Cabbage and cabbage (ie, cabbage) are vegetables that are in great demand in China. In this issue, experts are invited to talk about the fertilization techniques for these two vegetables and to answer questions raised by farmers in this regard. Experts (Professor Wang Xingren from China Agricultural University): Chinese cabbage and cabbage are all cabbage leafy vegetables. Their common features are: 1. High yield; 2. Require N, P, K combined application, demand for nitrogen, potassium, calcium and boron Relatively high; 3. In addition to basal fat, rosette period and pre-packaged period is the key period of topdressing. Question: In view of the characteristics of fertilizer requirements for these two types of vegetables, how can we rationally apply fertilizer? Experts: Basal fertilizer: Mushi decomposed organic fertilizer 3-5, urea 9-11 kg, diammonium 15-20 kg or superphosphate 40-50 kg, potassium chloride or potassium sulfate 15-20 kg. Or application of compound fertilizer, 30-50 kg per mu. Topdressing: Mushi 7-10 kilograms of urea during the lotus root period, and 20-30 kilograms of urea per acre at the time of the infilling period, of which more than half are in the early period of Baoxin, and a half are in the middle of Baoxin. Question: If the land is relatively thin, can it be used to promote the growth of seedlings? Expert: Of course you can. Application of 3-5 kg ​​urea or diammonium per acre, in two ways: can be applied to sowing holes or ditch before live broadcasting, and fully mix with the soil, then watering sowing; or after the dregs, to promote seedlings Grow. Question: Mr. Lin from Beijing asked: The north is a calcareous soil, and there is no shortage of calcium. Why does Chinese cabbage often appear as a "dry heart?" How to prevent it? Experts: Chinese cabbage requires a large amount of calcium, prone to dry heartburn. This is not because the soil lacks calcium, but because of soil drought or salt concentration is too high, inhibiting the absorption of calcium by Chinese cabbage. If organic fertilizer can be properly added to keep the soil moist, and spray 0.3%-0.5% calcium chloride or calcium nitrate solution every 7 days or so in the Chinese cabbage growth period, and spray it 2-3 times in succession, it can be effective. To control cabbage "dry heart". Question: Does the Chinese cabbage fertilization technique apply to cabbage cabbage? Experts: The Chinese cabbage fertilization program basically also applies to cabbage. The difference is that most cabbages are transplanted and transplanted. They are divided into spring cabbage, summer cabbage, and autumn cabbage because of different cultivation seasons. In the fertilization should pay attention to the cultivation of strong seedlings, due to the appropriate length of growth period fertilization amount. In addition, cabbage is more prone to boron deficiency. It can apply about 1 kilogram of borax when applying base fertilizer or spray 0.2% borax solution at the beginning of the ball. Question: Mr. Liu from Texas in Shandong asked: What is the difference between fertilization of cabbage seedlings and fertilization before transplanting? Experts: The main difference is that they should be formulated with fertile and nutritious soil with good physical properties and soil disinfection. If it is early spring nursery, it also needs a certain amount of insulation and windproof equipment. Question: Mr. Hou from Shijiazhuang, Hebei Province asked: Can Chinese cabbage be used for continuous cropping or radish rotation? Experts: Chinese cabbage cannot be used as a continuous crop, and it cannot be rotated with cruciferous vegetables. Radishes are cruciferous, so they cannot be rotated. Aluminum Extrusion Curtain Wall Profile Aluminum Extrusion Curtain Wall Profile,Conventional Aluminium Profiles,Curtain Wall Aluminum,Modern Curtain Wall Building Guangdong Huachang Group Co., Ltd. , https://www.huachangaluminium.com