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1. Seed selection: Select the neatly shaped, full-filled seeds, remove the seeds, malformed seeds and other impurities.
2, soaking seeds: the seeds in the water temperature of 20 ~ 30 degrees Celsius, soak 2 ~ 4 hours, remove and use a clean cloth or towel to remove the seed coat of viscous material, cast with clean water, and then use a clean cloth Or wipe the water on the seed surface with a towel, and after it has dried, it can be broken.
3, broken shell: seedless watermelon seeds must be broken shell before germination, not broken shell seeds germination rate of only 20 to 30%, after shelling can be increased to 85%. The specific method is: Generally, buds are used to break the seed from the umbilical suture with teeth, and as soon as a click is heard, one third of the length of the seed can be opened, and excessive force cannot be used to damage the embryo. And it affects germination. You can also use pliers to gently open the seed tip, afraid that the bad seeds will be clipped. According to the size of the seed hole, a small wooden block and other hard objects can be fixed at the opening of the pliers. This can be done quickly and easily.
4. Pregermination: The germination temperature of seedless watermelon seeds is higher than that of ordinary watermelon seeds, and the optimum temperature is 30~35 degrees Celsius. Now two germination methods are introduced.
1) Cloth priming method: Place the seeds after shelling on a wet wrung cloth (preferably with a coarse cloth or a towel), stack the cloth around, and slowly roll it from the end into a roll. The seeds are separated one by one to increase the air permeability. The cloth rolls are germinated at a constant temperature of 33-35 degrees Celsius. After approximately 24 hours, the shoots are 0.3-0.5 cm long and placed in a cool place (not to be frozen.) ), The remaining germination continued, and after 12 hours, germinating seeds basically germinated.
2) Sand bed accelerating method: Firstly, prepare clean river sand, and use humidity to squeeze the finger tightly without water, and mix the good seed with equal volume of river sand and put it in the box, place it at 30~33 degrees Celsius. Germination within the temperature. To maintain a certain humidity, wet sand should be supplied in succession. Seeds are separated from each other, do not overlap, and do not pile up, improve the ventilation conditions, and prevent the occurrence of mold on the seed surface. During the germination process, water is not splashed, and germination usually starts at 16 hours, and reaches the peak at 24 to 36 hours.
5, the issue of germination attention
1) The standard length of germination bud length (radical root length) is 0.3 to 0.5 cm. If the length is too long, it is easy to cause damage and sowing is difficult.
2) After the germination of the seeds, in case of rainy days, no sowing can be done. Wet sand can be used to inhibit growth at about 15 degrees Celsius at room temperature.
The laser range finder components is characterized by an above-average measured value output frequency, up to 8hz. The miniature laser distance module is also suitable for monitoring defined distance and height during transport.
Seedless watermelon seed germination technology
There are three key technologies for planting seedless watermelon, one is germination, the other is seedling management, and the third is watermelon. If these three technologies are mastered, planting a seedless watermelon is easy. Seedless watermelon seeds due to incomplete embryo development, seed coat thicker reasons, the use of conventional soaking germination rate is low, and because seedless watermelon seeds must be germinated before sowing or seedlings, therefore, should be as follows to increase the germination rate .