In
a hydroponic system, plants are placed in nutrient-enriched water. Mediums such
as gravels, sand or vermiculite can also be used. Thus plants which are placed
in the water absorb the nutrients very easly. When the nutrients from the water
starts finishing , water is recycled or additional nutrients are added.
Greenhouse Garden Hydroponics,Hydroponic Garden,Hydroponic Greenhouse JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.skyplantgreenhouse.com
Pollution-free mustard cultivation technology
Mustard, also known locally as a vegetable head, is a variant of mustard, belonging to the order Brassica, Brassicaceae, Brassica in plant taxonomy. Mustard nutritious, delicious and delicious, with fresh, fragrant, tender, crisp features, making people not tired. Fuling mustard is one of the three famous pickled vegetables in the world and is well-known both at home and abroad. The vegetable head has been cultivated for more than 100 years in Fuling, and is also the main agricultural product for local export earnings, which has high economic benefits. 1 The environmental conditions are selected to be far from the pollution-free cultivated land of industrial and mining enterprises. The altitude is between 300 and 600m. The optimum temperature for the entire fertility process is 7°C～21°C, accumulated temperature 2449.8°C～2485.9°C, sunshine 377.8～409h, rainfall 343.9～355.3mm, relative humidity 73%～89%, soil pH value 6～7. About gray and brown purple soil, red brown purple soil and brown purple soil are preferred. Soil texture is better with sandy loam and loam. 2 Seedling 2.1 sowing time is generally in the "white dew" before and after 5 ~ 10d, that is, about mid-September sowing. 2.2 Variety Selection There are more than 40 kinds of mustard varieties. It is very important to choose the varieties that are resistant to disease, high yield, and high quality. At present, there are several varieties such as “Noisy No. 1â€, “Yifeng No. 1â€, and “Yongan Xiaoyeâ€. 2.3 Seedbed site selection Seed beds are suitable for fertile soils and flat sandy loam and loam. Site preparation of basal fertilizer, before sowing every common 667 square meters mustard special fertilizer 100 kg or soil miscellaneous fertilizer 1000 ~ 1500kg, seedling pod width 1.5 ~ 2m, sulcus width 30cm, ditch depth 20 ~ 25cm. 2.4 Seedbed Management Due to the high temperature and little rain during this season, we must pay attention to timely watering and drought relief. Fertilization at the seedling stage: When the third true leaves are applied, the first time seedlings are applied, and 2,000-2,500 kg of livestock and manure is applied to 4 to 5 kg of urea per 667 square meters. The fifth piece of true leaves was planted with the second time of Miao Fei, and 2,000-2,500kg of livestock and manure was applied to 5-6kg of urea per 667m2. 3 transplanting 3.1 Transplanting time General seedling period is 1 month, transplanted to Daejeon around mid-October. 3.2 The transplanting density is 2m, and the spacing is 0.4m, the spacing is 0.33m, 4500 to 5000 litters per 667m2 are planted, and the individual plants are planted. 4 Fertilizer and water mustard management is about 115 to 130 days in the growing season of the field. It is also an enlargement period of the tumor and requires a large amount of fertilizer. The principle of fertilization is to apply basic fertilizer and timely fertilizer. 4.1 Basic Fertilizer The special fertilizer for mustard 100kg per 667m2 is used for nesting, and is covered with fine soil. The vegetable seedlings are then planted on the other side to avoid direct contact between the roots and the fertilizer. 4.2 Appropriate top-dressing After 1 to 2 days after transplanting, “fixed root fertilizer†is applied, and 3,000 to 3,500 kg of livestock and manure is used per 667 square meters. 15-20 days after planting, the first top dressing is applied, and 3,000 to 3,500 kg of livestock and manure + 16 kg of urea per 667 square meters. 45 to 50 days after planting, the second top dressing was applied with 4500 to 5000 kg of livestock and manure + 18 kg of urea per 667 square meters. After 80 to 85 days after planting, the third topdressing is applied. Each 667 square meters uses 4000 to 4500 kg of livestock manure + 8 kg of urea. 5 Pest control Weed mustard is the most susceptible stage before 5 true leaves. At this time, it is the seedbed period. Therefore, the seedbed period is a crucial period for disease prevention. The main diseases of mustard are: blight, damping-off, brown spot, downy mildew, clubroot disease. The main use of "bactericide" (carbendazim, thiophanate, Jinggangmycin) control. When the first true leaf appeared, the first drug was applied, and then once every one week or so, it was applied one time before transplanting. Care should be taken that spraying should be done on a sunny day and that spraying should be thorough. Insect pests of mustard include locusts, green worms, cocoons, and yellow fleas, and they are mainly controlled by pesticides such as Leko cream, more chlorinated terpenes, and imidacloprid. Insect pests may occur during the whole growing period of mustard, which mainly damages the leaves and stems, affects the photosynthesis, and is also the medium for the spread of viral diseases. Therefore, it must be controlled in time. 6 Timely Harvest The following year, “Springâ€, the temperature rises rapidly, mustard grows quickly, if not timely harvest, it is easy to form a hollow head, bolting, seriously affecting its quality, generally collected before the “rainwaterâ€, In other words, the harvest will be harvested around mid-February of the following year and harvested at the end of February at the latest.