The planting technology and conditions, the number of years and the mining time directly affect the efficacy of Trifolium.

Sanye Qing prefers yin to yang, can withstand drought and should not be watered more, the suitable temperature for growth is about 25 ℃, and the soil is rich in humus. Propagation methods include seed propagation and cutting propagation, pay attention to row spacing, artificial loosening of soil after survival, proper fertilization, pruning in winter, strong disease resistance and less insect pests, but we should also pay attention to the prevention and control of mildew.

Climatic conditions of planting three-leaf green

Three-leaf green likes cool climate, so it is suitable for planting in spring and autumn. The suitable temperature for growth is about 25 ℃, but the growth is stagnant when the temperature drops to 10 ℃ in winter. This temperature is not suitable for the growth of clover green. The planting of three-leaf green does not need much water and is resistant to drought, so there is no need to water it more.

Soil conditions for planting three-leaf green

Sanye Qing is not strict with the soil, as long as it is planted on a soil rich in humus or calcareous. Three-leaf green is very good to grow, can resist disease and few insect pests, the most important thing is that it has strong negative tolerance and cold resistance, and its plasticity is very strong. If you want the survival rate, coverage rate and growth rate of three-leaf green can be planted in a wet outdoor environment.

Breeding technology

The simplest way of propagation is seed propagation, but it is generally planted by cutting propagation. Cuttings are carried out in spring and summer, but the best season for cutting propagation is spring. First of all, you need to select a strong branch, cut it into cuttings about the length of 14cm, and insert 2/3 of the length of the branch diagonally into the seedbed, then press and water it to keep it moist.

After waiting for about 30 to 40 days after insertion, the roots of the three leaves can be planted at that time. Planting according to the row spacing of 100 × 100 cm, planting 2-3 plants per hole, pressing, pouring enough root water and sprinkling with proper calcium magnesium phosphate fertilizer and plant ash, so that clover green can grow steadily.

Field management

The main results are as follows: 1. After the survival of planted clover, artificial weeding and loosening soil can be carried out, and a small amount of compound fertilizer can be applied to promote seedlings. In order to ensure the efficacy of clover, herbicides are prohibited during growth and chemical fertilizers are used as little as possible. When the three-leaf vine grows to 35cm to 40cm, it is necessary to set up a frame to guide the vine of the clover to climb.

2. Clover is mainly fertilized with human feces and urine or chemical fertilizer in spring and summer, while annular ditches can be opened for compost or stable manure in autumn and winter. The clover is ploughed and weeded 3 or 4 times a year, and the weak branches and dead branches should be cut off properly in winter.

3. Sanyeqing has strong disease resistance and basically no disease. the main disease is mildew, and there are black dots on the leaves as harmful leaves. The way to prevent it is to use 65% Daimen zinc 55% 600 times solution or Bordeaux solution or spray tophan 150 solution or spray topzine, and pay attention to drainage and ventilation.

4. Three-leaf green likes yin rather than yang. If the sun shines directly for a long time, three-leaf green will not survive. Therefore, in late spring, summer, early autumn should be appropriate to block about 60% of the sun, in case clover can not survive. However, clover needs higher illumination in post-autumn, winter and early spring, which can make clover roots grow up and increase the yield of clover. Controlling light intensity, timely harvesting, reasonable fertilization and adjusting humidity play a key role in improving the yield of clover green root, and can improve the quality of clover to achieve the best efficacy.

5. the medicinal value of clover depends on the growth years and mining time. When the color of the vine is brown, you can dig and observe the color of the root tuber. If the skin color of the root is golden or brown, it means that clover green has entered the mature stage.

The best picking period is from the Winter Solstice to hibernation every year, which belongs to the dormancy period of Sanye Qing. At this time, the quality of picked Sanye Qing is the best, the starch content is as high as 70%, and the efficacy is better.