After a short cut of the pear branches, due to the reduction of some branches and buds, the vigorous growth of the cut branches is promoted, the growth is prosperous and the consumption of nutrients is relatively increased, thus affecting the accumulation of early nutrients, Not conducive to the formation of flower buds.
Regardless of the long branches and the middle branches, the shorter the more severe, the harder it becomes to form flowers. Light and short cuts are made on medium and long branches, although the proportion of short cuts tends to become flowers, but the amount of flowers that are not cut is still reduced. If the short cuts are too heavy and there are more prosperous long stems, not only the pruned branches will not easily form flower buds, they may even affect other shoots in a large area nearby, and it is difficult to form flower buds.
Although short cuts are not conducive to the formation of flower buds, it is also necessary to look at the tree's accumulation of nutrients during flower bud differentiation. If the nutrient status of the whole tree and the pruned section is higher than the nutrient level required for flower bud formation, flowering can still take place; if the nutritional status of the whole tree and the pruned section cannot reach the necessary nutritional level for flower bud formation. , then, no matter whether it is short or short, no flower buds can be formed;
If the amount of nutrients accumulated by the tree has reached the level required for flower bud differentiation, then even if it is to the pruned section, it will have an adverse effect, and the rest of the branches can still form flower buds. If more flower buds are formed on trees that grow weaker.
Then, after short cutting or shredding of the branches, the number of flower buds is reduced, consumption is reduced, and the nutritional status of the shoots is improved. Therefore, the quality of the flower buds can be improved and the fruit setting is also facilitated.
Hematology analyzer is also called clinical blood cell analyzer, blood cell analyzer, blood cell analyzer, blood cell counter. The blood analyzer not only improves the accuracy of the experimental results, but also provides many experimental indicators, which play an important role in the diagnosis and differential diagnosis of diseases. Hematology analyzer is one of the most widely used instruments in hospital clinical testing.
Test items
Blood cell test refers to routine blood test, which is manual operation and counting under the microscope at first. It includes red blood cell, hemoglobin, white blood cell count and its classification, platelet count, etc. There are more than 20 items.
clinical significance
1. The blood analyzer is mainly used to detect various blood cell counts, white blood cell classification and hemoglobin content.
2. Hematocrit: obtained by multiplying the average volume of red blood cells by the red blood cell count.
3. Red blood cell distribution width: represents the degree of consistency of red blood cell size. When the red blood cell size is uneven, the red blood cell distribution width value increases, such as various types of nutritional deficiency anemia.
4. The three average indices of red blood cells are used to identify the type of anemia.
(1) The average hemoglobin content of red blood cells: increased in megaloblastic anemia, decreased in iron deficiency anemia, chronic blood loss anemia, uremia, chronic inflammation.
(2) Mean volume of red blood cells: increase in hemolytic anemia and megaloblastic anemia; decrease in severe iron deficiency anemia and hereditary spherocytosis.
(3) The average red blood cell hemoglobin concentration: decrease in chronic blood loss anemia, iron deficiency anemia; various diseases can be in the normal range. In megaloblastic anemia, the mean red blood cell volume increases, the mean red blood cell hemoglobin amount increases, the mean red blood cell hemoglobin concentration is normal, and the red blood cell distribution width increases.
5. Average platelet volume: the average volume of each platelet, the size of platelets is related to its function.
(1) Increased: seen in patients with idiopathic thrombocytopenic purpura, edema and proteinuria in late pregnancy.
(2) Decreased: seen in non-immune platelet destruction, aplastic anemia, thrombocytopenia repeated infection syndrome, chronic myeloid leukemia, etc.
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