Root dressing, also known as spraying foliar fertilizer, is a fertilizing method in which the fertilizer is made into a solution with a certain concentration and sprayed on the leaf surface to absorb nutrients from the leaves. Appropriate amount of extra-root fertilizer can improve the yield and quality of winter vegetables.
In the process of vegetable growth, the leaves have the same ability to absorb nutrients as the root system, especially in the late growth stage. Under adverse conditions such as soil compaction, the ability of roots to absorb nutrients is weakened, and extra-root dressing can effectively make up for root absorption. The lack of nutrients.
For different winter vegetables, we should apply different fertilizers outside the roots in different periods. In potato production, when the tubers start to expand, they should spray 1.0-3.0% of superphosphate or 2.0-3.0% of potassium sulfate in order to promote the accumulation of starch in the tuber; 0.2% borax can increase seed yield; broccoli and broccoli spray 0.05~0.2% borax during the formation of flower bulbs can reduce the phenomenon of flower ball becoming black and flower ball twisting; leafy vegetables are sprayed at the late growth stage. 1% urea or 1.0 ~ 3.0% of superphosphate can promote darker leaf color, thicker leaves; solanaceous vegetable melon vegetables in the young fruit period for extra-root fertilizer, can promote fruit enlargement. At the same time, applying foliar fertilizers such as phosphorus, potash fertilizer or Yunda 120 to winter vegetables can have a certain degree of cold-resistance; in addition, some typical symptoms of vegetables lacking certain elements can be targeted to microclimate. Fertilizer supplements the trace elements that are lacking in plants.
The method of dressing fertilizer outside the roots is that the general fertilizer can be directly dissolved and sprayed, and the phosphate fertilizer must be dissolved in fresh water and left overnight, and then diluted with fresh water and sprayed. The spraying time is usually in the morning and evening, and the spraying effect is better when there is dew on the sunny morning. Generally, it sprays once every 7~10 days, and sprays 3~4 times continuously. Top dressing can only be used as a supplemental fertilizer measure. Most of the nutrients should also be absorbed by the root system, so it cannot replace the conventional root dressing.
In the process of vegetable growth, the leaves have the same ability to absorb nutrients as the root system, especially in the late growth stage. Under adverse conditions such as soil compaction, the ability of roots to absorb nutrients is weakened, and extra-root dressing can effectively make up for root absorption. The lack of nutrients.
For different winter vegetables, we should apply different fertilizers outside the roots in different periods. In potato production, when the tubers start to expand, they should spray 1.0-3.0% of superphosphate or 2.0-3.0% of potassium sulfate in order to promote the accumulation of starch in the tuber; 0.2% borax can increase seed yield; broccoli and broccoli spray 0.05~0.2% borax during the formation of flower bulbs can reduce the phenomenon of flower ball becoming black and flower ball twisting; leafy vegetables are sprayed at the late growth stage. 1% urea or 1.0 ~ 3.0% of superphosphate can promote darker leaf color, thicker leaves; solanaceous vegetable melon vegetables in the young fruit period for extra-root fertilizer, can promote fruit enlargement. At the same time, applying foliar fertilizers such as phosphorus, potash fertilizer or Yunda 120 to winter vegetables can have a certain degree of cold-resistance; in addition, some typical symptoms of vegetables lacking certain elements can be targeted to microclimate. Fertilizer supplements the trace elements that are lacking in plants.
The method of dressing fertilizer outside the roots is that the general fertilizer can be directly dissolved and sprayed, and the phosphate fertilizer must be dissolved in fresh water and left overnight, and then diluted with fresh water and sprayed. The spraying time is usually in the morning and evening, and the spraying effect is better when there is dew on the sunny morning. Generally, it sprays once every 7~10 days, and sprays 3~4 times continuously. Top dressing can only be used as a supplemental fertilizer measure. Most of the nutrients should also be absorbed by the root system, so it cannot replace the conventional root dressing.
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