CATDOLL : CATDOLL: How long does it take from planting mulberry trees to using them for silkworm breeding (How long does it take from planting mulberry trees to harvesting them for silkworm breeding)

1. What is the growth cycle of silkworm seedlings?

The growth cycle of mulberry seedlings is usually 3-4 months. The sowing time of mulberry seeds is usually from mid-to-late April to early May. June is mainly the planting time, and July to September is mainly the vigorous growth period of the plant. The greenhouse can keep warm and moist, and the greenhouse floating board seedling method can reduce the impact of temperature changes. The sowing time in the greenhouse is early March, and the seedlings can be planted in the field in April after raising them. The vigorous growth period of the plant can be extended to 4 months.

2. How many years does it take to start raising silkworms on one acre of newly planted mulberry trees?

One mu of mature mulberry forest can raise silkworms for 2-4 seasons a year, raising 4-6 cocoons, each of which can produce about 50 kg of fresh cocoons. Based on the average market price of 40 yuan per kilogram this year, the output value per mu is 4×50×40=8,000 yuan, with costs of 200 yuan for silkworm seeds and 100 yuan for disinfectants, a total of 300 yuan. Mulberry gardens can be used comprehensively, such as raising chickens and intercropping peanuts to increase economic income.

3. How long does it take to plant mulberry trees before silkworms can be raised?

How long does it take to raise silkworms after mulberry trees are planted?

Generally, you can raise silkworms in mulberry trees in the second year after planting. Because the mulberry seedlings are not very lush, you should raise fewer silkworms to prevent a shortage of mulberry leaves. For example, you can raise silkworms at a density of half or one-third of a acre of mulberry seedlings.

4. How long does it take to raise silkworms after planting mulberry trees?

Silkworms can be raised 2 years after mulberry seedlings are planted.

The planting time of mulberry seedlings is mainly concentrated in winter and early spring, and they are generally planted in spring. It is understood that the new mulberry seedlings can bear fruit in April-June of the second year after grafting. If you want to raise silkworms, as long as the mulberry seedlings have leaves, they can basically be picked to feed the silkworms. Therefore, after the mulberry seedlings are planted, silkworms can be raised in the second year.

5. How long does it take to grow mulberry leaves?

Generally speaking, the juvenile stage of mulberry trees is from the germination of mulberry seeds, the formation of seedlings and planting to the stage before flowering and fruiting. In terms of time, it takes about 2 to 3 years. If it is planted with seeds, the juvenile stage will be slightly longer, and it may take 3 years. If it is transplanted by grafting, as long as the growth is good, it will generally bloom and bear fruit in April or May of the second year. Therefore, the juvenile stage of grafted mulberry seedlings is only about 2 years.

The young age of mulberry trees can also be called the sapling stage. The main characteristics of this stage are that they grow very fast, the branches have a particularly strong rooting ability, and are easy to root after cuttings. Generally speaking, they will not bloom and bear fruit at this stage. In addition, the leaves of mulberry trees are relatively thin, the leaf shape is relatively large, there are many hairs on them, they are shade-tolerant, and the leaves fall later than adult mulberry trees.

2. Mulberry Tree Adulthood

The period from when the mulberry tree blooms and bears fruit for the first time until the yield drops for the first time is called the adult period or maturity period of the mulberry tree. Some people also call it the tree growth period, but they all mean the same thing. This stage lasts about 10 to 20 years. Of course, the duration of the adult period of mulberry trees varies for different varieties, planting conditions and planting environments. Some low-stem mulberry trees have a maturity period of only 5 years, while the adult period of high-stem mulberry trees can reach more than 20 years. Of course, through reasonable and scientific cultivation and management, the maturity period of mulberry trees can be appropriately extended.

The main feature of the mature stage of mulberry trees is that they begin to bloom and bear fruit in large quantities, and their growth rate will decrease. However, during the mature stage, mulberry trees are more resistant to adversity, wounds heal easily, and new branches sprout quickly even after being cut down. This stage is a stage of high yield and quality of mulberry trees. Especially for mulberry trees used for silkworm breeding, it is the best time for farmers to increase the number of spring silkworms and to obtain more benefits. Because the mesophyll of mulberry trees is thicker at this time, the fluff on the leaves is less, and the leaves grow larger, it is the stage with the highest leaf yield per unit area.

3. Mulberry Tree Old Age

The old age of mulberry trees is also called the senescence period, which refers to the stage after the first decline in leaf production after the prime age. Generally speaking, mulberry trees will enter the senescence period about 15 to 20 years after they are planted and cultivated. This is the decline of the life cycle of artificially cultivated mulberry trees, which is completely different from the wild mulberry trees that can grow for dozens or hundreds of years. Because cultivated mulberry trees need to be stable at a high-yield and high-quality level in order to obtain more leaf production. When the yield of mulberry leaves drops significantly, mulberry farmers should consider upgrading.

The characteristics of the aging period of mulberry trees are a significant decline in growth, a significant decrease in the yield of mulberry leaves, poor stress resistance, and the easy occurrence of dead branches, diseased branches and weak branches. Mulberry leaves are relatively small, the mesophyll is relatively thin, and they are easy to harden and turn yellow. Another typical feature is that there are often fewer fruits after flowering, or even no fruits. Once this happens, it means that the mulberry tree has completely entered the aging period. For farmers who grow silkworms and mulberry trees, they must consider transformation and replacement.