Kidney beans have specific nutrient requirements throughout their growth cycle. They tend to absorb more nitrogen and potassium, while their demand for phosphate is relatively lower. However, a deficiency in phosphorus can negatively impact flowering, pod setting, and seed development, leading to reduced yields. Potassium plays a crucial role in the overall growth and productivity of kidney beans. Additionally, trace elements such as boron and molybdenum are essential for promoting plant growth and enhancing the activity of rhizobia, which help in nitrogen fixation. Applying ammonium molybdate in appropriate amounts can significantly improve both yield and quality. Dwarf kidney beans have a shorter growth period and enter a rapid growth phase during flowering. Therefore, it's advisable to apply top-dressing fertilizer early to support early development and increase flower production. On the other hand, cultivated kidney beans grow more slowly, and their peak nutrient uptake begins later, mainly during the pod elongation stage. They also require significant nitrogen during the later growth stages. To prevent premature aging and extend the fruiting period, timely top-dressing is necessary to boost yield. In terms of fertilization technology, for medium fertility soils, the recommended total fertilizer application per mu (approximately 667 square meters) is 2500–3000 kg of farmyard manure or 350–400 kg of commercial organic fertilizer. In addition, 8–10 kg of nitrogen, 5–6 kg of phosphate, and 9–11 kg of potassium should be applied. Nitrogen and potassium are usually split into basal and top-dressing applications, while phosphate is applied as a base fertilizer. It’s best to mix the organic fertilizer with chemical fertilizers before application. For the basal fertilizer, apply 2500–3000 kg of farmyard manure or 350–400 kg of commercial organic fertilizer, along with 3–4 kg of urea, 11–13 kg of diammonium phosphate, and 6–8 kg of potassium sulfate. For top-dressing, apply 6–9 kg of urea and 4–6 kg of potassium sulfate during the early growth stage. During flowering and pod formation, apply 5–7 kg of urea and 4–6 kg of potassium sulfate. Foliar sprays of 0.3%–0.4% potassium dihydrogen phosphate or micronutrient solutions should be applied 3–4 times at intervals of 7–10 days. In greenhouse or controlled environment cultivation, carbon dioxide enrichment can further enhance plant growth and productivity.

Nutrient supplements

What is Nutrient supplements?

Nutritional supplements are preparations used to supplement nutrients that may be lacking in the body's daily diet. These formulations may be single or a combination of multiple nutrients, including but not limited to the following ingredients:
- Protein (e.g. protein powder)
- Fish oil (contains omega-3 fatty acids such as DHA)
- Various vitamins (such as vitamin A, B vitamins, vitamin C, vitamin D, vitamin E, etc.)
- Minerals (e.g. calcium, iron, zinc, selenium, etc.)
- Dietary fiber
- Other specific nutrients, such as Amino Acids, enzymes, probiotics, plant extracts, etc
The purpose of nutritional supplements is to meet the nutritional deficiencies that individuals may have due to special needs, dietary habits, digestive and absorption problems, health conditions (such as disease, pregnancy, aging, etc.) or other reasons. They are usually available in the form of tablets, capsules, oral liquids, powders, etc.
When choosing a nutritional supplement, one should consider an individual's physical condition, diet, and possible side effects. Although nutritional supplements can provide additional nutrients, it does not mean that they are a substitute for a balanced diet. The best strategy is usually to get most of your nutrients through a varied diet and use nutritional supplements when necessary under the guidance of a medical or professional. In addition, excessive consumption of certain nutritional supplements may also pose health risks, so it is recommended to consult a professional before use.

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