Soybean field management should be early fattening

In the soybean flowering stage, the stems of the plants are thick and thick, and the leaves are thick and green, and there are no spots. Field management is mainly to prevent premature aging, control the length of the child, keep the flowers and pods, and prevent falling off. Main measures:

(1) Skillfully applying flower fertilizer. Flowering and pod-forming period is the most period of soybean uptake, and the application of flower fertilizer can increase yield by more than 15%. At the initial flowering stage of soybean, the urea is usually 5-10 kg per mu, and the potential difference is suitable for application. The growth is vigorous and flourishing. It should be chased or not chased. It should be applied with nitrogen fertilizer during the flowering period. The foliage should be sprayed with phosphorus and potassium nutrients and micro-fertilizers such as boron and molybdenum. Generally spray 2 times, each time with 100 grams of potassium dihydrogen phosphate, 25 grams of ammonium molybdate, 100 grams of borax (dissolved with a small amount of warm water), together with 50 kilograms of water, spray evenly on the stems and leaves of plants.

(2) Anti-early stains. Soybean flower pods require a large amount of water. It is particularly sensible to moisture, and it is easy to fall into the pod when it is dry. Therefore, in the case of drought, if the leaves are found to have a wilting phenomenon at noon, they should be flooded and drought-resistant in time. However, avoid flooding with large water, otherwise it will easily cause the roots to suffocate and rot, soil compaction, causing cracks when dry, damage the root system, and irrigation with small ditch, so that the soil can be moist. Soybeans have poor stain resistance and are afraid of waterlogging. When there is more rain in the flower pod period, attention should be paid to clearing the ditch in time.

(3) Spraying hormones.

1, paclobutrazol. Control soybean plant height, shorten internode length, increase stem diameter, prevent lodging, increase the number of branches per plant and pods, grain number, increase seed setting rate and grain weight, and promote the formation of top pods, generally increasing yield by more than 12% . Spraying about 7 days after the initial flowering, the growth should be properly applied before the initial flowering. Use 15% paclobutrazol wettable powder 50-100g per acre, add 50 kg of water to dilute and spray the front and back of the leaves evenly. The sprayed infinite pod-type variety can be higher, and the limited pod-type variety should be lower; the field with poor potential should be higher, and the potential difference should be lower.

2. Sodium bisulfite. It is a photorespiration inhibitor that applies or reduces the consumption of nutrients by light respiration on soybeans, improves plant type, promotes the growth of soybean roots and increases the number of rhizobial bacteria. The effect of preserving flowers and pods is good, and the yield is increased by more than 10%. Application method: Spray once in the initial flowering stage and the full flowering stage, each time using 10 g of sodium bisulfite per acre, and after adding 75 kg of water to dilute, choose to spray the leaves when the afternoon sun is not too strong. It is also possible to use photosynthetic micro-fertilizer (100g per acre) and mixed with potassium dihydrogen phosphate.

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