Dry goods sharing! Corn planting "one increase and three change" technology
Corn, also known as maize, corn, gluten, rice, and millet, is one of China's important food crops and feed crops. In the process of planting corn, common pests and diseases include sheath blight, large and small spot disease, corn borer, corn iron beetle, cockroach, cockroach, and ground tiger. The next small series will specifically talk about corn planting related matters. First, technical advantages Each acre can increase 500-1000 pigs, increase soil organic matter, cultivate soil fertility, and increase corn yield. Second, technical points (1) Selection of good varieties Common good varieties are: Zhengda 999, Guidan 688, Pacific 98, Ruiheng 269, AirAsia 639 and other high-yield multi-resistant hybrids. (2) Timely early broadcast Spring corn: sows when the average daily temperature is above 12 degrees. Summer corn is sown in mid-April. Autumn corn is planted in early July to mid-July. (3) One seeding 1, fine land preparation After the spring, it is necessary to re-plow the ridge and plant the ridge. For the hard dry land, the plough will be planted in the ground after the spring, and the dry land will be directly planted without no-till. 2, seed preparation Using coated seeds, 2-3 kg per acre is planted. 3, planting methods (1) Single row and double planting The line distance is 80cm, the plant distance is 50cm, and 3 holes are planted in each hole, leaving double seedlings. (2) Double row planting The distance between the large rows is 80cm, the distance between the small rows is 40cm, and the distance between the plants is 33cm. Two holes are planted in each hole, leaving a single seedling. (3) Single row planting The distance between the rows is 60-65 cm, the distance between the plants is 25-30 cm, and 2 seeds are seeded at each hole, leaving a single seedling. (4) Scientific fertilization 1. Fertilization period and method Base fertilizer applied at the time of sowing a. The base fertilizer should be applied when the corn is planted. b. Sowing the manure water after planting it at the bottom of the ditch. When fertilizing, it should be noted that the fertilizer cannot be directly contacted with the seed. c. When the corn planting grows 4-5 leaves, apply the seedling fertilizer, and grow to 7-9 leaves, that is, after the jointing, look at the seedlings to attack the stalk fertilizer. d, corn big trumpet period, that is, 7-15 days before the corn is plucked, re-applying the attack fertilizer. 2, the amount of fertilizer Pure nitrogen 12-14kg, phosphorus pentoxide 4-5kg, potassium oxide 11-12kg, the amount of fertilizer can be determined according to the actual situation of corn planting. (5) Drought-resistant cultivation a. Promote practical techniques such as no-tillage cultivation techniques, mulching techniques, and intercropping of crop straw. b. Spring mulch corn can be planted 7-10 days earlier than open corn. (6) Pest control 1, the principle of prevention Take a combination of agricultural control, biological control, physical control and chemical control to prevent pests and diseases. 2, environmental protection If the conditions permit, you can choose the frequency vibrating insecticidal lamp. Each frequency vibrating insecticidal lamp can effectively control the corn area of ​​40-50 mu, or use green prevention and control technology such as sex attractant and biological pesticide to prevent and control pests and diseases. 3, chemical control a, sheath blight, size spot disease: in the early stage of the disease, with 50% antibacterial, 70% methyl thiophanate wet powder spray control. b. Corn bran: In the corn trumpet period, 50% methyl parathion or 2.5% enemy killing per acre is used to control corn borer. c. Corn iron beetle: 10% cypermethrin and 50% badamin larvae are used when the egg hatching rate reaches 10%. d, cockroaches, cockroaches and other underground pests: 50% phoxim emulsifiable concentrate before planting, mixed with fine soil at a ratio of 1:200 to make toxic soil, and apply 30 kg/mu of soil when planting. e. Ground tiger: In the corn seedling stage, use 2.5% of trichlorfon powder 1.5 kg and 22.5 kg of fine soil per acre to mix and control the tiger. 4, chemical weeding The corn field weeds are blocked by using pre-emergence herbicides such as Yu Nong Le and other pre-emergence herbicides such as acetochlor.
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