Kidney Bean, also known as Bean, Bean, etc., is very rich in nutrition and is one of the favorite vegetables. Green beans are usually grown in the spring of February-April, and in the autumn of August-September. In the process of planting, it is easy to appear as a long-term phenomenon. If the farmers do not pay attention to the heart, the green beans are prone to less flowering, less pods, and even no flowering and no pods. influences. So what are the reasons for the four seasons, how to prevent and remedy?
1, the symptoms of long bean beans
(1) After the seedlings of the green bean seedlings are unearthed, the hypocotyls grow too long to form high seedlings.
(2) The four season bean plants in the adult stage are long in internodes, the stems are slender, the leaves are yellow, the flowering is less, and the pods are less.
2, the reason for the long bean beans
(1) The temperature in the seedling stage is too high: After the seedlings of the green beans are unearthed, the temple is not cooled down in time to make the seedlings grow into tall seedlings.
(2) Excessive use of nitrogen fertilizer: The nitrogen content of the base fertilizer is too high, or excessive nitrogen fertilizer is used during the seedling stage.
(3) Soil is too wet: Before the plant blooms, the soil contains too much water due to rainfall or watering.
(4) Improper management: Insufficient illumination in the protected area, high humidity, or high temperature (within the protected area), it is easy to cause the plant to grow.
3. Precautions for the four seasons
(1) Cooling and dehumidifying to increase light
After the seedlings are unearthed, the temperature is lowered and the humidity is increased to increase the light, so as to prevent the seedlings from growing into tall seedlings.
(2) Seedling seedlings and control the amount of nitrogen fertilizer
When the third true bean seedling appears, or 3-4 days after the seedling is planted, the first topdressing and watering can be added with 2.5 kg of potassium sulfate and 2.5 kg of superphosphate. It should be cultivated and weeded and soiled 2- 3 times (once every 10 days or so), control water seedlings. Generally, no watering is required during the seedling stage. If the soil is dry, water should be poured to avoid excessive control of the seedlings and affect normal growth.
(3) Insert or hang the vines in the vines, and then insert the vines in time.
(4) Water and fertilizer management during pod formation
When the tender pods on the first inflorescence are 3-5 cm long, they are topdressed and watered, applying 50% of human and animal excreta 2-500-5000 kg per mu, or 15-20 kg of ammonium sulfate, or 10 kg of urea, or Potassium sulfate 10-15 kg, less fertilization before flowering, appropriate amount after flowering, re-application in pod-forming period, topdressing 1-3 times. At the peak of the pod, the solution can be sprayed with 0.01%-0.03% ammonium molybdate solution. After each harvest, watering once every time, watering a small amount of times, keeping the soil dry and wet (the soil water holding capacity is 60%-70%), mastering the principle of “dry flower wet podsâ€.
(5) Strengthening the management of protected areas
In the winter, spring, early spring, early spring and other cultivation of the protected area, take measures such as releasing wind and shading to prevent the temperature from being too high. In the early stage of growth, 19-23 degrees during the day (14-16 degrees on cloudy days), 13-15 degrees during the night; the flowering results are 20-25 degrees during the day, 15-18 degrees during the night, and the lowest is not less than 13 degrees. During the return period (when the pods on the main vines are finished quickly and the lower part of the main stem is sprouted), the temperature can be lowered by 1-2 degrees.
(6) picking tender pods at the right time
Seedlings can be picked 10-15 days after flowering.
4, the remedies for the four seasons
(1) Timely topping at the height of about 80 cm when the plant height is topped (fingertips), so that the stems are thick and strong, and the side branches are promoted.
(2) Spraying liquid control at a plant height of 30 cm, 50 cm, and 70 cm, respectively, a spray concentration of 100 mg/kg of mepazine and 0.2% potassium dichlorophosphate mixed solution, 200 mg/kg of A A mixed solution of piperazine and 0.2% urea, or a mixed solution of 200 mg/kg of mepivazone and 0.2% potassium dihydrogen phosphate.
The above are the reasons for the long bean and the preventive and remedial measures. Pay attention to the above points, effectively avoid the phenomenon of the emergence of green beans, increase the yield and quality of green beans, and increase economic returns.
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