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作者着重研究了在营养液育苗条件下(与床土育苗比较)番茄幼苗生长和发育的规律及其变化。“无土苗”与“床土苗”相比,幼苗干重对数增长速度(Kw)分别为0.184及0.128,到第八片真叶展开期,“无土苗”总积温减少11％,育苗期缩短17％。在发芽期,“无土苗”根数多于“床土苗”,在基本营养生长期,前者根重高于后者,三叶展开期为试验品种花芽开始分化期,也是幼苗生长的转折点,幼苗相对生长速度及根重比值急骤下降,但“无土苗”恢复较快,且一直保持较高水平,两种苗在生长量上的差距从此显著拉开,育苗结束时,“无土苗”几乎成倍地高于“床土苗”。营养液育苗也显著地促进幼苗花芽分化的进程,花芽分化提前,花芽数增多。
The author focuses on the laws and changes of growth and development of tomato seedlings under nutrient solution incubation conditions (compared with bed soil incubation). The logarithmic growth rate (Kw) of seedlings was 0.184 and 0.128 for “soilless seedling” and “bed soil”, respectively. When the eighth true leaf was unfolded, the total accumulated temperature of “soilless seedlings” decreased by 11% Seedling shortened by 17%. At the germination stage, the number of “soilless seedlings” was more than that of “bed soil”. In the basic vegetative growth period, the former root weight was higher than that of the latter, and the three-leaf stage was the beginning of the differentiation stage of the flower buds of test varieties and also a turning point for seedling growth , The relative growth rate of seedlings and the ratio of root to root weight decreased sharply, but the recovery of “soilless seedlings” was rapid and maintained a high level. The gap between the two seedlings grew significantly from this point. At the end of nursery, Miao “almost doubled higher than” bed seedlings. " Nutrient solution seedling also significantly promote the process of seedling flower bud differentiation, flower bud differentiation in advance, the number of flower buds increased.