【1】Promote seed germination and regulate seedling growth

Gibberellic acid

In high northern latitudes, low temperature (such as 10~15℃) often prolongs the germination process of spring-sown soybeans, delays germination, and reduces the germination rate. The lower the temperature, the lower the germination rate.At the same time, low temperature will increase the chance of infection of soybean sprouts, reduce the viability of seedlings, and cause uneven populations.Soaking seeds with 3.5 mg/L gibberellic acid solution for 2 hours can effectively speed up the initial germination of spring soybeans at 10-15 ℃, significantly accelerate the growth rate of young roots, and increase the fresh and dry weights of young roots.

sodium nitrophenate

Soaking seeds with sodium nitrophenolate 10 mg/L or 5-nitroguaiacol sodium 5 mg/L for 12 h can increase the bud weight, germination potential, germination rate and seed vigor of soybean.

Diethyl aminoethyl hexanoate

Soaking seeds with 160-320 mg/L diethyl aminoethyl hexanoate for 2 hours can improve the stress resistance of soybean seedling stage and promote the activity of protective enzymes under drought stress;At the seedling stage, 10 mg/L ethyl hexanoate combined with pyraclostrobin was sprayed to increase the leaf length and leaf width of soybean seedlings, increase the leaf area, thus increase the photosynthesis of the plant and promote the nutrient in the plant. Accumulation, and ultimately improve the overall metabolic capacity of plants, alleviate the damage of high concentrations of pyraclostrobin to soybean seedlings, and improve soybean stress resistance.

Kinetin

At low temperature, soaking seeds with 1 mg/L kinetin solution for 2 h can effectively accelerate the initial germination rate of spring soybeans at 10-15 °C, significantly accelerate the growth rate of young roots, and increase the fresh and dry weights of young roots.The promotion effect at 10°C is better than that at 15°C, and at 25°C, there is no obvious promotion effect.

Brassinolide

Brassinolide can increase the activity of nitrate reductase in soybean seedlings, increase the absorption and transformation of nitrate fertilizers, increase plant height and material accumulation, and improve the resistance of crops to adverse environments.On this basis, the cotyledons were sprayed with 0.01 mg/L medicinal solution after soybean emergence, and the plant height increased by 10%-15% and the fresh root weight by 40%-60% after 6 days.

Triacontanol

Seed soaking with 0.05mg/L triacontanol for 6h or seed dressing treatment with 0.5mg/kg (seed). Both can improve the germination rate and germination potential, increase the 3-kernel pod, reduce the single-kernel pod, and increase the number of beans per pod.

Chitosan

The seeds were coated with 125-165 mg of chitosan per kilogram or soaked with 1.2% liquid for 1 h. It can improve the germination rate of seeds and improve the vigor of seeds.

【2】Regulate growth and increase yield

Yield

Low-concentration yield-increasing spirits can regulate the transfer of nutrients from plant vegetative organs to reproductive organs, promote flowering, fruiting, and increase yield.During the soybean blooming to pod setting stage, spray twice with 15-30 mg/L Yield-enhancing solution, every 7-10 d, spray 30-50 kg per mu, which can promote plant growth, increase branching, and expand leaf area. Improve photosynthetic efficiency, and promote the transport of assimilates to flower pods, improve pod setting rate, and increase yield by 7% to 15%.However, premature spraying or high concentration can cause leggy and lodging. Therefore, the yield-increasing effect on vigorously growing plants is not obvious, and the yield-increasing effect on weakly growing plants and early-maturing varieties is greater.

Naphthalene Acetic Acid (Sodium)

In the peak period of soybean pod formation, 3-5 mg/L naphthalene acetic acid (sodium) liquid is used to focus on spraying the pods, which can regulate the transfer of photosynthetic products from leaves to the pods, inhibit the formation of abscission, reduce the drop of flowers and pods, and achieve early maturity and increased yield.

Benzylaminopurine

The foliar spraying of 200 mg/L benzylaminopurine at the early flowering stage was beneficial to the accumulation of photosynthetic products in leaves and improved yield.At the same time, the protein content in soybean grains is increased, the content of fatty acid components in the grains is affected, and the quality of soybeans is improved.

Zeatin

In soybean seedling stage, branching stage and flowering stage, spraying with 0.0016 mg/L 3 times can promote yield increase.

Chlorpyrifos

The foliar spraying of 1-5 mg/L liquid medicine from the initial flowering period to the full flowering period can reduce the pods, increase the number of three-grained fruits, promote the plumpness of soybean grains, and increase the yield.

Brassinolide

Apply 0.02~0.04 mg/L Brassin lactone solution once at soybean seedling stage and early flowering stage, and then once every 7~10 d, for a total of about 3~4 times in the whole period, which can promote soybean Pod setting rate, increase yield.

Sodium nitrate

Use 6-12 mg/L sodium nitrophenolate solution to spray once each at the flower bud formation stage, the early stage of pod formation and the pod expansion stage to increase the 100-grain weight of soybeans, increase the yield, and at the same time improve the quality of soybeans and increase the crude protein and crude fat content.

Diethyl aminoethyl hexanoate

At the end of flowering, spraying the whole plant with 20 mg/L diethyl aminoethyl hexanoate can promote the increase in the number of soybean pods and 100-grain weight, and the yield is significantly increased.At the same time, it can be mixed with 15 mg/L chitosan or 4 mg/L oligosaccharide to control gray spot and downy mildew.

DCPTA

After 4 true leaves, the first flowering stage and the pod setting stage, evenly spraying 30~40 mg/L DCPTA liquid can not only greatly increase the yield of beans, but also improve the quality of beans, and increase the protein and fat content.

Triacontanol

The dosage forms of triacontanol include milk powder, emulsifiable concentrate, colloidal suspension and microparticles, among which the medicinal effect of milk powder is stable.Foliar spraying can be sprayed with 0.5 mg/L milk powder solution during the full flowering period, which can make leaves greener, improve photosynthesis and material accumulation, increase seed setting rate and 100-grain weight, and increase yield by 21.1%.If other formulations are used, 0.5 mg/L liquid is also used, and sprayed once at the beginning and full flowering period.It can improve the nitrogen fixation activity of root nodules and the nitrate reductase activity of leaves at seedling stage, thereby significantly promoting the absorption of nitrogen by soybean.

Resorcinol or Salicylic Acid

Spraying 20 mg/L resorcinol or 20 mg/L salicylic acid solution at the aesculus stage of soybean can accelerate the growth of main stem, promote early flowering, and increase the number of flowering per plant, the number of pods, 100-grain weight and yield . In comparison, the treatment effect of resorcinol is better.

【3】Prevent leggy and lodging

Chlorhexidine

Soaking the seeds with 500~750 mg/L liquid for 6 hours, the liquid is suitable for submerging the seeds, which can promote the growth of plant roots, improve the water absorption capacity of roots, increase the accumulation of proline in the body, and enhance the resistance of plants to early, cold, and salinity. and disease resistance.1000~2500mg/L liquid spraying on the leaves at the early flowering stage can promote the dwarfing of plants, thick stems, prevent lodging, increase branches, increase the number of pods and seeds, and promote the purpose of increasing yield.

Choline chloride

Foliar spraying with 1000-1500 mg/L choline chloride during the flowering period can dwarf plants and increase yield.

Formaline

From flowering to pod setting, foliar spraying at 100-200 mg/L can effectively suppress plant height, promote the number of pods and increase yield.

Paclobutrazol

Paclobutrazol is generally used in vigorous crops to inhibit cell elongation, reduce plant height and improve field density. Prevent plant growth and lodging; Increase the number of main stem nodes and stem thickness, increase the number of effective branches and pods; deepen the leaf color, increase the photosynthetic capacity, and promote the transport of photosynthetic products to the grain, thereby increasing the yield.Spring soybeans are used during the sealing period, and 100-200 mg/L liquid medicine is used for summer soybeans during the flowering period. If the soil is fertile and the plants are leggy, the concentration can be appropriately increased, but it should not exceed 300 mg/L.

Uniconazole

Direct seed dressing, stuffing or mixing into seed coating agent for seed coating with dilute solution of unconazole can make soybean seedlings dwarf, and also increase stem thickness, chlorophyll content, number of branches, number of flowering plants, number of pods, Grain count and grain weight.Soaking seeds with 0.2~0.4 mg/L liquid medicine for 2 hours reduced the seedling height, increased the soybean emergence rate, stem diameter and root-shoot ratio; at the same time, it also increased the relative water content of leaves, proline (Pro) content and soluble sugar content , to promote the growth of soybean seedlings, improve stress resistance.Soybean plants sprayed with 25-60 mg/L uniconazole at the branching stage showed a decrease in plant height, an increase in stem diameter, and an increase in the number of branches, which was beneficial to increased yield and accumulation of protein and crude fat.

Triiodobenzoic acid

Triiodobenzoic acid can hinder the transport of auxin in plants and inhibit the growth of stem tops. From the early flowering stage to the full flowering stage, 100~200 mg/L of liquid medicine is sprayed on the foliage once, which can make the stems thick, prevent lodging, promote flowering and pod formation, increase yield and improve quality.. It can be used on the vigorously growing middle-ripening and late-maturing varieties or soybean intercropped with corn, and the yield increase effect is remarkable. Weak growth or very early maturing varieties should not be used.

Ethephon

After the ethephon is absorbed by plants, it releases ethylene in the body, causing physiological changes, promoting fruit ripening, making soybean plants short and strong, and increasing yield.When soybeans have 9~12 leaves, use 40% ethephon to prepare 300~500 mg/L ethephon solution, spray 30~40L of diluent per acre, which can make plants short and strong, promote fruit ripening, and increase yield.

Fonidol

The main physiological function of fenidol is to inhibit vegetative growth and promote reproductive growth; increase the nodule quality of legume crops, improve the absorption efficiency and utilization rate of nitrogen and phosphorus, increase the number of pods, the number of full grains and grain weight, and increase the yield.. Soak seeds with 100~300mg/L pyridyl alcohol liquid for 2 hours or spray 4ml of 80% pyridyl alcohol EC on the soybean seeds used per acre for seed dressing, mix well and air dry before sowing;For foliar spraying, use 200mg/L pyridyl alcohol liquid once at the beginning and full bloom period, or once in full bloom period with 500mg/L liquid medicine, which can promote plant dwarfing, more pods and grains. weight gain.

【4】Improve stress resistance

Abscisic acid and brassinolide

Under drought stress, spraying 2 mgL abscisic acid combined with 0.2~0.4 mg/L brassinolide can effectively alleviate the adverse environmental impact and maintain the normal physiological metabolism of soybean.