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首页> 外文会议>International Peat Congress; 20040606-11; Tampere(FI) >CHANGES IN PHYSICAL PROPERTIES OF PEAT-BASED SUBSTRATES AT DIFFERENT DEPTHS DURING CULTIVATION PERIOD OF GERBERA
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CHANGES IN PHYSICAL PROPERTIES OF PEAT-BASED SUBSTRATES AT DIFFERENT DEPTHS DURING CULTIVATION PERIOD OF GERBERA

机译：在非洲菊栽培期间不同深度的基于泥炭的基质的物理性质变化

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摘要

Gerbera was grown for 24 months in four growing media: white peat; sphagnum peat + perlite; brown peat; brown peat + calcined clay. The physical properties of the media were obtained from a 192,3 cc PVC sampling rings buried in growth cylinders at a distance of 2.5,10.0 and 17.5 cm from the bottom. Rings were removed after 1,3,6,12,18 and 24 months of cultivation. Total pore space generally decreased during the cultivation period. The lower total pore space was associated with decreased air volume or increase in water volume. Shrinkage value was generally increasing during the time of cultivation. Generally total porosity and air content at -10 cm H_2O was markedly lower in the bottom than in the upper layer of cylinder, while the opposite was observed for bulk density, shrinkage and water content at -10 cm H_2O. These differences increased in time and they were most apparent in brown peat and least apparent in sphagnum peat + perlite.
机译：非洲菊在四种生长介质中生长了24个月：白色泥炭；泥炭泥炭+珍珠岩;棕色泥炭棕色泥炭+煅烧粘土。介质的物理特性是通过将192,3 cc的PVC采样环埋入生长缸中而获得的，该采样环距底部2.5,10.0和17.5 cm。培养1、3、6、12、18和24个月后去除环。在培养期间，总孔隙空间通常减少。较低的总孔隙空间与空气量减少或水量增加有关。在培养期间，收缩值通常增加。通常，-10 cm H_2O的底部总孔隙率和空气含量明显低于圆柱体的上层，而-10 cm H_2O的堆积密度，收缩率和水含量却相反。这些差异随着时间的增加而增加，在褐色泥炭中最明显，而在泥炭泥炭+珍珠岩中最不明显。

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