For the high-yield cultivation of summer maize, middle-late and late-maturing high-yielding compact maize varieties were selected, and wheat crops were interplanted and changed to live after harvest; appropriate dense planting was established to establish a reasonable population structure to ensure the population density and uniformity, and the harvest was completed.
1, species selection.
The medium-late and late-maturing high-yielding compact maize varieties are selected for dense planting, strong resistance, and mature living trees. The growth period is 100 to 105 days, and the effective accumulated temperature is 1200°C to 1500°C. Zhongjian type selected Zhengdan 958, Daiyu 35, Agrochemical 101, etc., Large-spike type selected Daiyu 16.
2, promote the summer corn robbing live broadcast technology.
Wheat interplanted with wheat was changed to live in the summer after the wheat was harvested, ensuring that it was planted before June 15. After wheat harvest, the crop can be cultivated and destroyed in time, enough for mechanical sowing, or the summer live robbers, the height of which remains less than 40 cm. Seeds of equal spacing or size are used for sowing, with a row spacing of 60 centimeters; for rows, the large row spacing should be 80 centimeters and the small row spacing should be 40 centimeters). The sowing depth is 3 to 5 cm. In order to ensure that Miao Qi, Miao Quan, according to the lyrics, cast water after pouring.
3, rational close planting.
Zhengdan 958 seedlings 4500 ~ 4800 / mu, plant spacing 20 cm, Sai Yu 16 left seedlings 3500 ~ 4000 / mu, plant spacing 25 cm. The sowing amount is generally 2.5 to 3 kg/mu, which should be increased or decreased according to the variety characteristics.
4. Formulated fertilization.
According to the soil nutrient status and the target yield, determine the amount of fertilization, implement soil testing and formula fertilization to balance nitrogen, phosphorus, potassium, and sulfur nutrition; corn high yield field (700 kg or more). Mushi formula corn fertilizer requirements 80 kg. Apply twice. For the first time, 30 kg of Mushi was applied at the time of sowing, or 30 kg of mu was applied at the seedling stage (before maize 5 leaves). The second time in the corn big bell period (55% to 60% of the leaf age index, the 11th to 12th leaves were unfolded), 50 kg was applied in the first round; the general field (500-600 kg per mu). Mushi corn formula fertilizer is required 60 kg. Apply twice. For the first time, 20 kg of Mushi was planted at the time of sowing, or 20 kg of Mu was applied at the seedling stage. The second time in the big bell season, 40 kg was applied.
5. Field management.
(1) Chemical weeding. Before emergence, 50% acetochlor EC is applied to the ground with 50% acetochlor EC to 30-50 kg water or 40% BTX water suspoemulsion 200 ml to 50 kg water.
(2) Appropriate time seedlings and seedlings. After cultivating the seedlings, the cultivators will be cultivated in time, the ridges will be destroyed and the roots will be pulled down. Three-leaf seedlings, five leaves Dingmiao to prevent seedling shortage.
(3) Watering in time to prevent soil drought. In the case of planting enough seeds, it is generally not necessary to water in front of the small bellmouth, and irrigation must be conducted in case of drought. At noon, the leaves of corn are curled, and they can be stretched at other times without having to water the emergence water and the jointing water interval. After entering the big bell mouth period, it cannot be short of water.
(4) Weeding and weeding. The culturing is usually performed 2 to 3 times before the big bell stage.
(5) Control of pests and diseases. Timely control of diseases and pests such as dwarfism, armyworm, thrips, corn borers, aphids, and earworms.
(6) Pull out weak plants. In the small bell-mouth period, small weak strains were removed in a timely manner to improve the uniformity of the population, ensure the robustness of the plants, and improve the ventilation and light transmission conditions of the population.
(7) Chemical regulation. During the jointing of corn to the small bell-mouth period, safe and efficient plant growth regulators (such as sturdy, paclobutrazol, brassin, etc.) should be reasonably sprayed on maize that grows too vigorously to prevent corn lodging.
(8) Artificial detasseling. One-half of the whole tassels (interlaced or septum) are removed when tasseling, and the remaining tassels are removed after pollination is completed.
(9) Artificially assisted pollination. Large populations of high-yield plots overlapped with leaves, and individual plants were difficult to pollinate. In the late pollination period, the plants were examined on a plant-by-plant basis. Artificially assisted pollination was performed on unfertilized fresh filaments to increase the number of grains per spike.
(10) Remove empty strains. Ten days after the end of the supplementary pollination, field plants were examined on a line-by-line basis and the empty plants were removed.
6. Appropriate late harvest. Under the premise of striving for early planting, summer corn should be collected as late as possible. Usually harvested after September 20. With appropriate late harvest, corn can generally increase production by about 5%.
1, species selection.
The medium-late and late-maturing high-yielding compact maize varieties are selected for dense planting, strong resistance, and mature living trees. The growth period is 100 to 105 days, and the effective accumulated temperature is 1200°C to 1500°C. Zhongjian type selected Zhengdan 958, Daiyu 35, Agrochemical 101, etc., Large-spike type selected Daiyu 16.
2, promote the summer corn robbing live broadcast technology.
Wheat interplanted with wheat was changed to live in the summer after the wheat was harvested, ensuring that it was planted before June 15. After wheat harvest, the crop can be cultivated and destroyed in time, enough for mechanical sowing, or the summer live robbers, the height of which remains less than 40 cm. Seeds of equal spacing or size are used for sowing, with a row spacing of 60 centimeters; for rows, the large row spacing should be 80 centimeters and the small row spacing should be 40 centimeters). The sowing depth is 3 to 5 cm. In order to ensure that Miao Qi, Miao Quan, according to the lyrics, cast water after pouring.
3, rational close planting.
Zhengdan 958 seedlings 4500 ~ 4800 / mu, plant spacing 20 cm, Sai Yu 16 left seedlings 3500 ~ 4000 / mu, plant spacing 25 cm. The sowing amount is generally 2.5 to 3 kg/mu, which should be increased or decreased according to the variety characteristics.
4. Formulated fertilization.
According to the soil nutrient status and the target yield, determine the amount of fertilization, implement soil testing and formula fertilization to balance nitrogen, phosphorus, potassium, and sulfur nutrition; corn high yield field (700 kg or more). Mushi formula corn fertilizer requirements 80 kg. Apply twice. For the first time, 30 kg of Mushi was applied at the time of sowing, or 30 kg of mu was applied at the seedling stage (before maize 5 leaves). The second time in the corn big bell period (55% to 60% of the leaf age index, the 11th to 12th leaves were unfolded), 50 kg was applied in the first round; the general field (500-600 kg per mu). Mushi corn formula fertilizer is required 60 kg. Apply twice. For the first time, 20 kg of Mushi was planted at the time of sowing, or 20 kg of Mu was applied at the seedling stage. The second time in the big bell season, 40 kg was applied.
5. Field management.
(1) Chemical weeding. Before emergence, 50% acetochlor EC is applied to the ground with 50% acetochlor EC to 30-50 kg water or 40% BTX water suspoemulsion 200 ml to 50 kg water.
(2) Appropriate time seedlings and seedlings. After cultivating the seedlings, the cultivators will be cultivated in time, the ridges will be destroyed and the roots will be pulled down. Three-leaf seedlings, five leaves Dingmiao to prevent seedling shortage.
(3) Watering in time to prevent soil drought. In the case of planting enough seeds, it is generally not necessary to water in front of the small bellmouth, and irrigation must be conducted in case of drought. At noon, the leaves of corn are curled, and they can be stretched at other times without having to water the emergence water and the jointing water interval. After entering the big bell mouth period, it cannot be short of water.
(4) Weeding and weeding. The culturing is usually performed 2 to 3 times before the big bell stage.
(5) Control of pests and diseases. Timely control of diseases and pests such as dwarfism, armyworm, thrips, corn borers, aphids, and earworms.
(6) Pull out weak plants. In the small bell-mouth period, small weak strains were removed in a timely manner to improve the uniformity of the population, ensure the robustness of the plants, and improve the ventilation and light transmission conditions of the population.
(7) Chemical regulation. During the jointing of corn to the small bell-mouth period, safe and efficient plant growth regulators (such as sturdy, paclobutrazol, brassin, etc.) should be reasonably sprayed on maize that grows too vigorously to prevent corn lodging.
(8) Artificial detasseling. One-half of the whole tassels (interlaced or septum) are removed when tasseling, and the remaining tassels are removed after pollination is completed.
(9) Artificially assisted pollination. Large populations of high-yield plots overlapped with leaves, and individual plants were difficult to pollinate. In the late pollination period, the plants were examined on a plant-by-plant basis. Artificially assisted pollination was performed on unfertilized fresh filaments to increase the number of grains per spike.
(10) Remove empty strains. Ten days after the end of the supplementary pollination, field plants were examined on a line-by-line basis and the empty plants were removed.
6. Appropriate late harvest. Under the premise of striving for early planting, summer corn should be collected as late as possible. Usually harvested after September 20. With appropriate late harvest, corn can generally increase production by about 5%.
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