Warm cotton, sowing late, generally sowing in late April, about two months before the emergence of land idle period, after the emergence of slow growth, but also large ridge planting, until the cotton tree in July can completely cover the ground, so cotton pre-light The utilization of energy and land resources is low. The oil sunflower has strong cold resistance and can be planted as soon as it is sown. It can be sowed when the land is frozen and frozen. When the ground temperature reaches 5 degrees, it can germinate. The seedling stage is not afraid of frost and grows quickly. Early maturing varieties can be harvested at the end of June and early July, making full use of light energy and land resources to reach oil. Kwai cotton double harvest.
1. Select early-maturing short heads for variety selection, early spring and short-blossom spring sowing 85-90 days mature, plant height 0.8-1.2 meters, plant growth robust, orderly, compact plant type, strong resistance to disease and lodging, high oil content, use the variety Interplanting, short symbiosis period, not competing with the cotton sun, does not affect the growth of cotton, is the ideal variety of intercropping intercropping, is also the preferred varieties of wheat in the Northwest region after the broadcast.
2. Mode of planting Conventional cotton is planted with cotton of 4040100 cm in size, sunflower is planted in the middle of large rows, sunflower plants are 20-25 cm apart, 2500-3000 acres are planted, 30 cm of cotton plants are planted, and 3500 plants are planted in acres. Hybrid cotton using 1-1.2 meters row spacing, planting oil sunflowers between rows, spacing of 20 centimeters, leaving about 3000 seedlings, oil sunflower planting at the beginning of March, should sooner rather than later, cotton sowing in late April, oil sunflower film covering can be a week in advance Harvested.
3. Field management Oil sunflower grows rapidly in the early stage and requires large amount of fertilizer. Therefore, the base fertilizer must be fully applied. The use of farmyard manure 3000-4000 kg, superphosphate 50 kg, potassium sulfate 15 kg, urea 15 kg or compound fertilizer 30-50 Kilograms, pouring enough water at the bottom, deep-rolling pressure, soil preparation, 2 seeds per hole, depth 3 cm, after emergence and time seedling cultivator. Before the flower buds are not very arid, generally do not need watering to prevent leggy; after budding, combining topdressing with water, putting bee or artificial pollination can increase production by 10-20%. When the flowers are loose powder, use a towel or sponge to wipe the flower disk, and pollinate 2-3 times throughout the flowering period. Watering after flowering guarantees the supply of moisture, which is conducive to the absorption of nitrogen, phosphorus and potassium in large quantities, so that the grain is full and full of rice. The yellowing of the back of the disk can be harvested for 3-5 days.
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