First, disaster relief
(I) Impact of disasters
Excessive rainfall in summer and autumn causes stagnant water in the fields, which will cause damage to asparagus, resulting in poor ventilation of the soil, severely affecting the respiration of the roots and causing root rot. At the same time, the absorption function of the roots is reduced, and the temperature above the ground is too high and the amount of evaporation is too large. As a result, physiological water shortage occurs in the above-ground stems of the asparagus, resulting in the withering and yellowing of the stems on the ground, and the physiological function is degraded, resulting in the serious occurrence of stem blight, resulting in Asparagus death or severe reduction in the coming year.
(b) Preventive measures
1. The asparagus is planted in sandy loam soil with high topography, drought, and energy. This kind of land has good air permeability and no water accumulation.
2. We will improve the water conservancy facilities for asparagus fields and build a field drainage ditch. In case of rain, we can promptly drain the field water out of the field to ensure smooth water drainage and no water accumulation in the field.
(c) Post-disaster remedial measures
1. When there is a lot of rain, timely rip up soil and increase soil permeability
2. Strictly control diseases, fight fungicide in time, reduce stem blight and root rot. The specific approach is: spray the fungicide once every 7 days, and spray it in time after the rain. Spray the spray on the stem of the ground. Can be used 50% double Ji Sheng 400 times liquid + 80% will be profit 500 times or 50% double Ji Sheng + 70% mancozin 300 times spray.
3. Use more potassium fertilizer to enhance the disease resistance of asparagus.
Second, the drought
(I) Impact of disasters
Due to the undeveloped root absorption of asparagus and its weak water absorption capacity, it is easy to reduce the production of asparagus when it encounters drought. In particular, the dry harvest period, drought stem thinning and difficult to extract, resulting in an increase in hollow bamboo shoots, abnormal bamboo shoots, high head rate , easy to aging, seriously affecting the yield and quality.
(b) Preventive measures
When the soil moisture content is less than 16%, it should be watered in time. In order to prevent spring drought, in order to prevent spring drought, after entering the winter, when the above-ground stems of the asparagus have died and the growth and development of the shoots have basically stopped, sufficient water is poured to solve the spring drought problem.
(c) Post-disaster remedial measures
In the stem and leaf growth period, especially when the assimilation product accumulates at the peak of drought, when photosynthesis cannot be carried out, it should be watered in time.
Third, the disaster
(I) Impact of disasters
The stems of asparagus on the ground are relatively high, reaching more than 1.5 meters. It is easy to fall down in windy weather and affect the growth.
(b) Preventive measures
1. Each row of two hit a 1.5 meters high stakes, pull two fiber ropes, rope height 70 to 80 centimeters, the mother stem in between the two ropes to prevent the mother stem lodging.
2. Choose to stay strong stalks. When the bulb plate expands, there will be multiple new growth points, and a strong stem with a diameter of 1 cm or more and a height of 1.4-1.6 m should be selected.
(c) Post-disaster remedial measures
Clean up the fallen plants and cultivate the ridges.
IV. Disaster Relief
(I) Impact of disasters
After the asparagus has suffered a locust plague, it is easy to cause a large number of wounds, the resistance is reduced, and it is easily invaded by germs.
(b) Preventive measures
The prevention of locust plague should be strengthened and active preventive measures should be taken.
(c) Post-disaster remedial measures
It should be sprayed in time to prevent and control the occurrence of diseases. It can be used 600 times liquid manganese-zinc-manganese or carbendazim 500 times, spray once every 7 days, continuous spray 3 times.
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