If the management of the greenhouse vegetable is not properly managed during the middle and late stages of growth, premature aging often occurs, resulting in a decrease in yield and quality. Therefore, greenhouse vegetables should be prepared to prevent premature aging.
First, rotation
Implement rotation for more than three years to strive for change and maintain the stability of the soil structure.
Second, balanced fertilization
Fertilization must be rationally used according to the fertilizer requirements of each vegetable, so as to avoid excessive vegetable root damage caused by excessive fertilizer application, thus leading to premature aging. Applying compound fertilizer 15-20 kilograms with 30-40 kilograms of biological fertilizer per acre is appropriate. At the same time pay attention to the use of foliar fertilizer.
Third, watering should be appropriate
Watering should be selected in the morning in fine weather, ensure that there is 2-3 days of sunny days after watering, warming and then ventilation after watering, to avoid premature aging caused by excessively low temperature. In addition, there is also attention that the amount of water should not be too large to prevent rooting.
Fourth, keep enough leaves
Some vegetable farmers are not correct in the late growth period of cucumbers, in order to save time, the leaves have been removed, and the vines have fallen too far. The number of leaves on the plants is too small, and the photosynthetic products produced are reduced, often resulting in deformed and weak fruits. It is recommended that at least 12 functional leaves be kept on each cucumber and the number of retained fruits should be controlled.
Fifth, reasonable temperature and humidity control
In the late growth period of vegetables, it is necessary to pay attention to control of air humidity so as to avoid the occurrence of a large number of diseases, and it is also conducive to early fruit ripening. For sheds that are severely affected by cold, young fruit should be removed in time to ensure the nutrients needed for plant growth and to prevent premature aging due to low temperature and low light.
Six, the rational use of plant growth regulators
In order to spend time, it is generally appropriate to decorate or apply pedicels when flowers are half open or fully open. It is strictly forbidden to repeat flowering; note that the use of anti-dropping agents, tomato pods, or spray flowers must not be sprayed on the leaves of the vegetables.
Seven, pest control should be timely
Early spraying to prevent pests and diseases, but we must pay attention to spraying must be scientific and reasonable, should not spray too frequently, the concentration is too high, so as not to cause injury, increase premature aging of vegetables.