In the large citrus producing areas, citrus fruit size results are very common, which also caused a large fluctuation in citrus production, fruit quality, poor fruit uniformity, fruit small, taste acid, oily rough, thick skin, The increase in malformed fruits, etc., therefore, it is necessary to prevent citrus size in order to achieve stable and high-yield citrus cultivation. With the development of science and technology, the use of plant leaf area meters and other scientific instruments to carry out research, and to guide the scientific agricultural production and planting operations, has become an effective program to prevent the size of citrus.
To overcome citrus size and annual results, the most effective method is to have adequate nutrition, cultivate robust trees, and maintain a balance between vegetative and reproductive growth. Before the value, it is necessary to determine the size of the citrus in that year, and the most effective method is to use the plant leaf area meter to measure the size of the orange leaf area index after winter, and determine the effective time from the steady rise of temperature to before flowering. Within a certain range, the greater the leaf area index, the higher the yield. According to the measured data of the plant leaf area measurement, the following three kinds of judgment results can be obtained:
First, the average leaf area index greater than 3.5 can be judged as a big year.
Second, the average leaf area index of less than 3 is judged as small year.
Thirdly, if the average leaf area index is less than 2 trees, even if it is difficult to achieve the desired results, Baoguo should give up the fruits, strengthen management, restore the tree vigor, and ensure a good harvest for the following year.
In fact, the function of the plant leaf area meter is not only to determine the leaf area index, and then determine the size of the citrus according to the measurement results. In fact, it can also be used to guide and improve the agricultural production process, for example, to cultivate good vigor through pruning. To increase the photosynthetic rate of orange trees and increase their ability to absorb water, etc., in order to achieve the effect of preventing the size of citrus, increasing the production and quality of citrus orchards, and finally achieving the goal of increasing or increasing the production of orchards.
The formation of fluoride crystal mica is a sub-grade, and does not adsorb impurities. It was selected by the Chinese Academy of Sciences Environmental Biology Research Center Peking University, Tsinghua University, Shanghai Fudan University, Nanjing University, and more than 100 national research institutions and universities for AFM substrate After (microscopy carrier wave), the relevant person said: Compared to natural mica, fluorite mica has better flatness and less adsorption impurities. The images observed in the analysis of the DNA structure, especially in the 1 nm to 100 nm scale, have observed surface interference fringes not found in the natural mica experiment, which are clearly dozens of times better than the natural mica substrate. Experts involved in the experiment believe that the use of fluoride mica instead of natural mica as a substrate material is expected to catch up with the international level.
The main performance in the field of atomic force microscopy:
Beijing University of Technology, Zhejiang University, Shanghai Jiaotong University, Xi'an Jiaotong University, Harbin Institute of Technology, Jilin University, Northeast Normal University, Shaanxi Normal University, Sichuan University, China University of Science and Technology, Chongqing University, Tongji University, Shenzhen University
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