There are roughly three causes of cucumber bitterness: 1. Heredity of herds; 2. Mutation of environmental conditions; 3. Uncontrolled cultivation and management. Specific prevention methods are:
1. Select good varieties Try to avoid the use of dark green varieties, because dark green leaves of cucumber, its high content of bitter, should choose the lighter color of the leaf.
2. Control of optimum temperature When the ground temperature in the greenhouse is lower than 13°C for a long time, the roots are stunted, the absorption capacity of the fertilizer and water is weakened, the melon strip growth is delayed, and the accumulation of bittersin is increased. The appropriate temperature should be controlled at about 22°C.
3. Less nitrogenous nitrogen fertilizer promotes dark green color and should be applied less. Can be cooked more organic fertilizer and phosphorus and potassium fertilizers. Do not mix chicken manure when applying manure, because of the high nitrogen content of chicken manure, easy to make cucumber taste bitter.
4. Irrigation of magnetic water According to tests, a magnetizer is installed at the outlet of the pump to magnetize the irrigation water. The cucumber watered by the magnetized water has good growth and strong disease resistance, which can prevent bitterness from accumulating in the melon strips.
5. When the fumigation tobacco seedlings in the shed contain 2 to 3 true leaves, light smoke (burning of straw, straw, etc.) is placed in the shed, and 2 to 3 days of closed airtight time can increase the number of female flowers and increase the intensity of bitter element accumulation.
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