Understand how to cultivate edible fungi and the technology of formula fertilization for flowers.

The nutrient content of different kinds of flowers varies greatly. Chrysanthemum, poinsettia and carnation require more nutrients, while geraniums and roses need relatively less nutrients. Most flowers prefer nitrate nitrogen. The N:P:K required for normal growth and development of flowers is about 1RV 0.2 N:P:K, but there is a slight difference among different types of flowers. The suitable proportion of N:P:K for foliage flowers is 4RV 0.1VR 5.

Nutrient supply not only affects the growth and development of flowers, but also affects the color and ornamental value of flowers. Carbon, hydrogen, oxygen and nitrogen are the components of all kinds of chromogenic polymer compounds. if you change their supply, the color of flowers will change, such as too much nitrogen or increasing the supply of carbohydrates, the red color of flowers will fade. When nitrogen deficiency, blue autumn chrysanthemum is light blue or even white. Phosphorus and potassium can change the cool color of cool flowers to colder colors, and increase potassium to make the blue of blue flowers more colorful and bluer, and the flowers are not easy to fade. For red flowers with warm colors, the color of flowers is redder with the increase of potassium, and it is not easy to fade.

When flowers are deficient in iron and manganese, the red will fade and fade easily. When magnesium, molybdenum and uranium are insufficient, the cool colors of cool flowers will turn gray or white, and the colors will not be bright. If the yellow rose is sprayed with molybdenum and copper, its color is bright, and when magnesium fertilizer is applied to green flowers, the green is more bright.

Flower fertilizer must have complete nutrients, slow release and no peculiar smell, mainly organic fertilizer, timely topdressing, and the specific amount of fertilizer should be determined according to the type of flowers.