论文部分内容阅读
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。
A new type of negative pressure irrigation was used to study the effects of different negative pressure and nitrogen level on water yield, quality and water use efficiency of cucumber. The results showed that negative pressure irrigation can significantly increase cucumber yield, water and nitrogen use efficiency and improve cucumber quality. Compared with W1N1, the cucumber yield under W2N1 and W3N1 treatments increased by 69.3% and 20.1%, and the water use efficiency increased by 149.8% and 165.6% respectively. The apparent nitrogen use efficiency (52.3% and 23.7%). The key factors affecting cucumber quality were as follows: fruit endoplasmic factor (45.38%), fruit quantity factor (36.32%) and product melon rate factor (21.10 %), Indicating that the nutritional content of cucumber fruit is the most important factor affecting the fruit quality, once again, the number of fruit and fruit melon rate factor. Comprehensive analysis of different water and nitrogen treatments on cucumber yield, water and nitrogen utilization and quality, recommended W2N1 and W3N1 two treatment is the water head -5 k Pa, -10 k Pa, nitrogen (N) 0.3 g / kg is more suitable for water and nitrogen combination program.