In the past two years, there have been more and more nursery factories around the country, and more and more vegetable farmers have set seedlings at nursery factories. Due to the uneven technical level of nursery factories, the quality of seedlings produced is not the same. Some seedlings planted by nursery factories have poor growth potential after planting, and often cause serious losses to growers. Therefore, vegetable farmers must be careful when buying seedlings. After all, whether the seedlings are good or bad is related to the yield and benefits of vegetables. It cannot be ignored. So, what kind of seedlings can be purchased with confidence? The author believes that the three criteria should be grasped before purchasing seedlings: First, whether the seedlings are robust. Strong seedlings are an important material basis for the high yield of vegetables. The external appearance of ordinary vegetables is: The seedlings grow robustly, are of moderate height, are neat and tidy, neither leggy nor aging, the leaves are large and thick, the leaf color is normal, and the cotyledons and leaves are not prematurely exfoliated or turned yellow. Developed, with high dry matter content; fruit and vegetable vegetable seedlings have early flower bud differentiation and good development. The standards for seedlings of different vegetables are not exactly the same. For example, cucumbers: 3 to 4 leaves, thick leaves, deep color; thick stems, short internodes, seedling height less than 10 cm, cotyledon intact. Tomato: It has 8 true leaves, green leaves, buds but not open, 0.5 cm thick stems, and 20 cm or less seedlings. Chilli: with 10 to 12 leaves, large and thick leaves, dark green leaves; stems 0.4 to 0.5 cm, seedling height 15 to 20 cm, the first flower buds are now. Eggplant: There are 5 to 6 leaves, about 15 cm in height, and other peppers. Second, whether there are lesions on the blade. The seedlings are sick and there are endless troubles. Therefore, be sure to carefully inspect the seedlings for lesions before buying seedlings. Occasionally, if there are lesions on the leaves, it is understandable that they can be cured by drugs in later management. If there are too many lesions on the leaves, do not buy them, so as to avoid the future growth and yield of seedlings due to diseases. It depends on whether there are virus-infected seedlings. If it is found that the seedlings are black and green, or if the leaves are spotted or deformed, the virus-infected seedlings should be suspected. Do not use them, and do not purchase them. Third, whether the hormone suppression too heavy. Many vegetable farmers have a misunderstanding on the understanding that leaves with dark green leaves and thick and short stems are robust standards. Some nursery factories have found out about this peasant's psychology, spraying a lot of hormones in the process of nursery, and the result is often due to excessive hormones leading to seedling hormone poisoning, thus inhibiting the head. In addition to the dark green leaves and short thick stem sections of the seedlings with excessive hormones, the stems of the seedlings are very brittle and easily broken. After planting, not only slow seedlings are slow, but also the growth in the later period is very poor. The yield is low and it is also prone to premature aging. Therefore, when the seedlings see such seedlings at the time of purchase, they must not purchase them to avoid loss. NINGBO MEDICAL EQUIPMENT CO.,LTD , https://www.techartmeds.com