At present, the overwintering vegetables are in the vigorous growth period, while the winter temperature is low, the light is weak, and the vegetables grow slowly. Many vegetables in a large number of fruiting period need a large amount of fertilizer, which requires vegetable farmers to apply fertilizer in time. However, many vegetable farmers still apply fertilizer according to other seasons when applying fertilizer, and do not pay attention to methods. As a result, the effect after application is not good, even the roots are injured, resulting in poor plant growth. So, what are the changes in the winter fertilization method?

First of all, it should be noted that nutrition is applied alternately with root raising.

The ground temperature is low in winter, and it is best for vegetable farmers to choose high-end water-soluble fertilizer and functional fertilizer with high absorption and utilization and little influence on ground temperature when topdressing.

High-end water-soluble fertilizerNutrients are comprehensive. In addition to meeting the needs of vegetable growth and development, the utilization rate is generally as high as 80%, and some are as high as 90%, and the advanced production technology is less. When the temperature is low, the amount of water-soluble fertilizer should be appropriately reduced, and microbial fertilizer or humic acid fertilizer should be applied, such as the mother fungus of an acre of God and potassium humate from mineral source, so as to promote rooting, raise roots and protect roots, and improve soil temperature.

functional fertilizerIt can stimulate the rooting of vegetables, improve the resistance of plants, and the effect of raising roots is outstanding, but the content of nitrogen, phosphorus and potassium contained in it is low. Simple application of functional fertilizers is easy to cause the vegetable to be fertilized during the fruiting period, which has a great impact on the yield. It is not recommended to apply separately.

Therefore, in winter, all water-soluble fertilizers should be collocated with functional fertilizers and applied alternately, so that fertilizer can not only ensure the nutrient requirements during plant growth, but also achieve the purpose of raising and protecting roots. Such as an acre of raw seaweed chitin, ujin algae and so on.

Secondly, we should pay attention to the combination of flushing and spraying

In winter, the root activity of vegetables is poor, the ability to absorb water and fertilizer decreases, and blindly flushing fertilizer is not conducive to the absorption of vegetables, but also virtually increases the cost. With the saying that "roots depend on leaves", through foliar spraying fertilizer, nutrients can be quickly absorbed by leaves, especially when there are more cloudy days and it is not convenient to flush fertilizer, foliar spraying fertilizer can supplement nutrients for fruits in time and promote fruit growth.

The leaf is a "green factory", and more than 90% of the dry matter of vegetable production comes from the leaf. If the leaves produce too little nutrition, not only the stem and fruit growth retardation, the root system will also be aging, the ability to absorb water and fertilizer, synthesis of endogenous hormones will also decline. Leaf is the most commonspraying foliar fertilizerIn general, amino acid leaf fertilizer and nitrogen, phosphorus and potassium leaf fertilizer can be sprayed on the leaves. If yellowing and rigidity are serious, chitin and cytokinin should be combined to delay leaf senescence and promote leaf return to normal. Such as one mu of sugar alcohol calcium magnesium zinc, early satiety and so on.

Leaf protection, that is, to protect the leaf function, to ensure the leaf area, mainly including pruning leaves and prevention and treatment of diseases and insects. Regarding pruning and leaf picking, it should be carried out in stages, not too hard at one time. Only pick aged leaves, yellow leaves, pest leaves, etc.I would like to remind you that it is not advisable to remove the lower old leaves rashly, because most of the nutrients needed for root growth are supplied by the middle and lower leaves, which is why some leaves are retained under the bottom fruit.

Therefore, the combination of flushing and spraying, water-soluble fertilizer and foliar fertilizer can foster strengths and avoid weaknesses, which is more conducive to improving plant growth and delaying leaf senescence.

Finally, it should be noted that the key application of medium and trace elements

During the growth of vegetables, although the amount of micronutrient fertilizers is not large, they are indispensable:

For example, iron and manganese play a particularly important role in the photosynthesis of plants, especially in winter when the light is weak and the leaves cannot carry out photosynthesis well. Timely supplement of foliar fertilizer containing iron and manganese can promote the photosynthesis of plants and prevent the emergence of yellowing symptoms of leaves. Boron is very necessary for plant pollination, fruit setting and seed development. Supplementing boron-containing fertilizer can promote flower bud differentiation of plants, prevent the phenomenon of flowers but not real.Such as an acre of God's calcium boron manganese zinc iron, polymeric calcium boron, etc.