**I. Causes of Less Scarring and Fewer Kernels**
1. **Low Temperatures**
Soybeans thrive best in temperatures between 15°C and 25°C, with an ideal range for flower bud differentiation around 20°C. If temperatures drop below 15°C after this stage, growth is stunted, which negatively affects pollination and seed development. The optimal temperature for flowering is 24°C to 29°C, with night temperatures ideally between 18°C and 24°C. Nighttime temperatures below 15°C can prevent flowering even if daytime temperatures are high. Spring weather is often unpredictable, so protective measures should be taken during this period. If low temperatures affect the flower buds or flowers, it can lead to fewer pods and smaller kernels.
2. **Nutrient Deficiency**
Rhizobium bacteria help fix atmospheric nitrogen, enriching the soil. However, early-maturing soybeans grown in cold spring conditions may struggle to establish rhizobia, leading to nitrogen deficiency. This can result in weak plant growth and poor pod development. Soybeans also require significant phosphorus, especially during the branching and flowering stages. A lack of phosphorus at these times reduces the number of nodes, branches, and flowers, and can cause calyx drop. Additionally, phosphorus-deficient plants have fewer root nodules, reducing their ability to fix nitrogen.
3. **Dry Soil Conditions**
The flowering and pod-filling stages are critical for water needs, with soil moisture ideally maintained at 60-70% of field capacity. Dry conditions during this time can hinder carbon dioxide absorption, disrupting photosynthesis. Drought during early flowering can reduce vegetative growth and pod numbers, while drought during grain filling can block nutrient transport, leading to pod and kernel drop.
**II. Preventive Measures**
1. **Protected Cultivation**
To combat low temperatures, early-maturing soybeans can be planted under double-layer protection, such as greenhouses or small arch shelters. Soil temperatures should remain above 12°C from mid-February to early March. Throughout the growing season, the cover should be removed and ventilated according to the temperature needs of each growth stage.
Proper planting density is essential for maximizing yield. Aim for about 20,000 plants per acre, with a spacing of 22 cm by 22 cm.
2. **Fertilizer Application**
A balanced approach of base fertilizer and top-dressing is recommended. Depending on soil fertility, apply 1,000–1,500 kg of compost, 30 kg of high-quality compound fertilizer, and 100–150 kg of wood ash per mu. During the growing season, monitor plant health and apply additional nutrients as needed. At the seedling stage, use 10% decomposed human manure, and before flowering, apply 10–20% decomposed manure or 0.3–0.5% urea. At the early flowering stage, spray a 0.02–0.05% ammonium molybdate solution and apply 25 kg per acre.
3. **Appropriate Irrigation**
During dry periods, follow the principle of "frequent and light watering." Typically, water the crop 2–3 times during the growing season to maintain adequate moisture levels and support healthy growth and development.
1. One time forming ,anti-impact, cold resistance, lasting,durable
2. There is stable material rubber on the bottom of the board to prevent water penetration. Absorb contact surface, the higher the water pressure, more stable it is.
3. The easy and quick installation can save more cost.
4. With the water inside, the anti-impact ability is better,without the water,it can be moved easily.
5. High flexibility high strength plastic Road safety Traffic barrier, can surrounded to a circle to protect road side, flower nursery and the ecological environment.
Traffic Safety Barrier,Flood Protection Equipment,Temporary traffic flood barrier
Denilco Environmental technology(Suzhou)Co., Ltd. , https://www.wflood.com