertilization is 8 to 10 cm. Flowering and filling stage is also a critical period of water demand. If it is drought, it should be watered in time. Although oil sunflower is drought-tolerant but not resistant to sputum, if the rain is too large, it should be drained in time. The majority of oil sunflower pollination is done by means of insects. If the weather is not good during flowering pollination or there are fewer pollinating insects, pollination can be done by means of stocking bees or artificial pollination, and the discs can be gently rubbed together.

5. Prevention and treatment of insects. The underground pests of the oil sunflower seedlings can be trapped by poison baits. In the middle and late period, it is mainly caused by oil sunflower aphids and cotton bollworms. When the control index is reached, it can be sprayed with high-speed cypermethrin emulsifiable concentrate 1000 times. The main disease of oil sunflower is the sclerotinia disease. It is found that the field plants should be cleaned up in time, and the sclerotia net is used. Chemical spray control.

6. Harvest at the right time. Generally, about 30 days after the final flowering, 4 to 5 leaves and stalks on the upper part of the plant and the back of the stalk turn yellow, the seed shell becomes black or hard, and the seeds are full and can be harvested in real time. The early spring mulching cultivation is generally in late June. Or harvest in early July. After the harvest, the oil sunflower dish should be spread out, aired, threshed, cleaned, and stored in time.

Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone

Lactic Acid

Lactic Acid,Biodegradable Lactic Acid,Lactic Acid Liquid,Poly Lactic Acid

SHANDONG BAISHENG BIOTECHNOLOGY CO., LTD , https://www.baishengbioproducts.com