1、 Function

1. After breeding for more than a year, the fleshy roots begin to dry up, and there may be lignification. The stems turn brown and feel hard. It is also a normal situation, not black rot. The process of lignification is that the lignin produced in the cell is gradually depositing. After lignification, the stem and root will be more robust, which can ensure that they will not be broken and can support the heavier upper part

2. After lignification, the cell wall will not be elastic, and the cells inside will not absorb water and become expanded, which will avoid excessive growth in the later stage

2、 Acceleration method

1. More sunshine: there are many advantages for the fleshy roots to become lignified, which can be conducive to the formation of old piles. In order to promote the lignification of roots as soon as possible, more sunshine is needed to ensure good sunshine. It is difficult for the fleshy roots without sunshine to form lignification. However, summer is special, and the intensity of the sun is high, so you can't be exposed to the sun

2. Reduce nitrogen fertilizer: it is necessary to apply fertilizer reasonably during growth. If the soil is rich in nitrogen, it will affect the synthesis of lignin. Therefore, in order to promote root lignification as soon as possible, it is necessary to reduce the application of nitrogen fertilizer