保护地蔬菜节水施肥技术的应用效果研究

选择天津市津南区采用节水灌溉的保护地进行蔬菜施肥技术试验研究,结果表明:在采用减少灌水量、灌水次数等节水技术情况下,施用基肥和追肥能够影响保护地黄瓜的光合速率、呼吸速率、蒸腾速率、气孔导度等生理变化及经济产量、生物产量;增加基肥施用量可以减少因节水灌溉造成的黄瓜产量的降低;减少追肥对黄瓜蒸腾速率、气孔导度的影响效果较减少基肥量的效果好;施用有机基肥、追氮肥能够增强黄瓜的呼吸作用,减少基肥后黄瓜呼吸作用的降低效果比较减少追肥的效果好。另外还比较了几种保护地蔬菜节水施肥技术的效果。

Application Effect of Water Saving and Vegetable Fertilization Techniques in Protective Ground

Field experiments of fertilization technology in water saving protective ground were conducted in Jinnan district of Tianjin,the results were following.Under the situation of decreasing irrigation norm and reducing irrigation times,basal manure and after manuring were able to affect cucumber's growth physiological parameters,such as photosynthetic rate,respiration rate,transpiration rate and stomatal conductivity,and economy output and biology output were also affected.The decrease of cucumber's output due to water saving techniques could be offset by increasing basal manure quantity.The effect of decreasing after manure quantity on transpiration rate and stomatal conductivity was superiors over decreasing basal manure quantity.Respiration was enhanced by using organic basal manure and nitrogen fertilizer,while respiration was inhibited greater through decreasing basal manure other than after manure.