The first is a small number of times, which is the most important principle and can meet the characteristics of plants that continuously absorb nutrients.
The second is to make sure that the nutrient balance, especially drip irrigation. Because in the case of drip irrigation, the dependence of the crop on the soil is reduced and the dependence on the fertilizer is higher.
The third is to pay special attention to the electrical conductivity. The main reason is to prevent the fertilizer from burning out the foliage and roots, especially when using sprinkler irrigation and micro-sprinkling. Because the fertilizer concentration is too high, the water evaporates and the leaves burn immediately.
The fourth is to avoid excessive irrigation. Most of the water-soluble fertilizers contain fast-acting nitrogen and are over-irrigated. The available nitrogen is easy to run off with water, causing waste.
The fifth is to understand the application of irrigation facilities and the pH of the water, to avoid precipitation of fertilizers when applied, and to reduce the effectiveness. Especially when applied on saline ground, calcium carbonate and the like are easily produced. You can take a small amount of well water to do some experiments and see how much amount of sediment will produce.
Sixth, pay attention to the uniformity of fertilization.
The bearing structure, fixed film systems and installation of this greenhouse is relatively simple. And due to it, raw material and manufacturing costs are affordable. Except the high strength woven film is higher, other kinds of antidrop film are economical. In general, the comprehensive cost of film greenhouse is lower 30% ~ 50% than the same size and specifications of the other types of greenhouse.
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