【摘要】 根据全自动温室内辣椒田间试验资料,研究了时空亏缺灌溉下辣椒需水特性及其对产量的影响。结果表明,在辣椒调亏灌溉的部分生育期引入分根交替灌溉后,灌水沟两侧土壤含水率呈现交替上升和下降的现象,可以使辣椒根系经受一定程度的干旱考验。充分供水条件下,辣椒全生育期耗水量以结果盛期为最大,苗期和开花座果期其次,结果后期最小,各阶段耗水模系数分别为39.96%、22.91%、19.34%和17.79%,各生育期供水量和灌水方式均会影响辣椒的耗水量。为了取得高产和较高的水分利用效率,苗期应进行适当的根系均匀水分亏缺,开花座果期及时复水,结果盛期和结果后期分别采用根系均匀亏缺灌溉和分根交替灌溉。更多还原

【Abstract】 Based on field experimental data gained at automatization greenhouse in water-saving park of Hohai University,character of water demand and yield of space-time deficit irrigation for hot pepper in greenhouse was studied.The results indicated that soil water content at two sides of furrow fluctuated with the introduction of the alternate partial root-zone irrigation during regulated deficit irrigation at some stage of hot pepper,which could enhance the adsorptive ability of root system.Under the condition of abundant water supplying,the maximum water consumption was at vigorous growing stage,followed by seedling stage and bloom and fruit setting stage,relatively small at later fruit-bearing stage,which respectively accounted for 39.96%,22.91%,19.34% and 17.19% of total water consumption.The effects of drought stress and irrigation model at different growing stages on evapotranspiration were significant.In order to attain high yield and high water use efficiency(WUE),moderate uniform deficit irrigation should be introduced to two sides of root-zone at seeding stage,re-water at bloom and fruit setting stages,uniform deficit irrigation and alternate partial root-zone irrigation should be adopted at vigorous growing stage and later fruit-bearing stage,respectively.更多还原