One should pay attention to checking the operator's license. When buying seeds, first of all, you must check the qualifications of the operators, that is, whether there are business licenses issued by the business sector, and business licenses issued by the relevant departments.
Second, we must pay attention to the purchase of species certificates to purchase species certificates is an important basis for consumer rights protection, operators are obliged to provide for consumers, and will purchase the date, species name, specifications, quantity, price and other major items to fill out clear, signature, cover The chapter is handed to consumers.
Third, we must pay attention to viewing the product in the purchase of seeds, we must carefully check the seed packaging, labels and company name, address, production date, etc., do not buy seeds of unknown origin.
Fourth, pay attention to the use of methods In addition to listening to the operator's use of the introduction of the seeds, the more important thing is to carefully read the variety introduction, cultivation points, to avoid loss due to improper use.
Fifth, we must pay attention to the preservation of the sample is best to retain a small amount of sample, once the seeds have quality problems, the samples can be sent to the relevant departments for detection, in order to benefit rights.
Sixth, it is necessary to pay attention to the rights protection. If it is found that the seeds purchased are fake seeds or there are consumer disputes, complaints may be filed with the local seed management department or the administrative department for industry and commerce.
Venlo structure is a popular one at present. This architecture uses horizontal girder as main bearer, forming a stable structure with columns. There is consolidation between horizontal girder and column, and hinge is used to connect column and foundation.
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. The steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using the hollow double-layer or multilayer PC board.
PC board is mainly made of PC/PET/PMMA/PP materials, it need sun screen coating to resist ultraviolet resist and ageing, and it is also required to be anti condensation and antidrug.
As a kind of light material, use PC board can greatly reduce the weight of greenhouse structure, and corresponding reduced the size of the steel frame, which saving the cost of steel.
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JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com