1. Pollination period
Due to the different sowing time and geographical climate in different regions, the pollination period is also different. Generally, it should be performed after the spit is spit out from the female ear.
2, making powder and pollinator
Newspapers or other papers can be folded into caps, or newspapers (made of powderers) can be filled with containers such as basins. Pollinators can be made using 2 cm thick, 4 cm long, one-piece dry bamboo (beverage bottles) Can be used instead, cut a piece of fine gauze (if the mesh can be used two layers) and then use rubber bands to set it in the opening of the bamboo tube.
3, cut flowers
In order to ensure effective pollination, long filaments must be cut before artificially assisted pollination, and can be kept to 2 to 3 cm. Scissors can be made early in the evening and early the next morning. For some species, the leaves of the ear of the ear are too long, and it also affects the spinning. Therefore, it is also necessary to cut off the long loquat leaves in order to allow normal spinning and pollination.
4, collect pollen
The pollen source may be artificial corn-assisted pollination powder of any corn variety grown locally.
There are two types of powder extraction methods, one of which is extraction and use. It is to use the tassel pollen of other corn varieties, put it in the powder-collecting apparatus and shake it lightly, and the pollen is taken. Sunny days are generally performed from 8:30 to 9:30 in the morning. Premature extraction of large amounts of water, it is easy to agglomeration, adverse pollination; rainy days, to wait until the tassel dried on the water after the powder. Another method is hydroponic tassels. It is in the evening that the tassels of the main branches of other corn varieties have been pulled out, placed diagonally in pots containing water, and placed at home to maintain their vitality. In the early morning of the next morning, move to the sun and watch out for the wind. Spread the newspapers around the pots to receive scattered pollen and remove tassels during the flourishing season. Shake properly to collect pollen.
5, filter to miscellaneous
After the pollen is collected, it can be sieved with a small bowl at home, and gauze (filtering off the pollen sac and other debris) can also be used. The pollen can be placed in a clean and dry pollination tube and covered with a silk screen to be used. Note: Do not put too much pollen in the pollination tube to avoid pollen agglomeration in pollination and pollinating.
6, pollination
After dew has dried in the morning, pollination can begin. The best time is from 8:30 to 11:30. Gently shake the pollination tube against the part of the cut filaments, and generally keep it at a distance of about 3 cm. Do not touch the filaments, and avoid the filter stained with water and pollen. In this way, pollination is repeated for each of the ears until the entire field is granted. For each of the ears, artificial assisted pollination was performed at the beginning of silking, during the height of silking, and at the end of silking. It is necessary to have three pollination opportunities per panicle to effectively ensure fertilization and fruitfulness.
Note: After 2 to 3 days, the female silks given the flour are shriveled and dried, and the females who have not been fed flour continue to grow. This means that they must be pollinated again to ensure that the whole field is pollinated.
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
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.
Automation in Hematology,Automated Hematology Analyzer,Hematology Analyzer Instrument,Hematology Analyzer Product
Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com