Leaf area analyzer for tomato leaf area measurement
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The effective accumulated temperature method simulates the leaf area as a function of the growth period (determined by the effective accumulated temperature). However, in the greenhouse crop production process, the presence of greenhouse insulation facilities and heating and cooling measures do not necessarily synchronize the temperature and radiation in the greenhouse. The effective accumulated temperature method only considers the temperature and does not consider the impact of radiation on the leaf area, so the simulation results Poor. The specific leaf area method multiplies the simulated leaf dry weight by the leaf area SLA to obtain the leaf area.
However, specific leaf area SLA has a great influence on fertilization, water supply, and crop growth period. It is only applicable to the growth of crops where fertilizer and water conditions are not limited (eg, inorganic substrates such as rock wool or perlite, which are easily controlled by the root environment). Simulation forecast. Under soil culture or organic substrate cultivation conditions, due to the more difficult to control the root environment, more or less water and fertilizer deficits will occur during the growth of tomato, and the specific leaf area will change with the growth period and thus be broken and difficult simulation. The photosynthesis-driven crop growth simulation model is extremely sensitive to the leaf area SLA, and the tiny specific leaf area simulation error will lead to larger leaf area index simulation errors, which will greatly affect canopy photosynthesis and dryness. Material production simulation accuracy and model stability. In addition, the measurement of specific leaf area can only be obtained by destructive sampling, which also limits the practicality and usability of the crop growth simulation model.
In order to avoid canopy photosynthesis calculation error caused by the leaf area index simulation error, this study first established a calculation model of greenhouse tomato leaf area by experimental studies of different substrates, varieties and locations, and then combined the model with existing photosynthesis. The combination of action-driven crop growth model and tomato photosynthesis and dry matter production model suitable for Chinese planting technology provide a theoretical basis for tomato greenhouse growth and yield prediction and tomato cultivation management regulation in China.
The leaf area meter measures the area of ​​the blade, which is fast and efficient, and the instrument does not have any damage to the blade. It is intact and the size of the leaf area will also affect the respiration of the plant. The larger the area, the stronger the respiration. Conversely, the weaker the respiration, the leaf area meter produced by Top Instruments is small and portable.