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温室辣椒时空亏缺灌溉需水特性与产量的试验

, PP. 117-121

Keywords: 辣椒,根系分区交替灌溉,调亏灌溉,需水特性,产量

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Abstract:

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。

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