1. Cabbage Vegetables These vegetables include Chinese cabbage, big green vegetables, small green vegetables, black and white vegetables, rapeseed, etc. The edible organs are leaves. The production characteristics are large leaf area, large transpiration, but shallow roots. Therefore, high soil moisture content and fertile soil, ensuring adequate supply of nitrogen fertilizer throughout the growing season, is the key to high yield of Chinese cabbage. Phosphorus and potassium fertilizers should be sufficient in the later period. It is necessary to apply trace elements in a timely manner. Calculated by tons of Chinese cabbage, the absorption of nitrogen, phosphorus, and potassium is 0.8-2.6 kg of nitrogen, 0.8-1.2 kg of phosphorus pentoxide, 3.2-3.7 kg of potassium oxide, and the absorption ratio is 1:0.5:1.7. The requirements for trace elements are mainly iron, followed by calcium, zinc, boron, and manganese, and copper is the least. Foliar application of 0.25% ~ 0.5% calcium nitrate solution can significantly reduce the incidence of dry heartburn caused by calcium deficiency in Chinese cabbage.
2. Green leafy vegetables Such vegetables include spinach, lettuce, celery, spinach, leeks, garland chrysanthemum, and Yinxiang, etc. The edible part is mainly soft leaves, petiole or stem, the production is characterized by shallow roots, rapid growth, fertilizer Large demand. For celery, the absorption of nutrients is 2.55 kg of nitrogen, 1.36 kg of phosphorus pentoxide, and 3.67 kg of potassium oxide, and the absorption ratio is 1:0.5:1.4. Celery is a kind of high-potassium vegetable, potassium can promote the stout and full of the petiole, good luster, is conducive to increase production and improve quality, calcium deficiency can cause heart rot of celery; spinach is sensitive to copper deficiency, silver deficiency, lack of zinc; Lettuce is sensitive to zinc deficiency, copper deficiency and lack of molybdenum. Therefore, the application of multi-element micro-fertilizer to such vegetables has a certain increase in yield.
3. Solanaceous vegetables This type of vegetable has tomatoes, eggplants, sweet peppers, etc., edible organs are fruits, the growth characteristics are buds, edge flowering, edge results. Therefore, we must pay attention to the application of phosphorus and potassium fertilizers, and ensure the balanced supply of nitrogen, phosphorus and potassium nutrients, and pay attention to the application of trace elements such as calcium, iron, manganese and zinc. Tomato products are measured in tonnes. Nutrient uptake is 3.18 kg of nitrogen, 0.74 kg of phosphorus pentoxide and 4.38 kg of potassium oxide, and the absorption ratio is 1:0.5:1.5. Spraying 0.5% calcium oxide solution during fruit setting period can prevent and cure tomato umbilical rot, increase fruit firmness, and facilitate storage and transportation. Tomato is more sensitive to iron deficiency, manganese deficiency and zinc deficiency. It should be sprayed with multiple fertilizers as soon as possible, and it can prevent and treat diseases such as yellowing, spotted leaf and lobular diseases.
4. Melons Vegetables Such vegetables include cucumbers, squash, zucchini, wax gourds, loofahs, bitter melons, and chayotees. Edible organs are fruits. Pay attention to the application of phosphorus and potassium fertilizers in fertilization, and ensure the balanced supply of nitrogen, phosphorus and potassium nutrients, and pay attention to the application of trace elements such as manganese, copper and calcium. From the perspective of nutrient uptake, the nutrient uptake of cucumber is 4.1 kg of nitrogen, 2.3 kg of phosphorus pentoxide, and 5.5 kg of potassium oxide in terms of tons of product. The absorption ratio of cucumber is 1:0.6:1.3. Cucumber is more sensitive to manganese deficiency and copper deficiency. Early application of multiple micronutrients has a good effect on yield increase.
Greenhouse Film Manual Roll Up
The Greenhouse Film Electric Roll-Up Unit replacing traditional manual roll-up unit to reach high speed automation in revolving & releasing films and greenhouse environment, it is the new generation of greenhouse ventilation and temperature regulation facilities. Portability, output torque, output lock, wide range and precise adjustment, waterproof, dew-proof and power-saving are the key characteristics for Electric Roll-Up Unit, which is the best choice for modern daylight greenhouse applied in different climates.
Greenhouse Film Manual Roll Up,Greenhouse Manual Winch,Greenhouse Side Film Roll Up
JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.spgreenhouse.com