Measures of increasing temperature, increasing light, decreasing humidity and foliar topdressing to improve fruit setting rate of eggplant

eggplant topdressing

Temperature and heat preservation, scientific shed construction. Eggplant planting, the use of excellent shed type, lighting angle, greenhouse efficiency, wall thickness, straw curtain thickness, etc., should meet the standards. Hanging two curtains in the shed can increase the temperature by about 3℃. After covering the straw curtain in the evening, add a layer of plastic film to prevent cold, which can increase the temperature of the shed by 3 - 4℃. In addition, apply more organic fertilizer, because the organic fertilizer gap is large and many, which is full of air, which can effectively reduce the heat loss of the soil. Organic fertilizer in the decomposition process can also release a certain amount of heat, can improve the greenhouse temperature and air temperature.

Increase light intensity. Keep the film clean and clean it frequently. Snow day, timely clearing snow, increase the transparency of the shed film. Secondly, reflective film is set up in the shed, and aluminized film reflective curtain (3 meters long and 2 meters wide) is hung on the north wall of the shed to make it vertical to the ground, which can make the ground brighten by about 40%. In the selection of shed film, to choose no drip film, can enhance the intensity of light and improve the shed temperature. In addition, removing the old leaves from the lower part of the eggplant can increase the transparency.

Cultivate healthy plants, promote weak control prosperous. Strengthen fertilizer and water management for weak seedlings. Organic fertilizer and available phosphorus should be used mainly in the early stage, and available nitrogen fertilizer should be used in the middle and late stage. It is best to apply 500-600 kg decomposed thin manure or 20-30 kg cake fertilizer per mu and add 15-20 kg ordinary calcium superphosphate when the eggplant blooms. After entering the full fruiting stage, the available nitrogen was changed to be the main one, and 3-5 times were followed up in the fruiting stage. At the same time, watering is combined with topdressing. For over-vigorous seedlings, the stems of eggplant will be pinched at flowering stage to promote the accumulation of photosynthetic products and promote fruit setting.

Picked at the right time. The fruit-setting rate of eggplant increases with the branching of plants, generally one fruit per branching, so after planting, it should be picked in time to promote its rapid branching, increase the fruiting position and improve the fruit-setting rate.

Correct use of hormones. 20ppm anti-dropping agent or 30~40ppm 2,4-d anti-dropping agent can prevent flower and fruit dropping and improve fruit setting rate.

Foliar topdressing. Low temperature and weak light in winter, slow transformation of organic matter and trace elements in soil, unable to meet the growth needs of eggplant, foliar fertilizer should be supplemented in time to make nutrition sufficient, promote flower bud differentiation, protect flowers and fruits. Baolifeng 150 times solution, borax or boric acid 2000 times solution, magnesium sulfate 1000 times solution, zinc sulfate 1000 times solution, rare earth 600 times solution and other foliar fertilizers can be sprayed.

Do a good job of artificial pollination. The eggplant planted in the protected land should be artificially pollinated, and the pollination time should be 8-10 o 'clock in the morning.

Timely pest control. Grey mold was the main disease affecting the fruit-setting rate of eggplant. Agricultural control and chemical control can be adopted to control gray mold. Agricultural control: (1) control watering, reduce greenhouse humidity, watering should be carried out in the morning, strictly prevent excessive. At the early stage of the disease, proper control of watering, watering, timely ventilation and moisture discharge. (2) Remove the petals, do not leave the petals roots, otherwise it is easy to cause gray mold. (3) Remove diseased leaves and fruits in time. Chemical control: (1) smoking, can choose 10% speed light Ling smoke agent, each time 250 grams per mu. (2) Powder spraying, with 5% chlorothalonil dust or 6.5% Wanmeiling powder, 1 kg per mu each time, spray once every 7 days. (3) Spray, in the early stage of the disease, spray 40% Shile suspension 1200 times, or Nongliling wettable powder 1000 times, spray once every 7 days, spray 2-3 times continuously.