Bean cakes (called rapeseed cakes in some places) can be bought in oil-pressing workshops and flower-and-bird markets, and then soaked in water for fermentation (the container should be covered, otherwise the odor will pollute the air). When it is fully decomposed and the odor is not strong, it can be used for flowers. Users can also directly mix a small amount of bean cake crumbs into the soil far from the roots, so that the fertility can be slowly released during watering.
Extended data:
Precautions:
1, weeding and loosening soil before fertilization. In the process of tree growth, many weeds grow at the same time, competing for nutrients with them. The soil surface will also be hardened. Therefore, weeds should be cleared before fertilization, and then the soil should be loosened, which is not only conducive to the infiltration of fertilizer and water into the soil, but also conducive to the reproduction of microorganisms, and can also promote the accelerated decomposition of organic fertilizers in the soil, provide plants with various elements, and make plants grow well.
2. Water after fertilization. Trees should be watered more after fertilization, otherwise, there will be more fertilizer and less water, and high temperature will be generated after fertilizer fermentation, and the roots will be burned. Therefore, after fertilization, trees must be drenched with clear water the next morning, commonly known as backwater, which is beneficial to the absorption of fertilizer and can avoid fertilizer damage.
3, fertilization must also master the weather. It is not suitable to fertilize around noon in rainy days and high temperature in summer. Because fertilization is easy to lose in rainy days, it is best to fertilize on cloudy days or in the evening after the soil is dry, and the effect is better.
Baidu encyclopedia-nitrogenous fertilizer
People's Network-How to Fertilize Chinese Herbal Plants (Agrochemical Service Square)