Eggplant is a kind of deep-rooted vegetable. The main root groups are distributed in the soil layer of about 30cm, and it has a strong ability to absorb water and nutrients.

Eggplant is a fertilizer-loving crop, and soil conditions and fertilization levels have great influence on the fruit setting rate of eggplant. When the nutritional conditions are good,

There are few fallen flowers, malnutrition will increase the number of short flowers, and the flower organs are underdeveloped, which is not suitable for fruit setting.

In addition, the nutritional status also affects the flowering position. When the nutrition is sufficient, the branches in the flowering position can spread 4-5 leaves.

When malnutrition occurs, there are fewer leaves and more fallen flowers.

Experimental studies in various places showed that nitrogen (N) 2,7 ~ 3,0 kg and phosphorus (P2O5)0 were needed per 1000kg of eggplant fruit. 7~ 1, 0 kg,

Potassium (K2O)3, 7 ~ 5 and 6 kg, the ratio is 1∶0. 8∶ 1, 4, the absorption of nutrients at seedling stage is not large, but the absorption of nitrogen, phosphorus,

The absorption of potassium only accounts for 0.5% of its total absorption. 055%、0。 07%、0。 09%, but it is very sensitive to nutrient abundance and deficiency.

The nutrient uptake increased gradually from seedling stage to flowering and fruiting stage, and the nutrient uptake accounted for more than 90% of the total absorption from full fruit stage to final fruit stage.

Among them, the full fruit period accounts for about 2/3, which is the period when eggplant needs nutrition most in its life.