各生育期不同灌水下限对茄子生长、产量及水分利用效率的影响

Effects of different irrigation low limits on growth,production,water use efficiency of eggplant

为指导节水灌溉和增产,在茄子苗期、开花结果期和成熟采摘期进行不同灌水下限处理来研究各生育期不同灌水下限对茄子生长、产量及水分利用效率的影响.试验结果表明:株高、茎粗、叶面积、地上部干重、总根长、总根鲜重和干重均随着灌水下限的降低而降低。与正常灌溉相比,苗期和开花结果期适当降低灌水下限对茄子的生长、产量和水分利用效率的影响不明显.而成熟采摘期时对水分最为敏感,此时降低灌水下限对茄子的生长、产量和水分利用率的影响较为显著.综合灌水量、茄子生长、产量、水分利用效率几个方面考虑,苗期灌水下限60%,开花结果期灌水下限65%,成熟采摘期灌水下限70%是最合适的灌水下限.

In order to improxe water-saxing irrigation and eggplant yield,irrigation modes were designed as seeding stage, flowering period,fruit maturation stage with different irrigation low limits to explore the effects of different irrigation low lim-its at each growth periods on growth. The results show that the plant height,stem thick,leaf area,aboxe biomass,total root length,fresh root weight and dry weight are decreased when the irrigation low limits reduced. Compared with normal irriga-tion,the influence of growth,yield and the water use efficiency is insignificant by appropriately reducing the irrigation low limits in seeding stage and flowering period. The most sensitixe stage to soil moisture is fruit maturation stage. The influence of growth,yield and the water use efficiency is significant wthen we reduced the irrigation low limits. Taking into account ir-rigation amount,growth,production,water use efficiency,the most appropriate irrigation limits are 60% in seeding stage, 65% in flowering period,70% in fruit maturation stage.