Summary of common problems in greenhouse vegetable management (with questions and answers)
Why do you apply base fertilizer when planting greenhouse vegetables? Why can't I use large water flooding when watering, but use drip irrigation or watering under the membrane? Why can't you directly apply the farmer's fertilizer that is not fully decomposed when fertilizing? These and other issues are all considered in the cultivation of greenhouse vegetables. Next, Xiaobian will briefly talk about the common problems and answers to the problems in greenhouse vegetable management. I hope that everyone can help.
First, why should we extend the lighting time as much as possible?
1. Photosynthesis can be carried out with light vegetables, and light is the driving force for crop photosynthesis.
2. The longer the illumination time, the higher the photosynthesis efficiency, the more organic matter is produced, and the light of vegetables is beneficial to increase the yield and quality of vegetables.
3, the northern winter needs to extend the light time, when the sun comes out, uncover the quilt or grass hoe to light, cover the quilt after the sun sets.
Second, why is it necessary to uncover the quilt in the snowy weather?
1. Although there is no direct sunlight in the snowy weather, there is still some scattered light. Uncovering the quilt can also allow photosynthesis of vegetables.
2. Pay attention to the snow covered on the membrane of the cleaning shed.
Third, why should greenhouse vegetables be temperature-changed?
1. The temperature affects the growth and development of crops, promotes metabolism and so on.
2. Due to the difference in temperature at early noon, greenhouse vegetables can also be temperature-changed by using the temperature difference of different time periods to adjust the growth of vegetables purposefully.
3, can cover the shed film, uncover the quilt and release the wind, scientifically and rationally control the temperature changes in different time periods, and promote the growth of greenhouse vegetables.
4. Why do you advocate drip irrigation or watering under the membrane?
1. Drip irrigation or watering under the membrane can effectively avoid evaporation of water, avoid high humidity in the greenhouse and prevent the growth of germs.
2, drip irrigation or watering under the film Note: look at the watering, pouring small water.
3, when watering in winter, it is not possible to flood the water. The first time you need to pour small water or drip irrigation, the second membrane watering can effectively reduce the evaporation of water into the air, control the humidity in the greenhouse, and reduce the incidence of disease.
5. Why is it not possible to use the surface tillage soil as the back wall soil when building a new greenhouse?
Because the soil of the plough layer is poor in permeability, the soil and fertilizer contained in the soil are not much, and it is difficult to be absorbed by the roots, which tends to cause slow growth of the vegetable plants and yellowing of the leaves.
6. Why do vegetables need to apply base fertilizer?
1. Vegetables need a variety of fertilizer nutrients during their growth, especially after flowering.
2. The base fertilizer can supply the nutritional needs of the entire growth process of the vegetables.
3, the base fertilizer is conducive to the growth of vegetable roots, so that vegetable plants grow more robust.
7. Why do you have to apply fully decomposed farmyard manure?
1. Incompletely decomposed farmyard manure will not only cause rooting of vegetable plants, but also cause the roots to stop growing or rot.
2. The farmer's fertilizer that is not fully decomposed contains a large amount of harmful substances, which is not conducive to plant growth, and is likely to cause diseases such as blight, verticillium, nematodes and roots.
3. The farmer's fertilizer with fully decomposed farmyard manure can not only effectively control pests and diseases, but also promote plant growth and increase yield and quality.
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