In greenhouse cucumber seedlings, often encounter some abnormal growth of plants, such as light flash seedlings, tall seedlings, rigid seedlings, etc., should be promptly handled and saved, otherwise it will cause serious losses.
First, light flash seedlings
Light flashing seedlings are snoring or suddenly dying after the sudden release of quilts, grasshoppers, and Other external insulation coverings after the sudden chilly sun or snow, and after sudden rain.
The reason is that the transpiration of Lianxue, Xueyutianjing seedlings is weakened, water absorption is insufficient, and the activity and absorption capacity of the root system is weak. When the weather suddenly turns fine, the temperature is easy to rise and the ground temperature rises slowly. This causes an imbalance between the ground and the temperature. In the case of unbalanced ground and temperature, the water evaporated from the stems and leaves cannot be supplemented by the absorption of the roots. There was a snoring or death of a seedling. Rescue method:
1. When the weather is sunny, you should uncover the outer insulation coverings such as grasshoppers and quilts more often than usual. This will allow the seedlings to see more light at a lower temperature and gradually adapt to the light.
2. Spray the seedlings with water or nutrient solution. Its mechanism of action is to increase the moisture in the indoor seedlings and in the air and reduce the temperature of the seedlings, in order to reduce the transpiration of the plants and to supplement part of the nutrition. Spray water can be performed several times depending on the situation.
3. Repeatedly covered with grass cover, quilts and other insulation cover. After the straw and quilts are unveiled, the staff can no longer leave the greenhouse. Observe it at any time. Once it is found that the plant is burping, it is necessary to put down a part of grasshoppers and quilts. After the plants return to normal, the grasshoppers, cotton quilts, etc. will be rolled up. When the wilting of the plants occurs again, the grasshoppers and quilts that have not been laid down before are released immediately. This is repeated until no more wilting occurs after all the grasshoppers and quilts have been lifted.
Second, high foot seedlings
The tall seedlings are only seedlings. For cucumbers, the cause of high seedlings may be due to excessive seedlings, excessive moisture, and excessive night temperatures, the leading cause of which is nighttime temperatures. After emergence of tall feet, you need to find the cause of the appetite, eliminate it, and then remediate it. The remedy is:
1. In addition to dense seedlings, control the water, control the night temperature.
2. Add phosphorus, spray potassium dihydrogen phosphate 300 times.
3. Spray a slightly higher concentration of growth regulators, such as 200 times greener 95, to temporarily suppress growth.
4. Earthing in the roots and maintaining a certain humidity to promote the occurrence of adventitious roots.
Third, the rigid seedling
Stems are short, leaves are small, leaf margins are rolled down, roots are small and small, slow growing seedlings.
The reason for the rigidity of the seedlings is due to lack of water in the fertilizers, the heavy weight of the bed soil, or the organic fertilizer used in the bed soil is not fully decomposed. The remedy is:
1. On the basis of loose soil, irrigate chemicals that promote rooting, supplement water and promote hair rooting.
2. Leaves can be sprayed with natural brassin, plant power 2003 and so on. Together with the promotion, you can resume growth as soon as possible.
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