1. According to cucumber, tomato fertilization at different fertility stages. Cucumber and tomato seedlings must ensure normal absorption of nutrients, fertilizer should be less, the concentration should be low; full fruit fertilizer should be large, the concentration must be larger. Some farmers use 200 kg of diammonium phosphate at a time. It is unscientific to try to obtain high yields by diammonium alone.
2. Fertilize according to soil conditions. If using top dressing with water, the amount of soil used should be based on soil conditions. The soil is dry and the concentration is low. When the soil is moist, the concentration is higher and the amount of fertilizer used is less. Sandy soils have poor water retention and fertility, and they need to be applied in small quantities; viscous soils have strong water retention and fertility, and the frequency of fertilization should be small, but the amount of fertilization should be more.
3. Fertilize according to weather changes. Since the temperature will affect the endurance of the root system to fertilizer concentration, when the temperature is high, the fertilization concentration should be low. Otherwise, burning roots will easily occur. When the temperature is low, the concentration will be larger. Therefore, fertilizer should be applied according to the weather.
4. According to different fertilizer types to take different methods of fertilization. When chasing chemical fertilizers, it is advisable to adopt furrows so as to concentrate the effects of fertilizers and timely cover soil after topdressing to prevent nutrient volatilization and reduce fertilizer efficiency. Topdressing nitrogen fertilizers should be 10 cm away from the rhizomes of the plants to avoid burning roots. Composting with irrigation can increase fertilizer efficiency.
In general, the amount of basal fertilizer for cucumber and tomato is approximately equal. The amount and quantity of fertilizer used for cucumbers and tomatoes in one mu of greenhouse are: 3000 to 4000 kg of decomposed manure or 520 to 640 kg of avermectin organic fertilizer can be used (with chicken manure no longer used for avermectin organic fertilizer, General 40-50 kg avermectin organic fertilizer can replace 500 to 800 kg of chicken manure), 40 kg of diammonium phosphate, 100 kg of pure potassium sulfate, 30 kg of urea, 4 kg of Indian calcium, 3 kg of borax, 1.5 kg of zinc sulfate 40 kg of microbial agents. Sprinkle the above fertilizer deep into the ground. Microbial microbial agents can be applied in the form of ditching and acupuncture, and they can be used centrally during transplanting. Through our experiments in Shouguang and Liaocheng in recent years, formula fertilization can save costs and increase the yield of cucumbers and tomatoes.
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