1, lotus root fertilizer application, sulfur-based and chlorine-based can be used?
A: From the perspective of potassium nutrition, both sulfur-based compound fertilizers and chlorine-based compound fertilizers can be used for lotus roots. However, lotus roots are often in a flooded state. Sulfur-based compound fertilizers produce hydrogen sulfide under reducing conditions and have a detrimental effect on the root system.
2, cotton base fertilizer with potassium sulfate compound fertilizer is not necessary? Is urea applied to the ground and other rains?
A: Cotton is a crop with strong chlorine resistance. Therefore, potassium chloride-based compound fertilizers can be used instead of potassium sulfate-based compound fertilizers because potassium sulfate is more expensive than potassium chloride. After urea is applied to the surface, if it does not rain, the urea will also cause ammonia volatilization after dissolution, which will reduce the fertilizer efficiency.
3. When applying cotton basal fertilizer, can rapeseed cake be mixed with urea?
Answer: After fermentation, rapeseed cake is a high-quality organic fertilizer with high nitrogen content and many nutrient types. Urea is a neutral nitrogen fertilizer with 46% nitrogen. The two can be mixed and applied without negative impact.
4, 19-19-19 content of fertilizer, packaging bags marked for the northern region, and a one-time application. Is it possible to use it?
Answer: In principle, compound fertilizer with 19-19-19 content, if the urea in the fertilizer is controlled release urea instead of ordinary urea, this compound fertilizer can be used as a base fertilizer without a top dressing, otherwise there will be problems with one-time application.
5, longan, lychee can be used in chemical fertilizer dissolved in water?
A: Fertilization is a fully water-soluble, high-nitrogen, high-potassium fertilizer that is specifically designed for vegetable applications. Normal Sinofert is not necessarily fully soluble in water, so it is not suitable for flushing.