In the rural yard, many people like to plant some fruit trees, the most common are pomegranates, walnuts, persimmons, pear trees, peach trees and so on. Walnuts are high-nutrition foods, and walnut trees in the yard are a good choice. So what should I plant? What kind of variety should I choose? Let's take a look at it.
Walnut tree growth habit
Walnut trees are cultivated in many areas of China. It is a kind of environment that likes warm and humid, and has poor cold tolerance. The suitable growth temperature is about 15 degrees. It is best planted in soil with loose soil, good water retention and strong gas permeability. .
How do you choose a variety of walnut trees?
Planting walnuts in the yard is not like large-scale planting of orchards. The walnut trees required for planting in the courtyard require more results and are easier to manage. However, people who have planted walnuts should know that the results of walnut trees are relatively late. If grafted walnut trees are not used, it will take 6 years to get results. This long wait is not acceptable to many people. Therefore, when we choose walnut seedlings, we should choose early walnut tree varieties, usually in the second year after planting.
The planting time and key points of walnut trees?
1, planting time
Walnut trees can be planted in spring and autumn. The northern region is suitable for planting in autumn from October to November, because the spring weather in the northern region is relatively dry, and the roots of the walnut trees are prone to wounds during planting, which is more suitable for autumn. Planting is conducive to the healing of wounds. Spring planting is suitable for March to April each year.
2, before planting
The varieties of cultivated walnut trees are preferably selected from two to four years old, and their survival rate is higher. Before planting, properly pruning, cutting off the diseased branches and dead branches, and retaining the strong branches. If the walnut trees have flower buds, the male flower buds can be removed and the female flower buds are retained.
Also, the root system should be properly trimmed, and some useless roots and roots should be cut off. The length of the rhizome can be determined according to the size of the canopy. The larger the crown, the longer the roots should be, and the disinfectant can be applied to the wound before trimming. Preservatives, etc.
3, planting methods
When planting, the pit should be dug a little, usually 80×80 cm. Add the base fertilizer at the bottom, use the decomposed manure, and lay some soil to avoid direct contact between the root of the walnut tree and the base fertilizer. After planting, cover the soil with water, and water the walnut tree once every week to about ten days. Stop the watering after the soil is frozen.
Generally, the walnut tree can germinate in the spring of the second year, and it needs to be carefully managed after germination. It is very easy to plant walnut trees in the garden. Usually pay attention to pest control, watering, etc. Pay attention to the lack of water when the walnut trees grow. In addition, three times of top dressing can be done every year to ensure that the walnut trees grow very well.
For the wonderful pictures and popular comments on the cultivation of walnut trees, you may be interested in the following recommended contents, welcome to read.
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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