【摘要】 为探求黄瓜适宜的节水灌溉方式,以温室栽培的黄瓜自根苗和嫁接苗为试验材料,设定每次灌水150、300和450m3·hm-2的不同灌水量,研究灌水量对黄瓜根系分布、商品瓜产量和水分利用效率的影响。结果表明,与常规灌水量对照(每次450m3·hm-2)相比,适度减少灌水量,在多数情况下不会显著影响黄瓜根系生长、垂直分布与水分利用,每次150m3·hm-2的灌水量对自根与嫁接黄瓜的产量无显著影响,水分利用效率显著提高。每次150m3·hm-2灌水量下,嫁接黄瓜的根系旺盛且粗壮,同时诱发了大量毛细根向土壤深层分布,使其产量显著高于自根黄瓜,因此在减量灌溉条件下,嫁接具有良好的促根节水丰产的效果。更多还原

【Abstract】 A solar greenhouse experiment was carried out to search the optimum mode of water- saving irrigation for cucumber(Cucumis sativus L.‘Jinyu 5’). Different irrigation levels(150,300 and 450 m 3 · hm -2 each time)were set. Cucumber plants were either own-rooted or grafted onto the rootstock (Cucurbita ficifolia). Then root distribution,commodity yield and water use efficiency(WUE)were investigated. The results showed that in most cases,a modest reduction in irrigation quantity didn’t significantly affect the growth,the vertical distribution and absorption of cucumber’s root. Compared with conventional irrigation(450 m 3 · hm -2 each time),irrigation of 150 m 3 · hm -2 each time didn’t significantly affect the yield of own-rooted and grafted cucumber,thus significantly increased WUE. In irrigation of 150 m 3 · hm -2 each time,the roots of grafted cucumber were strong and stout,a large number of capillary roots were induced and distributed to the deep soil,so that the yield of grafted cucumber was higher significantly than that of own-rooted cucumber. On the whole,in the reduction of irrigation,grafting may obtain favorable effects of root-promoting,water-saving and high yield.更多还原