【摘要】 采用新型负压灌溉,研究了不同供水负压和氮肥水平对黄瓜产量、品质及水分利用效率的影响。结果表明,负压灌溉可以显著提高黄瓜产量和水氮利用效率、改善黄瓜品质。与常规灌溉水氮处理(W1N1)相比,负压灌溉水氮处理(W2N1和W3N1)黄瓜产量分别提高了69.3%、20.1%;水分利用效率提高了149.8%、165.6%;氮肥表观利用率提高了52.3%和23.7%;通过因子分析方法和综合评价得出,影响黄瓜品质的关键因子依次为:果实内质因子(45.38%)、果实数量因子(36.32%)和商品瓜率因子(21.10%),说明黄瓜果实的营养成分是影响果实品质最主要的因子,再次为果实数量和商品瓜率因子。综合分析不同水氮处理对黄瓜产量、水氮利用率和品质的影响,推荐W2N1和W3N1两个处理即供水水头为-5 k Pa、-10 k Pa,施氮量(N)为0.3 g/kg为较适宜水氮组合方案。更多还原

【Abstract】 To study the effects of different water supply tension and nitrogenous fertilizer amount on yield,quality and water and nitrogen use efficiency of cucumber,a pot experiment was conducted,using a negative pressure water supplying. Results showed that negative pressure irrigation increased yield and water use efficiency of cucumber and improved the quality of cucumber. Yield,water use efficiency and apparent N recovery at W2N1 were 69. 3%,149. 8% and 52. 3% higher than those at conventional treatment( W1N1); Yield,water use efficiency and apparent N recovery at W3N1 were 20. 1%,165. 6% and23. 7% higher than those at conventional treatment( W1N1). The primary factors affecting the quality of cucumber were fruit interior quality( 45. 38%),amount( 36. 32%) and marketable fruit rate( 21. 10%) by the method of factor analysis and comprehensive evaluation. The above results indicated that W2N1 and W3N1 were more suitable for cucumber growth.更多还原