为选择适宜的保水剂的添加量对育亩块成型效果及对幼苗质量的影响.以碧龙一号黄瓜为供试作物,研究了不同浓度的保水剂对育苗块育苗效果的影响.试验结果表明:保水剂的添加与育苗块的成型效果、湿容重、通气空隙度呈负相关.黄瓜育苗试验表明:随保水剂用量的增加,黄瓜幼苗的G值,根冠比都有先增加后降低的趋势.其原因是保水剂含量过多会影响基质通气,对出苗和生长不利.草炭与保水剂体积比为200:2的处理不但具有较好的育苗块成型效果,且能够保证幼苗质量.
Using the NO. 1 Bilong cucumber seedling as the reaserching seedling,we investigate the effect of different concentration of imbibant on characteristics of nursery block. The result indicated that :the forming effect,wet bulk density and the ventilation porosity of the nursery block were negative correlation with the addment of imbibant. The experiment of cucumber seedling indicated :with the increasing of the imbibant,the quantity and the ratio of cucumber seedlings were al2 so influenced,after the first increase in the trend of lower. The reason was that too much imbibant will affect the matrix ventilation of the emergence and growth. If the volume ratio of peat and imbibant was 200∶2,it will not only has good nursery block molding effects,but also can guarantee the quality of seedlings.
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