High-yield wheat read "five-word classics"
“Zhang Zhangchang, I did not buy less of the good wheat varieties that my family planted year after year. I didn't use less fertilizer. I didn't play with pesticides, but I couldn’t get the output. Didn't this technology have any key technology?†10 On the 12th of the month, when Zhang Da, an agronomist and agricultural technology station chief of the Nanjiang County Bureau of Agriculture, came to the village of Yanshan Township, Wang Nengshan, the villager who was preparing to plant wheat, prepared a question. Zhang Dalai seriously answered: "Wheat must be high-yield, and we should read the five-word scriptures of species, fat, removal, control, and defense." Standardized sowing Before sowing, it is necessary to finely prepare the soil and open the “three channelsâ€; for seeds without seed coating agent, use 40% methylisophosphorus or 50% phoxim, and select seeds according to 0.2% of seed amount to prevent and control underground pests. To prevent sheath blight or seedling stage rust and powdery mildew, it is also possible to use 0.15%-0.2% of the seed amount when dressing at the time of sowing; when sowing, the seeds are spread evenly, and the seeding rate per acre is controlled at 8-10 kg. Seedlings should be maintained at 15-18 thousand plants; seed spreading depth should be 3-4 cm. It should be too light, easy to fall and dry, and seedling emergence should occur. Too deep seedlings should cause low seedling emergence and affect the occurrence of tillers and secondary roots. Easy to form weak seedlings; sowing season should not be too early and too late, there will be Wang Miao before premature winter, more consumption of fertilizer; too late, young seedlings, wheat seedlings are not strong. In general, in our northeastern Sichuan region, the suitable sowing date for winter wheat is from October 20 to October 30. After the emergence of seedlings in a timely manner to keep Miao Qi Miao whole seedlings uniform. Formula fertilization Under normal circumstances, winter wheat requires 14-16 kilograms of nitrogen fertilizer, 8-10 kilograms of phosphate fertilizer, and 8-10 kilograms of potassium fertilizer. It is necessary to re-apply organic fertilizer, generally 2000-3000 kilograms of organic fertilizer can be applied per acre, and the soil lacks trace elements. , should apply fertilizer. After the nitrogen fertilizer is properly relocated, the ratio of base fertilizer and topdressing fertilizer is applied at 7:3 or 6:4; phosphate fertilizer, potash fertilizer, and trace fertilizer can all be used as the base fertilizer. When topdressing nitrogenous fertilizers, it is necessary to give priority to the use of jointing fertilizers. General sowing before the application of 40 kg of compound fertilizer per acre base fertilizer, while the application of 5 kg of urea as a seed fertilizer; end of February - early March to see seedlings topdressing 7.5 kg -10 kg of urea for jointing fertilizer, late combination to prevent pests 1-2 times Foliar spraying fertilizer. Chemical weeding Before the winter wheat is the best time for chemical weeding. Before and after the 3-leaf wheat stage, it is possible to use 6.9% humus emulsion 40-50 ml/mu, or wheat pole 20-30 g/mu, and water 30 kg for stem and leaf spraying. Chemical weeding is performed in spring for plots with poor weeding or no chemical weeding before winter. When weeding chemically, we must master the soil moisture content, spray dose, and spray methods to avoid phytotoxicity. Chemical regulation When wheat or wheat seedlings have a long-term trend in early sowing, they must be promptly repressed during the period of 4 leaves, 1 heart to 5 leaves and 1 heart, and chemical control measures can be taken. Each mu with 15% of paclobutrazol powder 30 to 40 grams is mixed with 30 kg of water. Once sprayed, the severely prosperous plots can be sprayed once before jointing. Pest control The principle of prevention shall be the basis for the application of pesticide seed dressing before sowing, and pest control shall be well controlled. Generally, in late February, use 12.5% ​​wolfberry fruit 15-20 grams per acre or 20% triadimefon 60-80 grams, or 15 tons add water 50 kilograms, aim at the base of wheat seedlings, spray once in 15 days, and even prevent 2 Second, control of sheath blight. In the middle and late March of each month, the use of triadimefon EC 75 ml or Xiu Te 15 ml plus anti-influx 10 grams plus 80 kg of water, control wheat powdery mildew, rust and aphids. In late April, use rustin 75ml or Sewet 15ml, or 15% triadimefon 100g, or 12.5% ​​pod 40g water 50kg spray to prevent rust, with 50% anticonazole 10g, plus 2.5% bromine Permethrin or 50% phoxim is mixed with 2% urea aqueous solution (1 kg urea + 50 kg water) and sprayed to control wheat ear blast and midge. In the period of heading and flowering, if there is continuous rainy weather for more than three days, 50% carbendazim WP 100 g and 30 kg of water should be sprayed immediately to prevent head blight and rust. When the amount of 100 strains of wheat earworms reaches 500, the mu should be sprayed with 2.5% siphonicin emulsifiable concentrate 20-25ml or 50% anti-influx 10g or 10% imidacloprid 10g watered 50kg to control foliar spraying. . 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