Summer corn jointing booting three major tube

(1) Filling enough water: People often say: “There is fertilizer in dry areas, crops are dry in the eyes”, “There is no fertilizer and no water in the crops, and the crops are dirty.” After the summer maize joints, the stems and leaves grow fast, and the water needs to be large. During the peak period of water demand, especially between 10 days before tasselling and 20 days after flowering, corn is the most sensitive to water and it is the critical period of water demand. At this time, water shortage, young ear development is not good. In severe cases, the tassels cannot be pumped out, and the spit silking of the ear can not be fertilized normally. The lack of grains, bald heads, and more empty rods cause the corn to reduce its production. A water-saving irrigation can increase production by about 22%. Sprinkling heading water can increase production by more than 70%, irrigation and attacking granular water can increase production by 50%. It can be seen how important it is to draw water from the booting season. When irrigation conditions are poor, it is better not to water for other periods, and water supply during booting and heading should also be ensured. We should intensify the cultivating of arable crops during the jointing stage of summer maize and intercropping stalks in order to ensure sorghum.
(2) Applying good fertilizer: “The high yield of maize is not high yield, and the whole is in the jointing and booting stage.” The maize enters the jointing stage, grows vigorously, and the internal female and tassels rapidly differentiate. It is the fastest growing period and requires a lot of nutrients. In order to meet the nutritional needs of corn and achieve large grain filling, it should be followed by joint-fertilization. It should be applied when 6-7 leaves are unfolded. Generally 800-1000 kilograms of water in Mushi, 3-4 kg of urea, mixing points, apply. Appropriate re-applying booting fertilizer has a key effect on yield increase, which generally can increase the yield of summer corn by 15-20%. When corn enters the big bell-mouth period, it is the most suitable period for applying panicle-fertilizer. At this time, positive spikelets and floret differentiation are the key stages in determining the size of the ear and the number of grains. It should be applied 10-15 days before the corn tasseling. It depends on land strength and growth. Poor fertility, less basal fertilizer, weaker growth, should be applied to 1500 kg of Mushi glutinous manure, mixed with 7-8 kg of urea, acupuncture or planting facilities, maize in the middle field, 1,000 kg of fertilizer in Mushi, and 5-6 kg of mixed urea. Growing vigorously, 600 kilograms of manure followed by manure, urea 4-5 kg.
(C) Governance corn borer: "The length of the corn is good or bad, control of borers (corn borer) is the most important." Corn enters the booting stage, is the period of corn maniac activity. Light inhibits corn growth and in severe cases causes reduced production. When corn enters the booting stage, the following drugs should be promptly used to kill corn mash: 1.5% phoxim granules, 0.25 kg per mu, and 2-3 kg of fine soil, and mix evenly into the heart and leaves of plants. With 90% crystal trichlorfon, watered with water 1000 times mixed with irrigation leaves, 100 per kilogram of medicine leaves perfusion. With 5% 1605 emulsion 0.55 kg, mixed with 50-100 kg of sand to spread the heart, 5 kg per acre. The use of any of the above agents to control corn borer has a good effect.

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