China has abundant wild pasture germplasm resources, but the low germination rate has caused many valuable wild pastures to be difficult to popularize and use. It is precisely for this reason that many germplasm and dormant characteristics of wild forage grasses that have valuable value are currently used. There is less research.

The germination and dormancy characteristics of seeds are one of the most important characteristics of the seeds. Only by understanding these characteristics can the seeds and plants be further developed and utilized. The experiment studied the germination and dormancy characteristics of four kinds of barnyard grass seeds (Matang, Hemaostachyum tangensis, Cleistogenes squarrosa and Cleistogenes squarrosa) using different treatments and germination conditions in an attempt to find out that the germination rate was low. The reason for this is to screen out the methods that can effectively increase the germination rate and the most suitable germination conditions for the test seeds. The study of the trial not only has a positive effect on the development and utilization of these four kinds of barnyardgrass, but also has positive significance for the collection and storage of wild forage germplasm resources and the development and utilization of wild plant seeds and plants.

Seed germination test equipment is an indispensable equipment for seed processing plants, seed testing stations and seed research units. The general seed germination room has three major elements: temperature, humidity, and illuminance, to meet the requirements of seed germination, and to implement automatic control, while having a bactericidal function.

According to the test requirements for seed seedling emergence rate, the seed production and marketing organization must have an inspection room and necessary inspection equipment that can meet the inspection needs. Grass-roots seed production and marketing units require more than 3 seed germination rooms, light incubators or standard seed germination rooms to meet production needs.

In this experiment, four kinds of treatment methods including different temperatures, different concentrations of potassium nitrate, pre-cooling and potassium nitrate plus pre-cooling were used to conduct the germination test on the selected four kinds of alfalfa seeds. Each treatment was set up with 3 replicates, each repeating 50 seeds. All treatments were germinated on paper, and it was easier to test a small number of seeds than to perform experiments in an instrument such as a light incubator. Three layers of filter paper were placed in each petri dish, and the pre-chilled seeds were placed in a 4 to 6°C freezer for 7 days and then moved to the incubator. The number of germination days was counted from the time when they were moved into the incubator. The temperature is usually maintained at high temperature 8h, low temperature 16h. Germination test light conditions were 8h light + 16h dark. The supplemental evaporation solution added during germination is distilled water.

The experiment showed that the most suitable germination temperature of the crabgrass was 30°C. The optimum germination temperature for the blood stasis, crabgrass, Cryptosporidium and Cleistogenes squarrosa was 20～30°C. The germination rate of the crabgrass and the two species of Cryptosporium The low level is due to the low seed viability, rather than the dormant problem. A certain concentration of KNO3 treatment can significantly improve the viability and germination rate of the seeds of the two species. The germination rate of the two species is affected by the seed viability and dormancy at the same time. The effects of pre-cooling and KNO3 treatment have significant effects on promoting their germination. According to the results of this experiment, the suitable germination conditions for the four seed germination tests are recommended to be treated with KNO3 (0.2%) or directly at a constant temperature of 30°C; the hemostatic matnuts, the cryptozoa and the rough Cryptosporidium was treated with KNO3 (0.2%) and pre-cooled (7d) and then germinated by incubating at 20-30°C. The last counting time was 12d, 12d, 17d and 19d respectively.

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