Solve the problem of slow growth of greenhouse vegetables
After entering January, at the coldest time of the year, for the vegetable growers who grow winter vegetables in greenhouses, it is also the most difficult stage of management during the year. The drop in temperature directly leads to a drop in ground temperature, resulting in poor vegetable roots, affecting the growth of vegetables, slowing down the growth of vegetables, and even causing a "shut-down" phenomenon, leading to reduced yields of vegetables and even no yield.
Overwintering alfalfa grows slowly, and its fundamental problem is that the roots grow weaker. The main causes of vegetable root ageing are:
1. If the ground temperature is insufficient, the root growth of vegetables should be maintained above 12°C, and new roots can grow. If the ground temperature is insufficient, no new roots of vegetables will be directly produced.
2. Soil compaction and salinization seriously affect the roots undershooting and renewal. The growth rate of new roots cannot keep up with the rate of necrosis of old roots, resulting in less new roots, and excessive weight build-up and salinization will aggravate the root collapse phenomenon. .
3. Diseases caused by root diseases, Fusarium, Pythium, and other soil-borne diseases severely impair the growth of plants, causing no new roots, and severe death.
In order to solve the problem of slow growth of vegetables, we must start with the root system, and promote the development of the roots.
1. Control fertilization. Many farmers see that the growth of vegetables is slow, they think that it is due to insufficient fertilizer, and they begin to over-fertilize. In fact, the more fertilizer, the more it will affect the roots of vegetables. Therefore, if water shortage can be watered during this period, the amount of chemical fertilizer must be controlled.
2. Promote root rejuvenation. If the growth of vegetables is already weak, supplemental fertilizers will not work well and the roots will not absorb them. First, 500 grams per acre red schistosomiasis + 150 grams of boron and zinc fertilizer in Ciba, strong rooting seedlings, improve growth, and promote root rejuvenation. The purpose of stimulating rooting is achieved by adding Bacillus to improve the growth environment around the roots. At the same time, supplementing boron fertilizer promotes the extension of capillary roots and supplements zinc fertilizer to increase the resilience of vegetables.
3. Solve soil compaction and salinization problems. This is the basis for the promotion of root barrowing. Only by creating a safe and favorable root environment can the growth of vegetable roots be ensured and the root system deeper. Can be applied per acre of 1 kg of sorghum soil + soil Jiamei 200 ml, and then watering. The loose soil essence is applied to the rows of vegetables to loosen the soil and change the soil into a granular structure that promotes rooting.
4. Leaf fertilizer to stimulate growth. Foliar spraying Yejiamei 1000 times solution + Jiayuan dihydrogen potassium 500 times solution, spraying 5 to 7 days, even spraying 2 or 3 times, leaf surface supplemented with phosphate fertilizer, potash fertilizer and alginic acid, can also stimulate Vegetable rooting can also reduce the ageing of vegetable leaves and make the vegetables grow faster.
Note that whether it is watering or spraying, be sure to choose sunny weather, not cloudy. In addition, watering should be used to pour water, and flood irrigation should not be conducted to prevent the ground temperature from falling too far.
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