Reasons for Unfilled Soybean Pods and Control Measures

Soybean is an important grain crop in China, but during cultivation, the phenomenon of unfilled soybean pods often occurs, and this phenomenon seriously affects the yield and quality of soybean. So what are the reasons for unfilled soybean pods? How should they be controlled? Follow the editor to learn about them.

I. Reasons for Unfilled Soybean Pods

1. Insufficient nutrients in the later stage

Soybean consumes a large amount of nutrients after flowering. If fertilizer is not applied in time at this time, it will lead to insufficient nutrients after full bloom, causing yellowing of leaves and short plants, resulting in unfilled pods.

2. Nutrient imbalance

Applying too much nitrogen fertilizer during fertilization causes an imbalance in the carbon-to-nitrogen ratio, which leads to taller plants, longer internodes, excessive lush foliage with delayed maturity, sparse flowers and pods, and the formation of empty pods and half-shriveled pods; moreover, the maturation period of the pods will also be delayed.

3. Long-term drought

When soybean is flowering and encounters long-term drought, it will cause the leaves to wilt and turn yellow and withered, causing the pods to stop growing, and even the whole plant to die. In plots with a shallow tillage layer and insufficient water, unfilled soybean pods are even more serious.

4. Cold damage

For late-sown or late-maturing varieties, in plots still flowering from late September to early October, because autumn temperatures drop, leaf photosynthesis weakens, and young pods also stop developing, resulting in unfilled pods.

5. Diseases and insect pests

Summer and autumn are the peak period for soybean viral diseases. Viral diseases will cause leaves to wrinkle and young pods to become deformed. Damage from the soybean pod borer causes empty and shriveled pods with wormholes.

6. Uncoordinated light and temperature

In low-altitude areas, July-August is under long-day and high-temperature conditions. Long days delay soybean grain development, while high temperatures promote rapid development and aging of pods, resulting in soybean plants with many flowers and pods but no filled seeds.

II. Control Measures

First, according to the climatic characteristics of different regions, select suitable varieties to strive for high yield; then, according to the light and temperature changes in different regions, select adapted varieties. Field management should be strengthened. During drought, water timely and appropriately to meet the water requirements of soybean growth and development. The habit of growing soybean without fertilization should be changed. According to the fertilizer requirements of soybean, scientific formula fertilization should be carried out. If fertilizer deficiency appears in the middle and late stages, foliar fertilizer can be sprayed to supplement nutrients, so as to avoid premature aging due to deficiency. For the control of diseases and insect pests, attention must be paid, and once diseases and insect pests are found, control them promptly to avoid the spread of the disease.

  The above is an introduction to the reasons for unfilled soybean pods and control measures. We hope it can help you. If you want to learn more related knowledge, please follow us.