Specification:
Package
Inner packing: bubble package,cloth bag, white or color craft carton
Outer packing: kraft carton
Can be designed by customer
Plating thickness
Shipping terms
Delivery time
Square Brass Spout,Home Depot Tub Faucet Parts,Classic Square Brass Spout,Brass Square Faucet Spout KaiPing HuiPu Shower Metalwork Industrial CO,LTD , https://www.hp-shower.com
Name
Brass bath spout chrome plated Square design water saving spout
Material
Brass, Chrome
Function
Cold and hot water mixing
Usage
Bathroom equipment
Guarantee
5 years
MOQ
50 pieces
The chromium layer is 0.25-0.45 μm, nickel layer is 7.5-9.5 μm
FOB Guangzhou or EX-Work
15-30 days after receiving deposit.
Payment
T/T
Nutritional Characteristics and Fertilization Technology of Potato
Potatoes, also known as tubers, are high-starch crops that go through several growth stages: the seedling stage, tuber formation and growth period, and the starch accumulation phase. Throughout their entire growth cycle, potatoes absorb the most potassium fertilizer, followed by nitrogen and phosphorus. The nutrient requirements vary depending on the growth stage. During the seedling stage, since the tubers already contain sufficient nutrients, they require less external nutrients—about 25% of the total during this time. In the tuber formation and growth phase, both the above-ground stems and leaves, as well as the underground tubers, grow simultaneously, requiring more nutrients—approximately 50% of the total. Finally, during the starch accumulation period, the need for nutrients decreases again, accounting for about 25% of the total growth period. This shows that ensuring adequate nutrient supply during the tuber formation stage is crucial for increasing yield and starch content.
Potatoes are highly adaptable and can be grown across various regions in China. Their typical growth cycle lasts between 90 to 110 days. For every 1,000 kg of potatoes produced, approximately 3.5–5.5 kg of nitrogen, 2.0–2.2 kg of phosphorus (P₂O₅), and 10.6–12.0 kg of potassium (K₂O) are required. The ratio of N:P₂O₅:K₂O is around 4.5:2.1:11.3 or simplified to 1:0.5:2. If a farmer produces 1,500 kg per mu, the average absorption of nitrogen, phosphorus, and potassium should be about 7 kg, 3 kg, and 17 kg respectively. Nitrogen promotes the growth of stems and leaves and enhances the accumulation of starch and protein in the tubers. Phosphorus supports plant growth, improves tuber quality, and increases both starch content and yield. Potassium plays a key role in starch accumulation during the late growth stage, while also boosting disease resistance and cold tolerance. Additionally, potatoes are sensitive to boron and zinc. Boron helps in the expansion of tubers and prevents cracking, which significantly improves photosynthetic efficiency.
Fertilization techniques for potatoes should follow the principle of using mainly organic manure, supplemented with chemical fertilizers, with a focus on base fertilizer and appropriate topdressing. Base fertilizer should make up more than two-thirds of the total fertilizer used. It is primarily composed of well-decomposed farmyard manure, with some chemical fertilizers added, especially phosphorus and potassium. These help improve soil structure and support healthy growth. About 50% of the nitrogen should be included in the base fertilizer. The application method involves placing the fertilizer in furrows or holes before planting at a depth of around 15 cm. A typical rate might include 1,500 kg of organic fertilizer per mu, along with 20 kg of urea, 20–30 kg of calcium, 10–12 kg of potassium fertilizer, or 40–60 kg of high-nitrogen and high-potassium compound fertilizer. Fertilizer should be placed 2–3 cm away from the seed potato to avoid direct contact and then covered with soil.
Topdressing should be applied based on the plant's growth stage. During the seedling stage, applying nitrogen fertilizer (around 5–8 kg of urea per acre) combined with soil cultivation can help promote healthy growth. After flowering, it is generally not recommended to apply fertilizer directly to the rhizosphere, especially no additional nitrogen. Instead, phosphorus and potassium should be applied as foliar sprays. A solution of 0.3–0.5% potassium dihydrogen phosphate (50 kg per acre) is effective. If nitrogen deficiency is detected, 100–150 grams of urea can be added, sprayed once every 10–15 days, possibly up to 2–3 times. Since potatoes are sensitive to boron and zinc, if the soil lacks these micronutrients, spraying a 0.1–0.3% borax or zinc sulfate solution (50–70 kg per acre) can be beneficial. This should be done every 7 days, possibly twice. Farmers must remember that potatoes are potassium-loving plants, so balanced fertilization with sufficient potash is essential. However, excessive use of chlorine-containing fertilizers like potassium chloride should be avoided, as it may affect the quality of the tubers. Instead, potassium sulfate is preferred.