1. Temperature

When the ground temperature reaches above 5℃ in spring, the absorption effect of the mulberry root system begins to increase. When it reaches above 10℃, new roots begin to appear. As the temperature continues to rise, the root stretching and absorptive capabilities increase, and the optimal temperature is 28 to 30°C.

2. Light

Mulberry trees are positive tree species and can grow normally only when there is sufficient sunlight. If the illumination is between 500 and 30,000 lux, photosynthesis will increase as the illumination increases. When it is greater than 30,000 lux, it will no longer increase. This is called light saturation.

3. Water

Water is an important component of the mulberry tree. The moisture content of mulberry leaves is generally 70% to 80%, that of branches is 58% to 61%, and that of roots is 54% to 60%. When the soil moisture is insufficient and the water absorption of the roots is reduced, the leaf stomata are closed to reduce transpiration to temporarily maintain the water balance.

4. Soil

Soil texture, thickness, structure, groundwater level and soil pH all directly affect the growth, yield and quality of mulberry trees. Mulberry trees are highly adaptable and can grow on a variety of soils, but loam and sandy loam are the best, requiring a deep soil layer, at least 1 meter below.

5. PH value

PH value adaptation range: 4.5-9 can grow, but near-neutral soil with a PH value of 6.5-7.5 is better. It can also be cultivated in lightly saline-alkali soil with a salt content of less than 0.2%.