Winter rapeseed area in the Yangtze River Basin
Fertilization principle
(1) Scientifically fertilize according to the classification of soil nutrient status, current seedling condition and target yield level in the planting area.
(2) According to the soil effective boron condition, supplement the boron fertilizer, pay attention to the use of qualified boron fertilizer.
(3) In the plots where the amount of base fertilizer is insufficient and the fertilizer is not topdressed in winter, the fertilizer is added early, and the nitrogen fertilizer is the main one, and the water-soluble compound fertilizer can be appropriately applied.
(4) For the plots where the amount of phosphorus and potassium is insufficient, spray potassium dihydrogen phosphate at the pod-forming stage.
(5) Pay attention to clearing the ditch against spring stains. 2. Fertilization advice
(1) The production level is below 100 kg/mu: timely application of manure, nitrogen fertilizer (N) 2 kg/mu, potassium fertilizer (K2O) 1 kg/mu. The base fertilizer has no field for applying boron fertilizer. In the early stage of convulsion to flowering, the surface of the leaf is sprayed with borax 0.2 kg/mu. Fertilizer should be applied in winter and should not be applied according to the weather conditions. The amount of fertilizer should be increased by 30%~50% according to the situation.
(2) The production level is 100~150 kg/mu: timely application of manure, nitrogen fertilizer (N) 2.5 kg/mu, potassium fertilizer (K2O) 1.5 kg/mu. The base fertilizer has no field for applying boron fertilizer. In the early stage of convulsion to flowering, the surface of the leaf is sprayed with borax 0.2 kg/mu. Fertilizer should be applied in winter and should not be applied according to the weather conditions. The amount of fertilizer should be increased by 30%~50% according to the situation.
(3) The production level is 150~200 kg/mu: timely application of manure, nitrogen fertilizer (N) 3.0 kg/mu, potassium fertilizer (K2O) 2.0 kg/mu. The base fertilizer has no field for applying boron fertilizer. In the early stage of convulsion to flowering, the lob sand is sprayed with 0.3 kg/mu. Fertilizer should be applied in winter and should not be applied according to the weather conditions. The amount of fertilizer should be increased by 30%~50% according to the situation.
(4) The production level is above 200 kg/mu: timely application of manure, nitrogen fertilizer (N) 3.5 kg/mu, potassium fertilizer (K2O) 3 kg/mu. The base fertilizer has no field for applying boron fertilizer. In the early stage of convulsion to flowering, the lob sand is sprayed with 0.3 kg/mu. Fertilizer should be applied in winter and should not be applied according to the weather conditions. The amount of fertilizer should be increased by 30%~50% according to the situation.
This article URL: Guiding Opinions on Scientific Fertilization Technology in the Winter Rape Region of the Yangtze River Basin in Spring of 2015
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