| Cite this article: | 毛丽萍,赵婧,仪泽会,等.不同种植方式和亏缺灌溉对设施黄瓜生理特性及水分利用效率的影响[J].灌溉排水学报,2020,(3):-. |
| Mao Li-ping,Zhao jing,Yi Ze-hui,et al.不同种植方式和亏缺灌溉对设施黄瓜生理特性及水分利用效率的影响[J].灌溉排水学报,2020,(3):-. |
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| Effects of Different Planting Pattern and Deficit Irrigation on Photosynthesis Characteristic and Water Use Efficiency of Cucumber in Facility |
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Mao Li-ping1, Zhao jing1, Yi Ze-hui1, Wang Li-ge2, Jiao Xiao-yan2
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1.Institute of Vegetables,Shanxi Academy of Agricultural Sciences;2.Institute of Agricultural Environment and Resources, Shanxi Academy of Agricultural Sciences
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| Abstract: |
| Abstract:【Objective】This article is to reveal the effects of different planting pattern and deficit irrigation on photosynthetic characteristics of cucumber leaves, material accumulation and water use efficiency of cucumber plants, and select a suitable water-saving cultivation model.【Method】“Jinyou316” cucumber was selected as test material, and 4 different treatments of deficit irrigation and planting pattern were set at the same planting density. Four treatments were " Equal line spacing + 70% irrigation amount (T1)", "Wide and narrow line spacing + 70% irrigation amount (T2)", "Equal line spacing + 100% irrigation amount (T3)", "width and narrow line spacing + 100% irrigation amount" (T4) ". Different irrigation amount started on the 5th day after planting. Physiological characteristics, photosynthesis, morphological indicators and material accumulation of cucumber plants were examined within 6 weeks after planting，and water use efficiency (WUE) and the total yield of cucumber was recorded.【Result】The effects of different planting patterns on physiological characteristics, photosynthesis, morphological indexes, material accumulation and WUE of cucumber were not significant. The cucumber plants with deficit irrigation treatment were in water stress for different degrees, and the content of soluble matter and abscisic acid (ABA) increased significantly. Due to the increase of stomatal limit value(Ls), net photosynthetic rate(Pn), transpiration rate(Tr), dry material accumulation, and total yield decreased by 10.75%, 15.03%, 15.46%, and 12.60% respectively, WUE increased by 20.97%, however. The yield of cucumber in T4 treatment was the highest among the 4 different treatments, water use efficiency of cucumer(WUEET) was the lowest, however. Compared with T4 treatment, the plants in T1 treatment were subjected to a certain degree of water stress, Pn decreased significantly by 13.68%, dry material accumulation decreased significantly by 9.41%, and total yield decreased significantly by 9.30%, WUEETI increased significantly by 23.96%. Peroxidase (POD) activity, malondialdehyde (MDA) content, soluble protein content, and ABA content in cucumber leaves in T2 treatment increased significantly, so plants of cucumber were subjected to water stress. Pn, dry material accumulation and total yield of cucumber in T2 treatment decreased by 10.52%, 23.55%, and 12.37% respectively, WUE of cucumber increased significantly by 23.96%, however. The plants in T3 treatment were not exposed to water stress, and the difference of Pn, dry material accumulation, total yield and WUE of cucumber was not significant.【Conclusion】Although the yield of cucumbers is reduced in deficit irrigation treatment, the WUE is significantly improved due to the larger decrease in water consumption. Although the total yield decreased by 9.30% in T2 treatment, it increased the WUE of cucumber plants by 23.96%, which is a suitable water deficit of planting pattern. |
| Key words: planting pattern; deficit irrigation; Photosynthetic characteristics; water use efficiency; yield; drip irrigation; cucumber |
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