Fertilization principle
In view of the diazo phosphate fertilizer light potassium fertilizer, NPK ratio, the irrational application period of phosphorus and potassium fertilizer, the insufficient application of organic fertilizer, and the insufficient attention paid to the application of trace elements, the following fertilization principles are proposed:
(1) According to the soil fertility conditions and target yield, optimize the amount of NPK fertilizer, pay special attention to moderately reduce the amount of nitrogen and phosphorus fertilizer, and increase the application of potassium fertilizer;
(2) The content of trace elements such as manganese, zinc, boron and molybdenum in the northern calcareous soil is low, and the supplement of trace elements should be paid attention to; when the acidification of vegetables in the south is serious, the acid soil conditioner such as lime should be applied in an appropriate amount;
(3) Reasonable application of organic fertilizers significantly increases radish yield and quality, avoids the use of organic fertilizers that are not fully decomposed, and promotes the application of commercial organic fertilizers and decomposed farmyard manure.
2. Fertilization advice
(1) The amount of organic fertilizer applied, small radish (such as four season radish) with a production level of 1000~1500 kg/mu can be applied 0.5~1 square/mu of organic fertilizer; the high level of production with the output level of 4500~5000 kg/mu is organic. Fertilizer 3~4 squares/mu;
(2) The production level is above 4000 kg/mu, nitrogen fertilizer (N) 10~12 kg/mu, phosphate fertilizer (P2O5) 4~6 kg/mu, potash fertilizer (K2O) 13~15 kg/mu;
(3) The production level is 2500~4000 kg/mu, the nitrogen fertilizer (N) is 6~10 kg/mu, the phosphate fertilizer (P2O5) is 3~5 kg/mu, and the potassium fertilizer (K2O) is 8~13 kg/mu;
(4) The production level is 1000~2500 kg/mu, nitrogen fertilizer (N) 4~6 kg/mu, phosphate fertilizer (P2O5) 2~4 kg/mu, potassium fertilizer (K2O) 5~8 kg/mu.
For plots that are prone to trace element boron deficiency, or for plots with boron deficiency symptoms in previous years, 1 kg of borax per acre may be applied before sowing, or 0.1% to 0.5% of borax may be used in the middle and late stages of radish growth. The boric acid aqueous solution is sprayed on the foliar surface (may also be sprayed with pesticides), sprayed once every 5 to 6 days, and sprayed 2 to 3 times.
All organic fertilizers were applied as base fertilizer. 40% of total nitrogen fertilizer was used as base fertilizer, 60% was applied in topdressing in rosette stage and fleshy roots. The phosphorus fertilizer was applied as base fertilizer, and potassium fertilizer was mainly applied. More than 60% of the meat is mainly applied in the early stage of growth and expansion of fleshy roots.
This article URL: 2016/2017 autumn and winter radish scientific fertilization guidance advice radish fertilization skills
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