After planting seedlings, most vegetable farmers take measures to control water and fertilizer in order to squat seedlings. If the temperature is high and drought in the shed, the root system does not absorb enough water, which will cause the yellow leaf phenomenon, or the root system of the seedlings has not recovered well just after the planting, which is caused by the lack of water in the plant. To this end, watering must master the principle of timely and appropriate amount, it is best not to water at noon on a sunny day, so as not to cause damage to the root system. You may consider applying some fertilizer to supplement the plant's nutrients, or spraying foliar fertilizer. Leaf picking should be done in stages Proper and reasonable leaf picking can not only reduce nutrient consumption, promote fruit coloring, but also avoid the canopy closure in the field and prevent the occurrence of diseases. But don't pick too much at a time, so that the lower part of the plant becomes almost a stalk, and the leaves should be picked in stages. As a result, fewer leaves should be picked in the early stage. If the leaves are picked, they should be removed from bottom to top. Do not pick leaves before the main branch sits in fruit. Because the lower leaves are also responsible for making nutrients and supplying root growth. If there are many eggs in the lower leaves or heavy yellowing, they should be removed in time. What are the little black spots of Chinese cabbage Chinese cabbage small black spot disease is a physiological disease, which is caused by excessive nitrogen fertilizer application and excessive accumulation of ammonium nitrogen in the cabbage, which causes physiological disorders caused by nitrogen metabolism disorders in plant tissues. Although it will not cause a reduction in production, it will reduce the commercial properties of Chinese cabbage. The disease usually does not develop at the seedling stage, but it starts to appear in the rosette stage or the early stage of the pericardium, and will increase during storage and transportation. In addition to selecting the right varieties and applying nitrogen fertilizers reasonably, harvesting with outer leaves, small black spots occur lighter. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone Infrared heat pad,Far infrared heating pads,Infrared heating pads,Small infrared heating pad Guangzhou Fuerle Health Technology Co., Ltd , https://www.fuerlegroup.com
Why do squat seedlings have yellow leaves