孔穴型式和营养液浓度对黄瓜潮汐式穴盘育苗效果的影响

为了筛选出黄瓜潮汐式穴盘育苗最适孔穴型式和营养液浓度,以黄瓜品种中农18号为试材,采用两种类型穴盘(常规、侧开口)和3种浓度(×1、×0.5、×0.25)营养液进行潮汐育苗试验,测定了幼苗矿质元素吸收积累量及表观形态指标等。结果表明:随着营养液浓度逐步提高,黄瓜幼苗矿质元素吸收积累量逐渐增加,N、P、K的吸收积累量增幅达102.6%~125.1%,并促进了叶片叶绿素合成和幼苗株高、茎粗、单株叶面积、地上部干鲜质量等表观参数指标优化。此外,常规穴盘育苗效果总体优于侧开口穴盘。最终,以壮苗指数为主要参考指标,筛选出最佳的孔穴型式与营养液浓度组合,即采用常规穴盘并灌溉完全Hoagland营养液。

Effects of Cell Pattern and Nutrient Solution Concentration on Cucumber Plug Seedling Growth under Ebb and Flow Irrigation

In order to screen the optimum cell pattern and nutrient solution concentration for cucumber plug seedling growth under ebb and flow irrigation，this experiment took Cucumber（Cucumis sativus cv． ‘Zhongnong No.18’）as material，and adopted 2 patterns of cell（ regular and abnormal） and 3 nutrient solution concentrations（×1，×0.5 and ×0.25）to conduct plug seedling growth under ebb and flow irrigation and to test seedling mineral elements absorption，accumulation，and apparent morphological indicators，etc．The results showed that along with the gradual increasing of nutrient solution concentration，the amount of mineral elements absorption and accumulation were gradually increased，that of N，P，K were increased by 102.6%-125.1%． The chlorophyll synthesis of leaf and seedling plant height，stem diameter，leaf area and fresh and dry weight of stem and leaves were all increased with the nutrient solution concentration increasing．The effect of normal plug seedling was better than that of the abnormal one．Thus，the seedling health index was taken as the major reference index，and an optimal combination，i.e. regular cell pattern plus Hoagland nutrient solution at ×1 concentration level，was obtained．