In general, the fertiliser product fertility period is as follows (for reference only): ammonium bicarbonate will be effective on the same day, and the fertilization period will be 15 days; ammonium chloride will be effective in 3 days, the fertilization period will be 25 days, and the fertilizer will be deferred in the later stage; urea will be effective in 7 days, and the fertilizer efficiency will be 45 Days; compound fertilizer for 10 days effective, fertilizer effect period of 90 days; bio-fertilizer is generally effective for about 1 month, the effect of the crop in the long growth cycle is not yet obvious, but the effect of fertilizer can be sustainable for 6 to 8 months.
Many unscrupulous manufacturers in order to meet the "quick results" mentality of farmers' friends, excessively add hormone substances in fertilization and reduce the content of nutrients such as nitrogen, phosphorus and potassium, and put the cart before the horse. The surface effect of this hormone fertilizer is very obvious within a short period of 1 to 2 days after flushing. For example, the leaves and stems grow rapidly, the fruit enlarges quickly, and the results are many. The vegetable farmers believe that this is a “good fertilizer†effect. However, few farmers have noticed that such fertilizers, after application, often cause problems such as prolonged crops, poor flower bud differentiation and premature aging, which in turn reduces overall yields.
The growth of crops is regular, with roots deep enough for leafy growth, early rooting, long stems in the middle, and later fruiting. If the fertilizer is unreasonable, the stems and leaves are prosperous in the long root system, and the roots are weak, so the stems and leaves are thriving again. Just an appearance, the result will only lead to premature death of crops. In short, when selecting fertilizers, it is not possible to judge the quality of a single product by its growth. It is necessary to understand that the ultimate goal is production and quality. Fertilizers that can increase production and ensure quality are good fertilizers.
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