First, the output indicators: 45OO per acre density of plants, each plant 1 ear, 125 grams per ear (shelling), fresh and stable yield 50O-550 kg. 2. Variety and Seeding Rate: The variety is Suyujing No. 1, 1000 grain weight 208 grams, 4806 seeds per kilogram, germination rate can be 3364 grains according to 70% germination rate, and then 90% seedling rate, 3027 strains can become seedlings A total of 4,543 seedlings can be seeded with 1500 grams of seed, which is in accordance with the appropriate density of 4500-5000 strains per acre. Therefore, the per mu sowing volume is set at 1.5 kg. Third, the determination of the sowing date. July is the suitable sowing date, of which the most high and stable yields are planted on July 20-25. According to the following: 1. The sowing date test results for last year were: 163.0, 392.6, and 522 for the 6/20, 7/3, 7/20, 8/5, 8/10 and 8/24 sowing dates, respectively. .2, 503.7, 474.0, 0 kg, with 7/20 being the highest. 2, last year 7/20 sowing, 9/7 tasseling, 9/30 mature, broadcast a calendar period of 50 days, smoking a calendar period of 23 days. If 7/20-25 sowing is expected 9/7-15 tasselling, 9/30-10/10 harvest, 9/10-10/10 filling period of the city's temperature condition is 20-20 °C, with corn grouting suitable temperature Requires 20-24 °C, the most suitable 21-22 °C match. Fourth, determine the amount of fertilizer and fertilization methods. The fertilization amount of fresh rice with a higher output of five meters is based on the organic fertilizer 700-800 kg. The chemical fertilizer requirement is: pure N15-20 kg, P2O57 kg, K2O5-10 kg, autumn corn is only a suction fertilizer at the ear stage. Peak, fertilization method based on: Miao: De fertilizer ratio 1:2:7 as well. Therefore, it is recommended that Mushi base fertilizer has a high concentration of 12.5 kg of compound fertilizer and 30 kg of phosphate fertilizer; Miao urea 7.5 kg, potassium fertilizer 7.5 kg; ear fertilizer urea 25 kg, high-concentration compound fertilizer 5 kg. V. Field Operation Steps (1) Preparation before Broadcasting (7/15-20 Completed) 1. Daejeon 1, ploughing and soil preparation. Wheatgrass is returned to the field, ploughing and soil preparation, making it 1 meter wide, 30 meters wide, and the back surface is shaped like a bow to facilitate drainage. If the previous crop is a blank field and there are more weeds, it is necessary to spray glyphosate before plowing. 2, base fertilizer. Mushi high-concentration compound fertilizer 12 stone kilograms, carbofuran 2.5 kilograms, rotary tillage into the soil. 3, adjust the soil moisture. Fill a large ditch with water and moisten the sorghum noodles, and sow 2-3 days until the soil is dry and wet. II, seed 1, and sun seed. In sunny weather for 1 day, it promotes consistent water absorption and neat germination. 2, according to 1 kg of seed 4 water ratio soaking 1 day (40% of the corn seed weight can absorb the water to germinate), pay attention to often turn the seed, the seed to dry water. If the water is immersed, it is better to soak for half a day. According to the effect of different soaking time on corn germination rate and germination time, the germination rate was not affected within the 0-25 hours soaking time, but the seedling quality became worse as the soaking time prolonged, further extended the soaking time to more than 25 hours. The germination rate is significantly reduced. The time from the end of soaking to germination was shortened with the extension of soaking time, but the time from the start of soaking to germination was elongated with the extension of soaking time (with 0 hours extended), with 1-3 hours being the shortest. 3, germination. The soaked seeds are tiled in 2 cm thickness in indoor (not enough sun) plastic film (small amount of seeds can be spread on old newspapers), covered with wet cloth or warm straw, and germinated at natural temperature for 2 days. To dew white sowing. During the germination process, in order to prevent dryness, watering may be performed 2-3 times a day, and the amount of watering shall be less, the plastic film on the lower store shall not be directly filled with stagnant water to prevent seed nutrients from being repaired and affect the quality of the seedlings. (b) sowing (7/20-25 to complete) 1, open sowing ditch. Each line is only 25 cm away from the edge of the ditch and two shallow ditch lines are to be drawn, with a depth of 3-4 cm and a row spacing of 50 cm. 2, apply fertilizer. Mu with calcium magnesium phosphate fertilizer 3O kg applied in the sowing ditch. 3, sowing. According to the grain size 15cm single seed, sowing soil. 4, breeding supplemented seedlings. After the end of sowing, excess seeds (including ungerminated seeds) were sown and planted in field pods for seedlings and seedlings for seedlings. Note that if there are more weeds in the field, glyphosate should be used three days before sowing and then sown. Field operations such as sowing and fertilizing should be performed as far as possible in the trench to avoid the impact of solid soil on corn growth. (3) Seedling-joining period management 1. Filling seedlings. Seedlings emerged 3-5 days after sowing and about 2-3 leaves after 10 days of sowing. They were planted with soil in the field to prepare seedlings at the lack of seedlings. 2, Shi Miao Fei. In the 2-3 leaf stage, urea 7.5 kg urea, potassium 7.5 kg, 6-10 cm from the seedlings open ditch, Shi after the cover soil. 3, balance fertilizer. At the 6-7 leaf stage, fertilize small seedlings with weak seedlings by "opening a small stove," and fertilize with diluted human urea or urea to water or open holes to promote balance. 4, cure worms. If there is a locust harm, use pesticides such as methamidophos, triazophos, and alfalfa pine to prevent and treat it. 5, field management. For example, more weeds, combined with Miaofei application of cultivator weeding. In case of drought, irrigation can be done with half a ditch to fight drought. (D) Heading management 1, heavy ear fertilizer. About 40 days after sowing, the big bell-mouthed corn period, when the number of leaves visible at the end of the season was 5 leaves, 25 kg of urea and 5 kg of high-concentration compound fertilizer were applied. 2, cure locusts. Large bell mouth mu with 90% crystal trichlorfon 100 grams plus 50 kg of water, each strain 10 ml. If there is still insect infestation, one week later use dipterex to irrigate or spray once. 3, Qinggou earth. In combination with the de fertilizer, clean ditch is used once to prevent lodging. 4, pay attention to drought. (e) Taurea harvest management 1, pay attention to drought and drainage after the rain. 2, about 23 days after tasseling, the late harvest of corn milk.
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