High yield of soybean must be controlled by ten hurdles.

First, according to the local climate, land fertility, soil properties, growth period, precipitation, effective accumulated temperature, production level, cultivation model and other factors, select high-oil and high-protein varieties with strong resistance and high yield.

Second, we should close the soil preparation to soil tillage, adhere to the soil tillage system of the combination of loosening, turning, raking and rotation, and vigorously promote the subsoiling tillage method, which is 40-50 cm deep, and the corn stubble for spring soil preparation should be pulped and ridged and suppressed in time to improve the quality of soil preparation so as to achieve clean soil without stubble, flat without trenches, and fine soil without bumps.

Third, it is necessary to sow early at the right time. Generally, when the daily average temperature of 5 cm below the surface is 7-8 ℃, it is a suitable sowing time for soybeans, and the sowing date should not be too early, because the temperature is low, the seedlings emerge slowly, and the seedlings are prone to rot and disease, resulting in lack of seedlings, sowing too late, can not make full use of the growth period, affecting the normal maturity; sowing methods, the use of mechanical precision sowing Sowing quality, uniform seed without broken strips, no resowing, no missing sowing, consistent soil covering, which not only prevents the seeds from going to the cellar, but also prevents the seeds from being exposed.

Fourth, field inspection should be carried out after sowing, and it is found that there is a broken space in the seedling, replanting in time, replanting on the spot, carrying more soil and sitting water, so as to improve the survival rate; if the seedling condition is less than 50%, it is necessary to select precocious varieties and pay close attention to the destruction of seeds. strengthen management. In short, it is necessary to do a good job in checking seedlings, replanting or replanting, so that the whole seedling is strong.

Fifth, hold the deep loose pass as a soybean supply to the cotyledons unearthed, carry out deep loosening, "beans top valve, not afraid of soil cover." Deep pine has many benefits: good grass control effect, grass control rate of more than 90%; squatting seedlings to promote early growth and rapid development; increase soil temperature by 2-3 ℃; dredge soil, activate soil, accelerate soil organic matter mineralization; release cold to increase temperature and prevent water evaporation.

Sixth, fertilizing and increasing the application of farm manure, generally applying more than 15 tons of high-quality agricultural fertilizer per hectare as base fertilizer, while applying 300 kg of three-element compound fertilizer per hectare as base fertilizer; reasonable topdressing, that is, early topdressing, usually 3-5 kg urea per mu when the first compound leaf is unfoliated, and appropriate amount of phosphate fertilizer at the same time Apply good flower fertilizer, soybean flowering period is the peak of fertilizer demand, generally apply 5-7 kg urea per mu, it is appropriate to add phosphorus and potassium fertilizer, apply 7-10 kg calcium phosphate or potassium fertilizer per mu, supplement grain fertilizer, generally spray 0.5% urea solution of 2% calcium superphosphate, 50 kg per mu.

Seventh, the fixing of soybean seedlings can be carried out twice. For the first time, when 1-2 true leaves of soybean are grown, pimple and crowded seedlings are removed, and when 2-3 true leaves are grown, thin and miscellaneous seedlings are removed. Generally, the monopoly distance is 1.2-1.3ft, the plant distance is about 6 inches, and there are 7500-8000 seedlings per mu, which are reasonably closely planted.

Eight is to control weeding three times, to do a good job of weeding; the second is chemical weeding, using 2500-3000 milliliters of Acetochlor EC per hectare, adding 2500-1000 milliliters of 70% Acetochlor EC or 48% Guangmianling EC. Stem and leaf treatment, weeds 2-4 leaf stage, control Gramineae weeds, 9-1500 milliliters per hectare of refined grass EC; control broadleaf weeds, 1000-1500 milliliters per hectare of fluosulfenesulfen aqueous agent, spray 200kg of water; application in autumn, 72% dole 2500-3500 ml per hectare plus 48% trimethoprim 800-1000 ml spray; when grass seeds are formed in early August, pull up the field weeds.

Ninth, under the condition that soybean plants are in danger of lodging due to overgrowth, chemical control agents such as Fengshoubao are sprayed to protect flowers and pods, prevent lodging and increase production obviously.

Ten, the main diseases and insect pests of soybean are cyst nematode, root rot and root maggots, which can be controlled by soybean seed coating agent, and more than 50% of the seed amount of 0.5% of soybean root rot can be used to control soybean root rot disease. to control cyst nematode disease, 2% soybean root preservative can be used to control cyst nematode disease and prevent root rot at the same time. In addition, it is necessary to control gray leaf spot, downy mildew, seedling pests, red spiders, aphids, meadow borer, soybean heart borer, etc., and do a good job in field prediction and forecast. Once it occurs, choose suitable pesticides, combined with other measures, to carry out comprehensive control.