水分对有机基质栽培番茄生长、生理特性和产量的影响

以番茄品种齐粉为试材,研究了基质相对含水量为(95±5)%、(80±5)%、(65±5)%和(50±5)%4个处理对有机基质栽培番茄生长、生理特性和产量的影响。结果表明,随着基质相对含水量的升高,有机基质栽培番茄的株高、茎粗、叶面积、节间长和产量均明显增加;番茄叶片的净光合速率、蒸腾速率、气孔导度都增大,而水分利用率下降。基质相对含水量为80%的处理与相对含水量为50%和65%的处理相比,番茄长势较好,蒸腾强度、光合强度和产量较高。基质相对含水量为95%的处理与80%的处理相比,产量未有显著增加,且植株有徒长现象,水分利用率低,水资源浪费严重。

The Effect of Water Content on Growth, Photosynthetic Characteristics and Yield of Tomato Grown in Organic Substrates

Qifen,a tomato variety,was used to study the effects of different water content on the growth,photosynthetic characteristics and yield of tomato grown in organic substrates.The experiment designed(95±5)%,(80±5)%,(65±5)%,(50±5)% four relative water content(RWC)treatments,three replicates.The results indicated that with RWC increasing ,the plant height,stem thickness,the length of nodes,leaf area and yield,the net photosynthesized rate,transpiration rate,stomatal conductance increased but water utility effici...