There are many iron-containing vegetables and fruits, among which vegetables include leek, shepherd's purse, celery, black fungus, spinach, amaranth, tomato, mushroom, cauliflower and cowpea. Fruits include cherries, strawberries, longan, mulberries, purple grapes, peaches, pineapples, red dates, kiwis and apples.

In addition to these vegetables and fruits, there are many foods containing iron, such as egg yolk and animal liver. People who need iron supplementation can appropriately increase the intake of these foods.

Growth habit of leek

1, temperature: Chinese chives are cool-loving, cold-resistant and heat-resistant. The optimum temperature for seed germination is above 12℃, the growth temperature is 15℃ to 25℃, and the underground part can withstand lower temperatures.

2, lighting: moderate light intensity, strong negative resistance. However, the light is too weak, the accumulation of photosynthetic products is less, the yield is low, and it is easy to premature aging; Too much light, too high temperature, too much fiber and poor quality.

3. Moisture: The suitable air relative humidity is 60-70%, and the soil humidity is 80-90% of the maximum field capacity.