不同灌水量对热带大棚滴灌甜瓜产量、品质及水分利用效率的影响.docVIP

不同灌水量对热带大棚滴灌甜瓜产量、品质及水分利用效率的影响 　　摘要：研究不同灌水量对甜瓜（Cucumis melo L.）产量、品质和水分利用效率的影响，为热带大棚甜瓜科学合理灌溉提供指导。以甜瓜品种南海蜜（C. melo cv. Nanhaimi）为材料，采用棚内20 cm蒸发皿水面蒸发量为参照估算灌水量方法，设置蒸发皿系数kcp分别为1.2（k1.2）、1.0（k1.0，CK）、0.8（k0.8）、0.6（k0.6） 4个处理，研究了不同灌水量对热带大棚甜瓜产量、品质及水分利用效率的影响。结果表明，灌溉水量较大的k1.2和k1.0处理其甜瓜地上部总干重显著大于其他处理。滴灌水量越大，甜瓜的果实纵径和横径以及单株产量则增加越明显，但k1.0和k1.2处理之间甜瓜单株的产量差异不显著。甜瓜果实可溶性糖、可溶性蛋白、维生素C、中心可溶性固形物的含量以及水分利用效率随着灌水量的增加呈下降趋势，k0.6处理含量最高，k1.2处理最低。综合考虑甜瓜的品质和产量，在热带设施条件下，利用蒸发皿系数1.0可以指导热带设施甜瓜的灌溉管理。 　　关键词：甜瓜（Cucumis melo L.）；热带地区；灌水量；产量；品质；水分利用效率 　　中图分类号：S652 文献标识码：A 文章编号：0439-8114（2015）24-6259-04 　　DOI：10.14088/j.cnki.issn0439-8114.2015.24.042 　　Abstract：To guide the（Cucumis melo L.） scientific and reasonable melon irrigation， the effects of different irrigation amount on yield， quality and water use efficiency of drip-irrigated melon in tropical greenhouse were studied. The cultivar used in the experiments was C. melo cv. Nanhaimi. Using water surface evaporation of 20 cm（relative diameter） of evaporation dish to calculate the amount of irrigation water， four treatments of evaporation dish coefficient （K0.6， K0.8， K1.0， K1.2） were used， the effects of different irrigation amount on yield， quality and water use efficiency of drip-irrigated melon in tropical greenhouse were studied. The results indicated that the aboveground total dry weight of melon in larger irrigation water treatment （K1.2 and K1.0） was significantly greater than the others. The larger the irrigation water volume， the greater the melon fruit longitudinal， transverse diameter and yield. While the yield of melon intreatment K1.0 and K1.2 was not significantly different. With the increase of irrigation water， soluble sugar content， soluble protein content， vitamin C content ，center soluble solids content of the fruit and the water use efficiency declined. The indicators of treatment K0.6 was the highest， while of treatment K1.2 was the lowest. Considering yield and quality， under the condition of tropical facilities， evapora