Plug seedling raising is a time-saving, trouble-saving, fast and high-quality seedling raising method. It is best to use a 50-hole seedling tray for melons, vegetables and eggplant, and tomato seedling is the simplest. Generally, the seeds produced by regular units are coated seeds, and 70 50-hole seedling trays per acre are enough. In addition, buy some substrates, only one seed is needed for each hole, which saves seeds. Plug seedling does not accelerate germination, transplant, produce insects or get sick.

Plug seedling raising is an inevitable process of planting industry development. With the continuous improvement of farmers' income level and quality of life requirements, saving time and effort has become a pursuit of people, and plug seedling just meets this requirement. We can see from several development stages of planting industry that:

1. The earliest planting was direct seeding. In order to ensure the emergence rate, people need more seeds, which will waste seeds and increase the labor force in the later stage, because if there are more seedlings, artificial thinning is needed. Waste manpower, financial resources and material resources

2. Raise your own seedlings. With the development of society, people began to raise seedlings by themselves. Generally, soil is used as their own seedbed, and seeds are sown on the seedbed, and when the seeds germinate to the height of 15-20 cm, large seedlings are selected for planting. In this way, the waste of seeds is avoided, but in many cases, because the soil carries bacteria, it is easy to infect crops at seedling stage, and the size of seedlings is irregular, so it is impossible to ensure unified management when planting in the field. When planting at the same time, pulling out seedlings will affect the root system.

3. Plug seedlings. Finally, we developed plug seedlings. Plug seedlings use substrates, so there is no pollution of soil diseases. At the same time, one hole can also prevent seed waste. Moreover, it is managed in the seedling factory in a unified way to ensure the same size of seedlings. After we plant them in the ground, we can manage them in a unified way. When planting, the root system is not affected, and it can quickly return to seedlings when planted in the ground. Solved all the disadvantages of traditional planting and seedling raising.

To sum up, plug seedling has great development prospects and is being popularized to all crops. But also developing towards industrialization and mechanization. With the acceleration and completion of land circulation in the future, the emergence of large farmers will further promote the development of plug seedling, which is in line with the process of agricultural modernization.