1. Reasons for psychological consequences: 1. Poor nutrients and nutrient loss. In the era of fruit drop, new shoots continued to develop, and nutrition was consumed for the development of new shoots, forming a fruit drop. Flower bud differentiation is incomplete, causing late fruit drop. 2, poor pollination. Potted ginkgo must be equipped with pollination trees, otherwise the fruit can not be developed, and the fruit in the late stage is serious. In the flowering period, if the rain and rain stretch, affecting the pollination, it is easy to drop fruit. 3. The structure of the tree is unfair. The tree is tall, the branches are too dense, and the wind is not well transmitted. It affects the accumulation of inorganic nutrients in the branches, and the branches develop weakly. The fruits on the branches are easily scattered. 4. Lack of fertilizer and water. The soil is boring for a long time, the soil is thin, the fertilizer and water are difficult to receive, and the fruit is formed. When the soil moisture is too much, the root can be reduced. Even if more fertilizer is applied, the tree body is difficult to receive and use, and the fruit supply will be deficient. 5. Rainfall impact. The late fruit drop of Ginkgo is related to rainfall, and the rainfall is mostly fruitful. This is due to the lack of sunshine in the formation of rain, and the weakening of mutual light assistance, which has caused the fruit of a department in the unlucky part of the nutrient to fail to obtain full nutrition. 2, due to the formation of pests and diseases 1. Ginkgo biloba insect damage. Also known as the tree shrew, the damage to the ginkgo tree is very heavy, often forming a serious fruit drop. 2. The worm is seriously injured. The worm is a kind of beneficial insect that specifically damages ginkgo fruit. It is usually in the summer and early autumn, and the fruit is soft and soft. 3, anthrax injury. As usual, the amount of illness occurred in September, causing fruit drop. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Urinalysis test strips refer to test strips that test for bilirubin, urobilinogen, ketone bodies, ascorbic acid, glucose, protein (albumin), blood cells, PH, etc. in urine. Urine Reagent Strips,Urine Test Strip,Urine Sugar Strip Test,Visual Urine Analysis Strips Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com
Detection principle
1. pH: The pH value in the range of 5-9 is measured by the pH indicator, and the pH value of the fresh urine of a normal person is between 5-7.
2. Nitrite: The reaction is based on the reduction of nitrate to nitrite by Gram-positive bacteria in the urine. The nitrite reacts with p-aminobenzenesulfonic acid to form diazonium compounds, which are then combined with N-(1-naphthalene) )-3 aminopropanesulfonate combined with a pink color.
3. Glucose: According to the reaction principle of glucose oxidase, glucose oxidase specifically oxidizes glucose to generate glucuronic acid and hydrogen peroxide. Under the action of hydrogen peroxide, hydrogen peroxide oxidizes the indicator and turns color. .
Classification
Urinalysis test strips are divided into visual series and machine series. The visual inspection series is divided into several models according to different inspection items; the machine inspection series is divided into several models according to different applicable instruments.
1. Classification by measurement method
1) Visual inspection series
When observing the result, compare the color with the standard color code within the time specified on the color code, judge and read the result.
2) Machine test series.
For instrument operation, refer to the instruction manual of the Urine Analyzer used.
2. According to the number of measurement items
There are single-item, 2-item, 4-item and multiple test strips. Currently, 10-item or 11-item multiple test strips are most commonly used in hospitals.
3. Classification by structure
Urinalysis test strips with single-layer membrane structure and multi-layer membrane structure.