Second, the application of joint fertilizer, promote strong stalks and ears. The jointing fertilizer has the effect of consolidating the tillering into the panicle and promoting the strong culm and the big ear. The main focus of the spring management of the rice and barley fields in the Jianghuai wheat region is the application of joint fertilizers, which generally require a faded leaf color in the plant population. The first part of the base will be topped with a fixed length, and the urea will be applied in 10-15 kilograms of urea. Phosphorus and potassium fertilizers are also available. At this point make up the amount to prevent premature aging, increase grain weight, increase production. For wheat fields where the groups are too large and the leaves are not normally faded, jointing fertilizers should be postponed as appropriate to prevent lodging. For wheat fields with insufficient number of spikelets in the group, jointing fertilizer can be applied earlier. Third, supporting the ditch, drainage and drainage. Waterlogging is one of the important limiting factors affecting the high yield of wheat in the South. It is necessary to do a good job of supporting the ditch in the early spring. For the undistributed intercropping wheat fields, the three trenches within the field shall be dug and digging; for those that have been trenched, the supporting facilities shall be dredged in a timely manner. After the winter freeze-thaw cycles and the field rafts fall, it is necessary to timely dig trenches and build rafts. The ditches communicate with each other to ensure smooth drainage and prevent waterlogging. Fourth, the spring freeze defense and remedy. From mid-March to mid-April to mid-April, there are often cold waves from the north to the south. At this time, if the temperature drops below minus 3°C and lasts for 6-7 hours, the jointed wheat seedlings will suffer spring frost damage. The heavier the damage caused by freezing. After the cold injury occurs in wheat in spring, the first step is to investigate the degree of freezing of young panicles 2-3 days after the low temperature; the second is to resume the application of fertilizer to the wheat field where the frozen mortality rate of stem stems exceeds 10%. The average mortality rate of frozen stems in 10-30% of wheat fields, acres of urea can be 4-5 kg, 30% of the frozen stems of wheat field stem mortality increased by 10 percentage points per mu need to increase 2-3 kg of urea The upper limit value should not exceed 15 kilograms, strive for high-section delivery, and reduce production loss. Fifth, chemical weeding, disease prevention and pest control. Returning to the green period is a high incidence of weeds in the field. Chemical weeding and weed control should be timely. Forecasts of pest and disease damage will increase this spring, so we must strengthen the monitoring and control of powdery mildew, head blight and sheath blight.
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Hyaluronic acid is a high molecular weight polysaccharide
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I. Early return of green manure due to seedling production and promotion of late seeding weak seedlings. For late sowing, large amount of straw returning, insufficient amount of base fertilizer, yellow, thin, small and weak seedlings that have been defertilized and yellowed, requiring a 10- to 30-kilogram three-component fertilizer , To promote hairy roots, long pods, and ears. For interplanting wheat fields, Mushi organic fertilizer 1500 kg and ternary compound fertilizer 10-15 kg, to promote weak seedlings turn strong, early spring wheat seedlings, improve the rate of tillering spike. For the wheat field where the total number of stems in the population is relatively large and the leaf color is normal, it is not appropriate to apply back green manure to ensure stable growth in the medium term.