Some corn growers responded that the corn leaves in their homes were originally normal green, but after a few days, they turned pale green, and after a while, yellowing occurred, and the area gradually expanded to the end. Serious, the whole piece looks yellow, while others are green and oily, forming a sharp contrast. After the yellow leaves of corn seedlings appear, they must attract everyone's attention, which not only affects the normal growth of corn, but also the empty rods or baldness in the later stage. The reduction of production can't be avoided. The following is a summary of Huinongwang Xiaobian. The reason for this situation and the prevention and prevention methods, I hope to bring some help to my friends. There are four main points: 1, seed quality problems, the seeds purchased may be old, or not full, or other reasons, anyway, the quality is not particularly good, in this case, the seeds themselves have problems, the growing corn seedlings will appear The yellowing of the leaves. In this case, the first is prevention, that is, when purchasing seeds, do not choose some seeds of miscellaneous brands, try to buy seeds that have been planted well in the local area, and only find the seeds after planting, timely topdressing and spraying foliar fertilizer To provide the nutrients needed for growth. 2, caused by sowing too deep, corn can not be too deep (not more than 5cm), once too deep, the nutrients consumed by corn growth will increase, on the one hand is not emergence, directly under the ground, another side After emergence, it is also a weak seedling, and then as it continues to grow, the leaves will slowly turn yellow. The prevention and control measures of this kind of situation are firstly prevented in advance, that is, the sowing depth is between 3-5cm. After sowing too deep, if the seedlings are lacking, it is necessary to replenish the seedlings in time. If weak seedlings appear in the growth, pay attention to them. Topdressing and spraying foliar fertilizer for relief. 3. The problem of excessive planting density and high planting density. Some friends think that the more seeds are planted, the more the final output will be. In fact, this view is wrong. When the corn planting density is high, it will compete for nutrients with each other, and the field Ventilation and aeration will decrease, affecting the growth of the whole field of corn, and the corn leaves will show symptoms of yellowing. At this point, there are also 2 points to solve. The first one is to pay attention to the next amount when planting. Under normal circumstances, about 8 kg per mu (depending on the specific situation), the second is 3-5 leaves in corn. At the time, the seedlings are carried out, that is, the relatively crowded seedlings are unplugged, and they are not reluctant, which is good for the growth of the corn behind. 4. The yellowing of corn seedlings caused by lack of fertilizer in the field. This situation is often caused by insufficient application of base fertilizer. Corn is a crop with nitrogen, so the supply of nitrogen fertilizer should keep up. If the nitrogen fertilizer is applied too little at the time of sowing, Urea should be applied in time to promote the normal growth of corn. The above 4 points are quite common situations. Of course, some friends said that except for the above 4 points, it will not be caused by pests and diseases. This is not ruled out because pests and diseases are relatively easy to judge, so I will not say much here. It is.
Urinalysis strip is a strip that tests for bilirubin, urobiligen, ketone bodies, ascorbic acid, glucose, proteins (albumin), blood cells, PH, etc.
1. Dip the test paper into the fully stirred fresh urine and take it out in time; Pet Urine Strips,Pet Urine Test Kit,Pet Urine Test Strips,Animal Urine Test Strips Changchun LYZ Technology Co., Ltd , https://www.lyzstrips.com
2. Put the test paper on the edge of the container to drop excess urine or put it on a paper towel to suck away excess liquid to reduce interference.
3. Judgment:
(1) in the time specified on the color code and the standard color code for color, judgment and read the results;
(2) For the operation of the instrument, please refer to the manual of the Urine Analyzer used.
4. When the test paper is visually tested, the reaction results are valid for interpretation within 60 seconds, and the interpretation beyond 60 seconds is invalid.