大棚膜下滴灌黄瓜结果期适宜灌溉频率试验研究

为了合理地制定大棚滴灌灌溉制度,以大棚黄瓜为对象,在结果期设置了4种膜下滴灌灌溉频率(每隔3、6、9、12 d灌溉一次),并以传统沟灌灌溉作为对照,研究了不同灌溉频率对黄瓜生长(株高,茎粗和叶片数)和产量的影响。结果表明,与传统沟灌相比,采用滴灌灌溉有利于黄瓜生长并获得高产;在滴灌条件下,灌溉频率越高,植株越高大粗壮,叶片越多,同时促进了果实成熟;但灌溉频率对总产量影响较小,不同处理之间产量差异均不显著(p0.05)。综合比较,6 d灌溉一次黄瓜长势较好,产量最大112.4 t/hm~2,灌溉工作量合理,因此,建议在大棚黄瓜结果期滴灌灌溉频率以每隔6 d一次为宜。

Experimental Study on the Irrigation Frequency of Mulch-drip Irrigation at Fruiting Stage of Cucumber in the Greenhouse

In order to make irrigation scheduling of mulch-drip irrigation in the greenhouse more reasonable, an experiment was carried out in this paper.Cucumber was taken for example, and at its fruiting stage, four irrigation frequencies (with intervals of 3, 6, 9, and 12 days, respectively) in mulch-drip irrigation were controlled, while local furrow irrigation was used as check treatment.The effects of irrigation frequency on the growth (plant height, stem diameter, and leaf number) and yield were studied and the results showed that, compared to the traditional furrow irrigation, cucumbers grew better and got higher yields under mulch-drip condition.Between drip irrigation treatments, the higher irrigation frequency, the better cucumber grew with higher plant height, larger diameter, and more leaves, also the earlier cucumber fruit reached maturity.However, the effect of irrigation frequency on yield was not obviously, and the differences between treatments were not significantly (p<0.05).Compared comprehensively, irrigation every 6 days had a better plant type and highest yield of 112.4 t/hm+2, besides that, its workload was acceptable, therefore, it was recommended as a suitable irrigation scheduling for mulch-drip irrigation in greenhouse.