Traditional and classical leaf area competition in many aspects of leaf area size of its own growth and development, light energy use, dry matter accumulation, yield and economic benefits have a significant impact. The size of the leaf area is an important parameter for studying crop growth and development, population photosynthetic efficiency and developing crop cultivation measures and technical standards. The method of measuring the leaf area can be divided into traditional and modern. Modern use is more often used together, such as a portable leaf area meter.
The traditional leaf area measurement methods mainly include the gravimetric method, and a variety of specific measurement methods have been developed based on the principle that the area and mass of the homogeneous material are proportional to each other. These methods include the weighing method, the number grid method, and the like. The traditional method of leaf area measurement is not as timely as the modern measurement method in the measurement process. The traditional leaf area measurement method has simple equipment requirements and low technical requirements, and has unique and applicable scope. It has a wide range of application value, but measuring using the weighing method will cause some damage to the plant. Use the long-width-dimension method to perform the conversion factor, and use the coefficient method to perform regression analysis to calculate and compare the accuracy and speed. .
The method of measuring the leaf area using a handheld leaf area meter is quick and accurate. Portable leaf area meter instruments are expensive, inconvenient for field measurements, and have limitations in using handheld leaf area meters for measurements. Accurate measurement of leaf area index for small areas is relatively accurate and the time is relatively short. However, it takes more time to make measurements on a large scale, and at the same time, the accuracy is reduced accordingly. The most important point is that the measurement of both instruments is performed using the hand-second method, and therefore the measurement is performed. The process is also affected by the operator's scan rate. However, this measurement method has been used very well in agriculture.
Both traditional and classical have their own advantages and disadvantages, all have their own market areas. Until now, no measurement method has replaced another measurement method.
The traditional leaf area measurement methods mainly include the gravimetric method, and a variety of specific measurement methods have been developed based on the principle that the area and mass of the homogeneous material are proportional to each other. These methods include the weighing method, the number grid method, and the like. The traditional method of leaf area measurement is not as timely as the modern measurement method in the measurement process. The traditional leaf area measurement method has simple equipment requirements and low technical requirements, and has unique and applicable scope. It has a wide range of application value, but measuring using the weighing method will cause some damage to the plant. Use the long-width-dimension method to perform the conversion factor, and use the coefficient method to perform regression analysis to calculate and compare the accuracy and speed. .
The method of measuring the leaf area using a handheld leaf area meter is quick and accurate. Portable leaf area meter instruments are expensive, inconvenient for field measurements, and have limitations in using handheld leaf area meters for measurements. Accurate measurement of leaf area index for small areas is relatively accurate and the time is relatively short. However, it takes more time to make measurements on a large scale, and at the same time, the accuracy is reduced accordingly. The most important point is that the measurement of both instruments is performed using the hand-second method, and therefore the measurement is performed. The process is also affected by the operator's scan rate. However, this measurement method has been used very well in agriculture.
Both traditional and classical have their own advantages and disadvantages, all have their own market areas. Until now, no measurement method has replaced another measurement method.