Formula fertilization is based on soil testing and fertilizer field trials. Based on the laws of crop manure requirements, soil fertility and fertilizer effects, based on the rational application of organic fertilizers, nitrogen, phosphorus, potassium, and trace elements and other fertilizers are proposed. Application amount, fertilization period and application method. In layman's terms, it is the scientific application of formula fertilizer under the guidance of agricultural science and technology personnel. The core of soil testing and formula fertilization technology is to regulate and solve the contradiction between crop demand fertilizer and soil fertilizer supply. At the same time, we need to supplement the nutrient elements needed for crops. What elements will be added to crops will be supplemented with what elements, and how much it will need to be supplemented to achieve a balanced supply of nutrients to meet the needs of crops; and to increase the use of fertilizers and reduce the use of crops to increase crop productivity. Output, improve the quality of agricultural products, save labor, save money and increase revenue.
The fertilizer formulations of high-yielding cultivation of bitter gourd and loofah are mainly based on the nutrition characteristics of different varieties of bitter gourd and gourd at different growth stages, soil nutrient status, fertilizer supply and physical and chemical properties, climatic conditions, characteristics of fertilizer varieties, etc. Formula fertilization must also be closely combined with other agricultural technical measures such as farming, irrigation, and pest control to achieve good results. The formula fertilization of balsam pear and loofah lacks relevant experimental research.
With reference to the type of vegetable ingestion of soil nitrogen, bitter gourd is a type of high-nitrogen vegetable: 1000 kg of bitter gourd is produced, and on average, 5.277 kg of nitrogen, 1.761 kg of phosphorus, and 6.666 kg of potassium are extracted from the soil. When tested, bitter gourd yield levels were between 1500 and 2500 kg. Bitter gourd and loofah are all fruits, which is suitable for extra-root dressing in the young fruit period.
The requirements of fertilizer-free balsam pears and sponge gourds in protective facilities differ from those in open fields, mainly due to slower growth in the early stages and less need for fertilizer. With the advancement of the growing period, the growth rate is accelerated and the absorption intensity of nutrients is also increased. In the early stage of growth, the supply of soil nutrients is relatively large. With the birth process, the supply of nutrients gradually decreases, especially in the later period. Therefore, bitter gourd, loofah's absorption of nutrients and the contradiction between the supply of soil nutrients is more acute, such as the production of fertilization in accordance with open cultivation methods, often appear early prosperous, late defertilization and premature aging, resulting in reduced production.
The principle of fertilization in protected areas should be dominated by farmyard fertilizers and supplemented by chemical fertilizers; farmer's manure and phosphorus, potash fertilizers, and a small amount of nitrogenous fertilizers should be applied to the entire layer of urea. The remaining nitrogen fertilizers should be applied with water. The topdressing time is better from the initial stage of harvesting to the harvesting stage. The amount of topdressing should be light and heavy. There are conditions that can be used for farmyard manure or slow-acting fertilizers with large carbon and nitrogen ratios and adequate maturity. However, nitrogen fertilizer synergists should not be applied.
Convenient Bath Towel,Disposable Hotel Towels,Disposable Hotel Bath Wash Towel,Disposable Facial Face Towel
RFX+CARE Manufacturing Co.,Ltd. , https://www.rk-rfxcare.com