Do you know what causes the lack of beans in soybean pods?

There are no beans in the soybean pods, because of the problem of seeds, because of the problem of drought, because of the problem of pests and diseases. It also has to do with the soil problem, and it has to do with the high temperature.

Generally speaking, the absence of beans in soybean pods may be a problem with the seeds, or it may be too hot, malnourished, or too dry, and suffering from a series of pests and diseases.

The first may be that the beans are not planted well, and the second is that the soil nutrients are not balanced, the pollen is not fully fertilized, the field management is insufficient, and the water and fertilizer are not enough.

1. The reason why soybeans have pods but no substance.

1. Improper selection of varieties.

Generally speaking, the late-maturing varieties are selected, and the temperature is already low at the soybean drum stage, which seriously affects the grain drum speed, so it induces pods but not substance.

2. * The ratio of soil nutrients is out of balance.

Boron is an important trace element that promotes the formation and growth of soybean pods.

Boron deficiency can induce soybean pods to be indifferent; In addition, excessive nitrogen fertilizer, shade in the field, tall plants, long internodes, excessive vegetative growth, sparse flower pods, the formation of empty pods, semi-deflated pods, and the maturity period is delayed. It is especially severe in years with high rainfall and insufficient sunshine.

3. Poor field management.

Heavy cropping, soil compaction, excessive nitrogen fertilizer, weak grass seedlings, and excessive density will affect the ventilation and light transmission of soybean plants, thereby weakening photosynthesis.

Leads to pods and inauthenticity.

4. Adverse climatic conditions.

For example, there is more rain during the soybean growth period, or long-term drought, serious lack of water, high or low temperature will reduce soybean photosynthesis and respiration.

Increase, less manufacturing substances, more consuming substances, resulting in soybean pods and inauthenticity.

5. Pest and disease hazards.

In summer and autumn, the occurrence of viral diseases in soybean causes the leaves to shrink and the young pods to be deformed, and the soybean heartworm damage causes the insect eyes to be empty and seedless.

Second, soybeans have pods and no precautionary measures.

1. Choose suitable varieties.

According to the local climate characteristics and planting habits, select varieties suitable for local planting, drought and flood resistance, lodging resistance and disease resistance, high-quality medium and early maturity and low maturity for planting.

2. Arrange stubble reasonably to avoid heavy planting.

Reasonable planting structure can effectively reduce the occurrence of pests and diseases, avoid the single consumption of soil nutrients, maintain balance and sustainable use of soil resources. Under this principle, the stubble should be reasonably arranged, the crop rotation system should be adopted, and the stubble should not be replanted as much as possible, so as to reduce the pod and not achieve the occurrence of elephants.

3. Sow seeds at the right time.

Summer soybeans should be sown at the right time, sowing too early will lead to early flowering, and it will also cause old seedlings and crazy seedlings. The suitable sowing date for summer soybeans is generally from June 5 to 15, and if it is a late-maturing variety, it should be sown after June 20.

4. Scientific fertilization to maintain nutritional balance.

Follow the principle of "suitable nitrogen fertilizer, increased organic fertilizer, combined application of phosphorus, potassium fertilizer and micro fertilizer", scientific fertilization, and maintain nutritional balance. If sufficient fertilizer and water cause plant growth, the foliar spray should be applied at the early flowering stage, which can reduce the plant height, prevent the flower pod from falling off, and reduce the empty stubble rate.

In addition, foliar fertilizer can be sprayed skillfully at the flowering and grain bulging stage, which can promote flowering and podding and promote the fullness of grains. Kilograms of urea or potassium dihydrogen phosphate are available.

kg + 100 grams of borax, and then mixed with 60 kg of water for foliar spraying, the yield increase effect is obvious.

5. Reasonable irrigation, timely drought prevention and drainage.

Before soybean sowing, if it is dry and early moisture.

When the time is poor, it should be watered in time to ensure the emergence rate, in the growing period if it is dry early, the soil moisture is insufficient, it should be watered in time to prevent drought, so as to meet the demand for water in soybeans, which can reduce the saffle. In case of long-term.

Soybeans only grow pods but do not produce seeds may be related to high temperatures, excessive nitrogen fertilizer, pests and diseases, drought, improper use of pesticides, etc. Persistent high temperatures can cause soybean pollen grains to dry up, resulting in poor pollination and fertilization. Too much nitrogen fertilizer will cause excess nutrients and affect the reproductive growth of soybeans.

Soybeans are infested with insects, which will empty the pods. Drought during the flowering and podding period is not conducive to soybean flowering and fruiting.

Boron deficiency, bugs, and drought during the flowering period of soybean can cause soybean flowering and unfruiting. Solubor plus bifenthrin plus brassinin can be sprayed to promote flower bud differentiation and increase pod setting rate.

Soybean flowering does not set podding, and the adaptability of soybean varieties should be considered, and the introduction of seeds at different latitudes will cause foreign varieties to be unsuitable for local climatic conditions.

1. Whether the flowering period is high temperature and drought, pollen inactivation or stigma does not adsorb pollen, physiological boron deficiency, affecting fertilization and fruiting.

Soybean is warm-loving, with 15-20 optimal, growth temperature 20-25, flowering and pod-setting temperature 20-28, low temperature delay in pod setting, less than 14 can not flower, too high temperature plants will end growth early. The germination of seeds requires more water, and the soil moisture content is required to be 70%-80% during the flowering period, otherwise the flower bud shedding rate will increase. The fertilizer uptake of soybean before flowering is less than 15% of the total, while the flowering and pod-setting stage accounts for more than 80% of the total fertilizer uptake.

2. Sufficient nitrogen fertilizer, vigorous plant growth, imbalance between vegetative growth and reproductive growth, high density, impermeability, and low fruiting.

Reasonable fertilization: 25 kg of calcium, magnesium and phosphorus fertilizer per mu mixed with 500 kg of soil miscellaneous fertilizer as seed fertilizer; At the early flowering stage, 3-5 kg of urea per mu was applied according to the seedling condition, 40-50 kg per mu of 2% superphosphate clarifier was used at the pod-setting stage, and 30-40 kg per mu of ammonium molybdate concentration diluent was used, and the two were mixed and sprayed on the foliage; Or spray the foliage with a borax solution to improve the fullness of the seeds.

Extended Information Survey Feed:

Soy aphids. Hazard characteristics: Soybean aphids have the habit of becoming tender.

Adults and nymphs suck the sap on the growth point of soybean plants, young leaves and young stems of parietal leaves, and when they are serious, they are covered with stems and leaves, and young English is also harmed, resulting in leaf curling, yellowing, plant dwarfing, root stunting, the number of branches and pods is reduced, the weight of 100 seeds is reduced, the yield is reduced, and even the whole plant dies.

Control methods: Seed treatment, coated with soybean seed coating, can control underground pests and early aphids. Powdering, spraying powder with dimethoate powder or 2% pine borer powder, with a dosage of kilograms per mu.

Spray, spray with 40% dimethoate EC or 50% aphid net EC or 50% phoxanthion EC 1500-2000 times.

<>There are many reasons for the inappropriate ratio of nitrogen, phosphorus and potassium, the difference in variety, excessive density, the lack of trace elements, the damage of diseases and insects, etc., which can cause the seeds to bulge up and form pods. China Agricultural Technology Network recommends that you start from the following aspects to prevent summer soybean pods in production:

1. Increase the application of organic fertilizer and phosphorus and potassium fertilizer and use nitrogen fertilizer, which is prone to crazy growth and cause pods but not substance. After the emergence of summer soybeans, a certain amount of organic fertilizer and ternary compound fertilizer must be applied. Phosphorus and potassium fertilizers should be increased to reduce pods in fields with serious pods.

2. Spraying foliar fertilizer soybean boron deficiency is very easy to cause pods and insubstantiation. In production, borax and urea solution should be sprayed every l0 days after the initial flowering of soybeans, and sprayed 2-3 times in a row. Spraying potassium dihydrogen phosphate at the peak flowering stage can not only prevent plant defertilization, but also prevent pods.

Foliar fertilizer should be sprayed in the afternoon on a windless cloudy or sunny day, mainly on the back of the leaves.

3. Reasonable irrigationIn the soybean flowering pod drum stage, in case of drought and insufficient soil moisture, timely irrigation should be used to prevent drought in order to meet the demand for water and reduce the pod during the soybean pod drum stage.

4. Pay attention to the prevention and control of pests and diseases, and pay attention to the occurrence of aphids from the soybean seedling stage, and the prevention and control should be early. Special attention should be paid to the prevention and control of downy mildew, gray spot, soybean heartworm, bean pod borer and bean moth at the flowering pod stage to improve the pod setting rate.

5. Establish a reasonable soil tillage system for crop rotation and stubble to avoid heavy planting, which can prevent soil nutrient imbalance, reduce the harm of diseases, insects and weeds, and reduce the rate of empty cropping.

The above methods can effectively prevent soybeans from appearing "pods but not fruits", have you learned? Try it!