6. Melon

Melon has a shorter growth period and requires less fertilizer. For every 1,000 kg of melons produced, about 3.5 kg of nitrogen, 1.72 kg of phosphorus and 6.88 kg of potassium are needed. According to the fertilizer utilization rate, the ratio of the three elements in actual fertilization is 1:1:1.

7. Chili

Pepper is a vegetable that requires a lot of fertilizer. It requires 3.5-5.4 kg of nitrogen (N), 0.8-1.3 kg of phosphorus pentoxide (P2O5), and 5.5-7.2 kg of potassium oxide (K2O) for every 1,000 kg of production.

From the early stage of growth to the fruit harvest period, the amount of nutrients such as nitrogen, phosphorus, and potassium absorbed by peppers in different growth periods is also different: from emergence to budding, the plant has fewer roots and small leaves, and the nutrients needed are also different. Less, about 5% of the total absorption; from budding to first flower, the plant grows faster, the plant expands rapidly, and the nutrient absorption increases, accounting for about 11% of the total absorption;

From the first flower to the full flower, the result is the period of vigorous vegetative growth and reproductive growth of pepper, the absorption of nutrients accounts for about 34% of the total absorption, which is the period when the absorption of nitrogen is the most;

When the flowers are in full bloom to the maturity stage, the plant's vegetative growth is weak, and the nutrient absorption is about 50% of the total absorption. At this time, the requirements for phosphorus and potassium are the most; after the ripe fruit is harvested, in order to promote the growth and development of the branches and leaves in time, Sometimes a lot of nitrogen fertilizer is needed.

8, Big ginger

Every 1000 kg of fresh ginger needs to absorb 6.34 kg of pure nitrogen, 1.6 kg of phosphorus pentoxide, and 9.27 kg of potassium oxide. The order of nutrient uptake is potassium>nitrogen>phosphorus. There are two peaks in the demand for nutrients, the first is In the three-branched period, the second is the period of rhizome expansion after the beginning of autumn.

Fertilization principle: re-apply organic fertilizer for base fertilizer, combined with a certain amount of compound fertilizer, topdressing is mainly water-soluble fertilizer, and the ratio of nitrogen, phosphorus and potassium is reasonable.

9, Cabbage

To produce 5000 kg of Chinese cabbage per mu, it needs to absorb 11 kg of pure nitrogen (N), 54.7 kg of pure phosphorus (P2O5), and 12.5 kg of pure potassium (K2O) from the soil. The ratio of the three is 1:0.4:1.1. During the vegetative growth period of Chinese cabbage, sufficient oxygen nutrition has a particularly important role in promoting the formation of large green leaves and improving photosynthetic efficiency.

Because the growth rate and growth rate of Chinese cabbage in different growth periods are different, the requirements for nutritional conditions are also different.

The characteristics of the total fertilizer requirement are: less nutrients are absorbed in the seedling stage, and the absorption of nitrogen, phosphorus, and potassium is less than 10% of the total absorption; the rosette stage is significantly increased, about 30% of the total amount; the nutrient absorption is the most in the core period , About 60% of the total number of points.

10. Yam

For every 1,000 kg of tubers, 4.32 kg of pure nitrogen, 1.07 kg of phosphorus pentoxide, and 5.38 kg of potassium oxide are required. The ratio of nitrogen, phosphorus, and potassium required is 4:1:5. The amount and type of fertilizer required in different growth periods are different. same. Seedling stage: small plant growth. The absorption of nitrogen, phosphorus and potassium is also small.

The prosperous period of branches and leaves: As the growth rate of plants increases, the amount of growth increases, and the amount of nutrients and absorption also increase, especially the amount of nitrogen absorption. Tuber rapid swelling period: the growth of stems and leaves reaches a peak, tubers grow and swell rapidly, and the absorption of nitrogen, phosphorus, and potassium also reaches a peak.