There are many factors affecting seed germination, which can generally be divided into internal factors of seeds and external factors of seeds. Internal factors include the size of the seed, the quality of the seed, and the variety of the seed. External factors include sunlight, moisture, temperature, matrix and air. Seed internal factors According to the size of the seeds, they are divided into large grains, medium and large grains, small grains, and tiny grain seeds. 100 grams of seeds per gram are large-grained, such as: sunflower, canna, sweet peas, nasturtium, asparagus, silver edge jade, etc.; between 100-600 seeds per gram is medium and large, such as : zinnia, marigold, crape myrtle, geranium, string red, emperor chrysanthemum, aster, beauty sakura, carnation, etc.; between 600-2000 grains per gram seeds are of small size, such as: Celosia, African Impatiens Flowers, clover, gypsophila, chrysanthemum, pansy, primrose, etc.; more than 2000 grains per gram of seeds are fine seeds, such as: cineraria, pueraria, sinica, gloxinia, snapdragon , Petunia and so on. Seeds must be completely mature seeds and have germination conditions. The seed must have completed the dormancy period. Of course, seeds without a dormant period (eg, wheat seeds) were excluded. External factors of seeds Seeds have the characteristics of good light, closed light, and intermediate germination. The seeds of good light germination germinate on the surface of the medium and do not need to be covered, such as: Begonia squarrosa, Pueraria fragrans, Gloxinia, Primula, etc.; the seeds of light-closed germination are appropriately planted with the size of the seed, such as: sunflower, Celosia, colorful leaf, beautiful cherry, pansy, etc.; middle germinating seeds can be covered with or without covering media, such as: African Impatiens, Forget-me-nots, etc. Demand for seed moisture: generally good photosynthetic seeds because the seeds on the surface of the medium, if there is no high degree of moisture, the seeds often appear dry and difficult to germinate or not germinate, such as: cineraria, calamus, four seasons Begonia, gloxinia, etc.; seed germinating in a semi-humid environment is generally photopic germination, as the seeds in the medium, if excessively moist or rainy days, the natural evapotranspiration of the matrix weakens, resulting in matrix compaction, excessive moisture matrix The pores are reduced, resulting in poor germination and germination. According to the characteristics of seeds and temperature, they are divided into the types of germination in the warm, semi-warm and cool environment. The warm type is generally the best in the environment between 25-36°C. Such as: Zinnia, marigold, cockscomb, amaranth, Dali flowers, etc.; semi-warm type is generally the ideal temperature between 18-25 °C, such as: beautiful cherry, pansy, kale, gloxinia , African Impatiens, etc.; cool type is generally ideal between the temperature of 15-18 °C, if the temperature exceeds 18 °C it is difficult to germinate or germinate is not ideal, such as: ranunculus, Phlox, Primula, etc. . Sowing seedlings and the relationship between the substrate: If the matrix is ​​not disinfected or the matrix contains viral bacteria, it will make the seeds infested and unable to germinate, or the seeds will germinate and become brown and die due to the influence of virus bacteria. Sometimes the seedlings grow after germination. Slightly inappropriate management resulted in yellowing and death of seedlings. In particular, when the seed germinates with good light, although the seed has developed a bud, the young root can not enter the matrix in a timely manner, resulting in the death of seedlings, which is directly related to the content of the matrix lithograph and the organic matter content. Seed aerobic When the seeds start their activities, they need to breathe, and they need oxygen. Therefore, watering too much at the time of sowing will cause the seeds to rot, because of the lack of oxygen. Only a few seeds of aquatic plants can germinate under hypoxic conditions. Knowing the conditions of seed germination, we can control and regulate seed sowing and growth conditions to achieve good germination rate of seeds. Here we analyze the control of various factors affecting seed germination. The first step: The first is to use the ideal substrate for sowing and nursery. After disinfecting treatment, select the appropriate thickness of the substrate according to the size of the seed. The large-grained seeds use a rougher matrix. To increase the porosity, tiny seeds, and the bottom layer use a rougher matrix. A layer of fine substrate is laid on top; The second step, according to the seed size and seed light, closed light germination characteristics of sowing, water, light-closed seeds to be sprayed before sowing, tiny seeds cover the substrate can not see the degree of seed, large seeds can be slightly deeper a little. The seeds of good light, if they germinate quickly, are also sprayed first and then sowed. For seeds that are slow to germinate, the water content of the substrate is increased by the immersion method; The third step is the sowing environment or the venue. Opaque germinating seeds are not placed in a dark place, but are sown after covering the substrate, placed in a direct light and astigmatism environment according to the characteristics of the seed, the seeds of the photogenic germination are not placed in a strong Under the direct light, instead of covering the substrate after sowing, according to the characteristics of the seeds placed in the environment of astigmatism and shading, for the seeds of good light germination, because the seeds on the surface of the medium must be in a moist environment, otherwise Difficult to germinate or grow slowly after germination. Traction Roller,Converting Machine Roller,Oil Resistance Roller,Converting Machine Roll Taixing Jinlong Rubber Rollers Co., Ltd. , https://www.jinlongroller.com