How to prevent fertilizer damage in fertilization in greenhouse
Shijiazhuang Naipu Pump Co.,ltd is a professional manufacturer of all type of horizontal centrifugal slurry pumps. Our horziontal centrifugal slurry pumps including:NP-AH,NP-AHR,NP-HH,NP-M which are designed for handing highly abrasive,high density slurries in the metallurgical,mining,coal,power, building material and other industrial department,etc.The pumps of this type also maybe installed in multistage series.
NP-G,NP-GH gravel and sand slurry pumps are designed for continously handling the most difficult higher abrasive slurries which contain too big solids to be pumped by a common pump. they are suitable for deliverying slurries in mining.Explosive-sludge in metal melting,dredging in dredger and course of rivers,and other fileds.Type NP-GH pumps are of high head ones.
NP-Lseries pump are suitable for delivering lower abrasive,lower density slurries for metallurgical,mining,and building material departments.The shaft seal adopt gland seal and centrifugal seal.
And Naipu also produce many other types of Horizontal slurry pumps,such as NP-M,NP-ZG,NP-WS dredging pump and NP-ZJW Feeding Pumps,etc.
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2. The main measures for preventing vegetable fertilizer damage in greenhouses are as follows:
The first is to control the amount of fertilizer, which is suitable for the mid-range level.
The second is to master the principle of thin fertilizer and diligent application. The dosage of chemical fertilizer should not be too much. The ammonium sulfate is less than 15 kg/mu, the urea is less than 8 kg/mu, and the superphosphate is less than 25 kg/mu.
The third is to increase the application of organic fertilizer to improve soil fertility, but it is not appropriate to use unfertilized organic fertilizer.
The fourth is to promote full-scale deep application or ditch application of soil, it is not appropriate to spread on the soil surface.
Fifth, NPK and trace element fertilizers should be combined with application.
Sixth, in the summer, use precipitation and irrigation to wash salt.
Seven is to deep-plow the soil or add the guest soil, or rotate the greenhouse to plant, in order to reduce the surface salt.