异根嫁接对黄瓜适度水分亏缺下营养生长和养分吸收的影响

为研究异根嫁接黄瓜对适度水分亏缺的响应,以中农26号黄瓜(Cucumis sativas L.)为材料,以自根嫁接黄瓜适宜水分管理(每次20m3/667m2)为对照,研究异根嫁接黄瓜生长和养分吸收等指标对适度亏缺灌溉(每次12m3/667m2)的响应。结果表明:与自根嫁接黄瓜相比,适度亏缺灌溉下,异根嫁接黄瓜的生长势较强,每株黄瓜N、P和K养分的积累量分别提高了49.6%~53.3%、16.7%~29.0%和32.2%~40.5%;产量和总生物量也显著提高。这一结果表明,通过异根嫁接可以在减少灌水量的同时,维持地上部营养生长,促进养分吸收和干物质积累,从而实现良好的农艺节水效果。

Influence of grafting on cucumber growth and nutrient absorption under water-deficient condition

This study was concerned on the response of different-root-grafting (G1) to moderate deficient irrigation (12 m³/667 m², W1).The cucumber "Zhongnong No.26" (Cucumis sativas L.) was used as the test material, and self-root grafted cucumber (G0) under appropriate irrigation (20 m³/667 m², W2) as control.The results showed that, compared to self-root grafted cucumber the different-root-grafting under moderate deficient irrigation condition had stronger growth and higher N, P and K contents, 49.6%-53.3%, 16.7%-29.0% and 32.2%-40.5% respectively, .The total plant biomass and fruit yield were significantly higher under different-root-grafting than that under self-root-grafting.The different-root-grafting could thus improve cucumber growth and enhance nutrient absorption and dry matter accumulation under moderate deficient irrigation condition.In addition, different-root-grafting can enhance water-saving quantity by decreasing irrigation quantity and may be used as one of the effective water saving techniques.