不同供水条件对小南瓜产量及根系发育的影响

Effects of different water supply conditions on yield and root development of pumpkins

以小南瓜为试验材料,采用盆栽的方法研究了5种供水条件:贫水年型(对照)、平水年型、丰水年型、贫补年型和平补年型(在贫水年和平水年中于小南瓜开花伸蔓期和果实膨大期补水,每次10mm)对小南瓜产量、水分利用效率和根系发育的影响。结果表明:平补年型小南瓜产量最高,达到了19604.5kg/hm2,水分利用效率达到64.76kg/(mm·hm2);整根总根长、直径小于1mm的根长、总根表面积、总根体积均高于对照;根系干质量最大,为799g,冠质量最大,为441.60g,根冠比为1.81%。因此,平水年适期补水是最适合小南瓜生长的供水条件。

The trial adopted the potted method with the pumpkin as experimental material and studied the effects of five water supply conditions:dry year style(control),normal year style,wet year style,dry and make-up water year style, normal and make-up water year style(supplying water at flowering and vine elongation and fruit expanding process of pumpkins during dry year and normal year,once 10mm)on yields,water use efficiency and root development of pumpkins.Results showed that in the treatment of normal and make-up water year style,the pumpkin yield was the highest,to 19604.5kg/hm2,the water use efficiency reached 64.76 kg/(mm·hm 2);the total root length,root length less than 1 mm,the total surface area and the total volume increased than the control;root dry weight was the largest,which reached 7.99 g,above-ground dry weight reached 441.60 g,root-shoot ratio reached 1.81%.So to supplement adequate water in normal year style was the best water supply for the growth and quality of pumpkins.