Early nutrition, root regeneration
When the vegetables are left for a long time, the fruit grows and consumes a large amount of nutrients, and the nutrients distributed by the roots and growth points become less. In this case, the vegetable farmers should adjust their management strategies to lay a solid foundation for promoting vegetable root regeneration.
The first is to raise the warmth and shallowness. The ground temperature is the basis for determining the activity of the root system. In winter, the ground temperature is low for a long time, and the root activity is poor. After the spring, the illumination time is prolonged, and the vegetable farmers should pay attention to properly increase the temperature of the shed, properly water the water, promote the elevation of the ground temperature, and promote the regeneration of the root system. In addition, soil permeability is also an important factor affecting root growth. After harvesting a large number of fruits, before a large number of new roots are regenerated, the mulch film can be uncovered, and the ground surface can be used to draw the ground surface with hooks, or fertilize soybean meal and other organic fertilizers. Breaking the surface knot and increasing the oxygen content of the soil will help to increase root activity.
The second is to adjust the topdressing and promote the roots. Vegetable results In the high season, vegetable farmers generally apply high potassium fertilizer, which makes the potassium fertilizer in the soil accumulate continuously, the content exceeds the standard, and the roots absorb water and nutrients more difficult. The nitrogen fertilizer in the soil is easy to be lost or decomposed with water, especially in the soil with low soil organic matter content, the nitrogen loss rate is faster, so the soil in the early spring is generally low in nitrogen and low in potassium. Affected by factors such as moisture and fertilizer ion movement and transformation, there is a certain interval between the application of fertilizer into the soil and the large-scale absorption and utilization of vegetables, usually in 3-7 days. For example, the amide nitrogen fertilizer (urea) needs to be converted into ammonium nitrogen fertilizer and then converted into nitrate nitrogen fertilizer, so that it can be absorbed and utilized by the root system. Therefore, during the fruit expansion period, the vegetable farmers should supplement the high-nitrogen fertilizers early, adjust the proportion of nutrients in the soil, promote the growth of the stems and leaves of the plants, and quickly restore robustness.
In addition to ordinary water-soluble fertilizers, vegetable farmers should also supplement calcium and magnesium and other trace element fertilizers to regulate nutrient balance and ensure the robust growth of plants. Calcium fertilizer can promote cell differentiation, improve cell function and improve stress resistance. Before planting the fruit, applying plant growth regulators can quickly promote root regeneration and increase root activity.
Early pruning
With the end of the peak period before the Spring Festival, many leaves on the plant enter the aging period. Although these leaves are still dark green and have no lesions, their photosynthetic efficiency is gradually reduced. It is recommended that the vegetable growers and the fruit picking are synchronized, and the lower aged leaves, especially the old leaves with more spots and yellowing, are kept, the field structure is maintained, and sufficient growth space is reserved for the new leaves, which is beneficial to the rapid recovery of the plants and the flowering results after the Spring Festival. the amount. Cucumbers and other vegetables that need to be vines should also pay attention to the height of the vines. It is better to use about 1.4 meters after the vines to fall, avoiding too few leaves and affecting the growth.
The organic nutrients required for root growth are almost all from the supply of leaves. Before the festival, the root system is weakened. After the festival, attention should be paid to the supplement of the leaves to maintain the good state of the leaves. The foliar fertilizer can be sprayed continuously for 5-7 days, which can supplement the nutrition of the leaves and improve the stress resistance.
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