Technical Overview: There are mainly two cropping modes, wheat and rape, and cotton in Jianghan Plain and Edong Cotton Region. The output and benefits of the former crops, wheat and rape, are generally not high. To improve the overall benefits of the annual cotton field and achieve high yields and efficiency of grain and cotton, we summarized the experience of years of popularization of high-yield, high-yield and high-yield modes of cultivation of corn and cotton in Hannan District, Wuhan City. We conducted a normative experiment to further improve this technology. In the province to carry out demonstration and promotion. Increased production and efficiency: The production of fresh corn has about 3000 spikes, the output value is more than 1,500 yuan, or more than 400 kg of dry corn, and the output value is about 1,000 yuan. The cotton output is slightly increased or equaled with that of wheat or cotton. The annual output value increased by more than 400 yuan compared with the wheat-cotton model, and the grain output increased by more than 100 kg. Compared with the oil-cotton model, the output value of mu increased by more than 600 yuan. Technical points: (1) Corn cultivation. 1 Select a good seed and sow at the right time. Maize plants are selected for compact planting of medium and large spikes of sweet corn or common corn varieties with a plant type of about 100 days; the corn should be sowed early; the suitable sowing date for sweet corn is from mid-late to late-March, and the normal corn sowing time is at the end of February 3 The beginning of the month is appropriate. 2 plastic film covering, warming and protecting the earthworms. After sowing, the corn robbers should be covered with a 60-cm wide plastic film in time. The seedlings should be seeded in the cold-cold-head warmer weather, and the seedlings should be checked for seedlings immediately after the seedlings were added. The sweet corn can be planted with double membranes in mid-February to prevent freezing damage. 3 narrow line width, rational close planting. About 3,300 maize plants were planted at a density of 200 centimeters and 10 centimeters, that is, a row spacing of 200 centimeters and a plant spacing of 10 centimeters. To keep the fields airy and transparent, corn should be planted in the north-south direction. 4 Timely adjustment and control of plant height. In order to reduce the shading effect of high maize plant height on cotton, a joint of jade and gold (20 ml) was sprayed with 10-15 kg of water at the jointing stage (6-9 leaf stage) of corn, and after corn pollination and male pollination, timely Pull out the tassel. 5 Scientific fertilization. Apply 18 kg of pure nitrogen per acre, 6 kg of phosphorus pentoxide, 15-18 kg of potassium oxide, 1 kg of zinc sulfate, 70% of base fertilizer, 10% of seed dressing, and 20% of large bellmouth fertilizer. 6 prevention and control of pests and diseases. Focus on the prevention and control of corn sheath blight, head smut and corn borer, used in the big bell mouth period with BT soil lost the heart or tasseling powder spray control corn borer. 7 timely harvest. Sweet corn is harvested and marketed in time between 20 and 28 days after pollination, and dry corn is harvested in time at the end of June and beginning of July. (2) Cotton cultivation. 1 Select good breed. Cotton selection is resistant to disease, insect resistance, premature aging and high-yielding hybrid cotton F1 cotton. 2 Breeding strong seedlings. In the middle and late April, nutrition seedlings are used to grow seedlings, and the seedling age is controlled within 30 days. 3 timely transplanting. In mid-May, the cotton was transplanted into the broad row of corn. Each row was transplanted with two rows of cotton. The cotton spacing was 90 centimeters, and the cotton and maize were separated by 55 centimeters. 4 rational dense planting. Cotton planting density is about 1500, with an average spacing of 1 meter and a 45 cm spacing. 5 scientific adjustment. In the 7-8 leaf stage of cotton, 10 kg of water is sprayed with 0.5 g of dildoxin, and 10 kg of water is sprayed with 1 g of dildoxin and 20 kg of water. In the first flowering stage, 2 to 2.5 g of dilute amine is used to spray 30 kg of water. , Full flowering period with 3 ~ 3.5 grams of dilute amine water 35 kg spray, after the top to 5 days to 7 days with 4 ~ 5 grams of condensation amine 4 to 5 grams of water spray. 6 Time cultivating and extermination. After the corn is harvested, it should be promptly culled and ridiculed, ridged and cultivated, buried with fertilizer or flower bell fertilizer. 7 scientific formula fertilization. Cotton buds can be used before the previous glutinous corn fertilizer, not alone fertilization, to control the main seedlings, the key is to combine cultivator and post-harvest application of flower and bell fertilizer in corn harvest, especially in the middle of August to apply good peach fertilizer to ensure cotton Do not premature aging, multi-junction autumn peach wins high yield. 8 Comprehensive prevention and control of pests and diseases. According to the pest forecast and forecast, the key insect pests such as locusts, red spiders, blind locusts, whiteflies and Spodoptera litura are mainly controlled. Appropriate to promote the region: the southern plains of the Yangtze River cotton area. Note: This model has strict requirements on corn plant type, growth period, promotion of early cultivation, and plant height control. The key points are: corn plant type compact, short growing period, appropriate early sowing, plastic film coverage, control of plant height, The width of the line is narrow, the width of the cabin is kept at 200 cm, and it is planted in the north-south direction. All localities shall, under the guidance of technical personnel, do a good job of demonstration and promotion in strict accordance with the technical requirements.
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