During the flowering period of potato, 15 randomly selected plants were selected from each variety. Two functional leaves were selected from each plant. Leaf length and maximum leaf width were measured after being placed flat, and then the shape of the leaves was accurately depicted on standard A4 paper. After the mold was dried, the weight was weighed on a 1/10000 electronic analytical balance. Thirty leaves were determined for each species. The coefficient is obtained by dividing the actual area of ​​each leaf by the product of length and width. Finally, the average value of each leaf coefficient is taken as the correction coefficient (K value). It is also possible to measure the leaf area by this method, but its tedious features have been exposed. Therefore, the application of the leaf area meter in the determination of the patch area is quick and accurate.
The number of plants and the total mass of each variety were recorded at the time of harvest, and the tubers were sorted by mass. For each variety, select 5 to 6 tubers weighing 0.05kg or more, weigh them, cut them into thin slices, bake them in an oven until they reach constant weight, and immediately weigh them after they are taken out. Dry weight is the percentage of dry matter that is obtained from the fresh weight. content. The dried flakes were crushed using a Dade brand shredder to obtain a dry powder for quality analysis. Soluble sugars and soluble proteins were determined with the anthrone-sulfate method and the biuret method, respectively, and the starch content was determined with an iodine colorimetric method.
The leaf area of ​​five varieties using the leaf area meter was determined and the corresponding yield analysis found a significant positive correlation, indicating that a relatively large leaf area is conducive to increasing the economic yield of the potato. The formation and quality of crop yield depend on the output of photosynthetic organs to storage organs. The main purpose of field management measures such as irrigation, fertilization, pruning, and cultivation of improved varieties is to improve their photosynthetic performance and increase economic output. Although leaf area is not necessarily proportional to the total photosynthetic area of ​​crops, LAI is more commonly used in agricultural production. However, studies have shown that the leaf area of ​​crops is positively correlated with yield.
High Frequency Welding Tube Mill
Our High Frequency Welding Tube Mill is intended for manufacturing of round pipe of Φ16mm-Φ127mm with thickness of 0.5 mm–5.0 mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths.
Finished product can be of round, square or rectangular pipes.
Pipe diameter: Ø16–Ø127mm
Pipe Thickness: 0.5– 5.0mm
Pipe Length: 6-9m
Length Tolerance: 0-3mm
Material: Low Carbon steel (δb≤500Mpa, δs≤235Mpa)
Inner diameter: Φ580-Φ610mm
Outer diameter: Φ900-1500mmStrip steel thickness: 0.5mm-5.0mm
The maximum weight: 5.0 tons
Dynamic power: AC380V±10%, 3phases, 50Hz±10%
Control Power: AC220V±10%, one phase, 50Hz ±10%
Electric installed capacity: appro 450KW
Reservoir for High Frequency equipment:15 m³, one set
Reservoir for circulating cooling water:15 m³, one set
f) High Frequency Welding Tube Mill Compressed air:
Pressure: 0.4Mpa
Flow: 0.5m3/h
g) High Frequency Welding Tube Mill speed:
30-90m/min
Why choose to cooperate with us ?
1. We are professional manufacturer, so we can offer better price and after-sale service and shorter delivery time.
2. We have strong design & technical ability, we can design and manufacture as customer's requirement.
3. Our factory has been approved ISO 9001 certificate.
4. We have much experience for installation and training experience overseas.
5. We have successfully exported our machines to more than 90 countries, We all get good feedback.
6. We provide a free two years warranty for all our items.
7. OEM brand.
1.How to get a quotation of tube rolling line ?
Give me the diameters and thickness for the pipe .
Other spicific requirements is welcome, such as the speed,power and voltage you want.
2. Terms of payment ?
30% T/T, Balance to be paid before shipping after inspection.Also we accept the payment L/C, O/A , D/P.
3. What is your after-sale service ?
High Frequency Welding Tube Mill warranty period is 24 months, if the broken parts can't be repaired, we can send new to replace for free, but you need to pay the express cost yourself. we supply the technical support for the whole life of the equipment.
4. How to visit your factory ?
a.Fly to Beijing airport: By high speed train From Beijing Nan to Cangzhou Xi (1 hour), then we can pick up you.b.Fly to Shanghai Airport: By high speed train From Shanghai Hongqiao to Cangzhou Xi(4.5 hours), then we can pick up you.
Steel Pipe Roll Forming Machine
Steel Pipe Roll Forming Machine,Carbon Steel Pipe Making Machine, High Frequency Welding Pipe Making Machine,Steel Pipe Making Machine
Zhongtuo Roll Forming Machinery Co., ltd , http://www.rollsformingmachines.com