Fertilizer Absorption and Fertility Dynamics of Celery

(1) Root Absorption Characteristics: The main root of celery is well-developed, and when it is damaged, lateral roots grow rapidly in response. This makes transplanting seedlings an important practice to ensure strong root development. Most of the root system is concentrated in the top 20 cm of soil, classifying celery as a shallow-rooted vegetable. It thrives in loamy or clay-loam soils that are rich in organic matter (over 1.5%), have good water retention, and are fertile. The ideal pH range for growth is between 6 and 7.5, with salt content kept below 0.3% to avoid stress on the plant. (2) Nutrient Requirements: Throughout its growth cycle, celery absorbs nutrients in line with its increasing biomass. The absorption pattern of all essential nutrients follows an "S" curve, indicating a gradual increase followed by a plateau. In autumn-grown celery, the nutrient uptake period is particularly significant, with the peak absorption occurring between 68 to 100 days after sowing. During this time, more than 84% of the total nutrient uptake occurs, with calcium and potassium reaching as high as 98.1% and 90.7%, respectively. Among the nutrients, nitrogen is required in the highest amount, followed by calcium and potassium, while phosphorus and magnesium are needed in smaller quantities. The typical nutrient ratio of nitrogen, phosphorus, potassium, calcium, and magnesium is approximately 9.1:1.3:5.0:7.0:1.0. For every 1,000 kg of celery produced, the plant takes up about 2.0 kg of nitrogen, 0.93 kg of phosphorus, and 3.88 kg of potassium. Proper fertilization during the critical growth stages is essential to support healthy development and high yield.

Single Use Insufflation Needles

Disposable laparoscopic Veress Needle is a medical device used in laparoscopic surgery to generate pneumoperitoneum, the space created by introducing gas into the abdominal cavity. This space allows surgeons to operate with better visibility and access to internal organs. A Veress needle is inserted through a small incision in the abdomen and is used to inject gas into the abdominal cavity. The disposable version of the Veress needle is designed for single use and is discarded after each procedure to prevent the risk of infection. It is made of high-quality stainless steel and designed to be safe, efficient and easy to use. Disposable laparoscopic Veress needles are commonly used in laparoscopic procedures in hospitals and surgical centers.

Single Use Insufflation Needles,Laparoscopic Surgical Instruments,Sterile Laparoscopic Surgical Instruments,Disposable Veress Needle For Medical Surgery

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