1. Fertilization problems and fertilization principles
The following fertilization principles were proposed for the problems of light potassium fertilizers with diarrhea and phosphorus in the production of radish, the imbalance of nitrogen, phosphorus and potassium, the unreasonable application period of phosphorus and potassium fertilizers, the obvious shortage of organic fertilizers, and the insufficient attention to the application of trace elements.
(1) Optimize the amount of nitrogen, phosphorus and potassium fertilizers according to soil fertility conditions and target yield, pay special attention to the adjustment of nitrogen and phosphate fertilizers, and increase potassium fertilizer;
(2) Northern calcareous soil has low content of effective trace elements such as manganese, zinc, boron and molybdenum, so attention should be paid to the supplementation of trace elements; when the acidity of vegetable fields in the south is severe, appropriate amount of acidic soil conditioner such as lime should be applied;
(3) Rational application of organic fertilizers significantly increases radish yield and improves quality, avoids use of organic fertilizers that are not fully decomposed, and promotes the use of commodity organic fertilizers and decomposed farmyard manure.
2. Fertilizer amount and method
(1) Organic Fertilizer Amount: Small radish with a yield level of 1000-1500 kg/mu (such as radish of the four seasons) can be applied with organic fertilizer 0.5-1 quarts/acre; yield levels are high in a range of 4500-5000 kg/mu. Fertilizer 2~3 square/mu.
(2) The output level is above 4000 kg/mu: nitrogen fertilizer (N) 15~18 kg/mu, phosphate fertilizer (P2O5) 5~7 kg/mu, potassium fertilizer (K2O) 12~14 kg/mu.
(3) Production levels of 2500-3000 kg/mu: Nitrogen fertilizer (N) 10~13 kg/mu, Phosphorus fertilizer (P2O5) 4~6 kg/mu, Potash fertilizer (K2O) 10~12 kg/mu.
(4) The output level is 1000~1500 kg/mu: nitrogen fertilizer (N) 6~9 kg/mu, phosphate fertilizer (P2O5) 3~5 kg/mu, potassium fertilizer (K2O) 8~10 kg/mu.
If basal fertilizer is not applied with organic fertilizer, nitrogen fertilizer (N) 3~5 kg/mu and potassium fertilizer (K2O) 2~3 kg/mu may be increased as appropriate.
For plots prone to lack of trace elements in boron, or for plots that have exhibited symptoms of boron deficiency in previous years, one kilogram of borax can be applied per acre before sowing, or 0.1% to 0.5% of borax can be used during late growth of radish or The boric acid aqueous solution was sprayed on the leaves (also sprayed with pesticide), sprayed every 5 to 6 days, and sprayed 2 to 3 times.
All organic fertilizers were used as base fertilizer, 40% of the total nitrogen fertilizer was used as base fertilizer, 60% were used as top dressing in rosette stage and 2 times in the early stage of fleshy root growth; Phosphorus and potassium fertilizers were all used as base fertilizer, or 2/3 potash was used as base fertilizer, 1 / 3 in the early stage of growth of fleshy root topdressing.
Conical Funnel Machine ,Handle Funnel Machine,Manual Funnel Machine
Guangzhou New Power Catering Equipment Manufacturing Co.,Ltd , https://www.gznewpower.com