| In this text,the Aesculus Chinensis seeds are the trial material , and by way of sprouting indoor , sowing in hothouse and plowland, researched on the seed form, sprouting physiology and the influence factors to the property of the seeds and seedling and the system is overall and systematic .Result shows:The seed possesses unique physics character. and it is the starch type. Water content is more than 60% .The seed is large-scale . The average diameter reaches 3.2cm, and the seeds are greatly different from each other ,and the average diameter of the biggest seeds is 3 times bigger than the smallest , and this leads to the difference of the ability of the seed sprouting and the property of the seedling . In the course of the layer under low temperature , the content of thesugar goes on increasing , and the content of protein, starch and fat reduces slowly .After the embryo finishes after-ripening and dormancy is removed ,the protein content increases slowly ,the content of starch falls slowly , the content of fat falls greatly and total sugar content increases, and it shows that the seed enters sprouting stage. The dormancy of the seed is caused by many factors . One is that the embryo does not ripe completely, and the second is machinery hindrance of the seed skin. Therefore it belongs to the compound type of the dormancy. For breaking the dormancy of the seed caused by internal cause, the best method is to cover the seed in the sand out of the house for 2 - 3 months , that is the stage of after-ripening of the embryo and shallow physiology dormancy , as a result , the seed has possessed the stronger ability ofsprouting .In order to break the dormancy caused by the external cause, the physics means can be used .For example : Soak the seed or cuts the seed skin etc. The synthesis character of the seeds sprouting is medium , and this is decided by its unique physics property . The seed rank has something with the seed vigour . The vigour of big seeds and the middle are stronger , and small seeds are weaker . When the average diameter of the seed smaller than 2cm , the vigour of seed will suffer the serious influence .The ability of sprouting of the seed can be influenced seriously by the seed rank , and the sprouting ability of middle seed is the strongest , and it shows that the rate of germination is higher ,and the time is short ,and the big seed takes longer time . When the average diameter is smaller than 2cm , the sprouting ability of the seed decreases obviously. At the same time ,the ability of sprouting of the seed can also be influenced by the different stratifications , and the conclusion is that the ability of sprouting of the seed stratificated outdoor under low temperature is better than layered in refrigerator , the ability of sprouting of the seed that layered in refrigerateor better than that layered indoor in the warm space, and the seed placed indoor will completely lose the ability of sprouting because that the seed loses water seriously in shorter than one month.Thinks over the factors such as the seeding weight , the stem width , the leaf color and shape and the proportion of the length of root and stem etc ,We think that the character of the seedling is medium. The seedling's character has something with the seed rank , and of those middle seeds sprout are the best , because they grow faster than the others which were sowed at the same time , and the ability of resisting nature is stronger ,and the character of seeding of small seed is a little bad.Sowing at different time and places have different influence to the seedling character . Sowing in spring is better than that in autumn , and the sowing in outdoor is better than that in the hothouse . So during the course of production , the best method is to sow outdoor in spring。 In addition , the seedling character can also be improved by radicle cutting , and it has notable effect on stronging seedling. In order to get the best effect , suggest... |
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