How to choose the spring seeds, the following describes several methods:
The cold water bath puts the seed into clear water, the full seed particles sink, and the seeds, sick seeds, and sclerotia float in the water. Just to remove the floating seeds to achieve the purpose of selection.
Hot water bath Rice seeds are usually soaked in hot water at 50°C to 54°C for 10 minutes; skin thick cotton seeds are soaked in hot water at 50°C to 60°C for 30 minutes.
The salt bath puts the seeds into the brine, which uses the characteristic of a large salinity to force the inferior species to surface.
The medicine bath is added with trisodium phosphate, sodium hydroxide, potassium permanganate and other drugs in the water, which can play a role in selecting seeds and kill bacteria.
Hormone bath soaked with solutions such as methiazin, paclobutrazol, and chlormequat can make young seedlings robust and fully emerged.
In addition, seed coating with a coating agent will not only increase the resistance of the seed, but also promote seed fattening.