Effects of Nutrient Solution Irrigation Quantity and Downy Mildew Infection on Growth and Physiological Traits of Greenhouse Cucumber

• DOI: 10.3390/agronomy10121921
• Publication Date: 2020-12-07T17:24:39Z
• Authors: Yafei Wang; Guoxin Ma; Xiaoxue Du; Yong Liu; Bin Wang; Guilin Xu; Hanping Mao
• Keywords: Stomatal Conductance; Fertigation

Abiotic and biotic stresses both decrease the quality quantity of cultivated plants. In this study, in order to see responses cucumber plants drought stress downy mildew infection, infestation at different two levels, B1 (disease infestation) B2 (no disease infestation), along with three fertigation requirement full T1, moderate nutrient solution deficit T2 severe T3, were applied a greenhouse. Thus, six treatments, i.e., B1T1, B1T2, B1T3, B2T1, B2T2 B2T3, set. The leaf gas-exchange parameters significantly increased under CK (control experiment, B2T1: no irrigation) treatment, photosynthesis rate, transpiration rate stomatal conductance decreased B1T1 treatment. Leaf intercellular CO2 concentration was B2T3 treatments. Compared treatment (B2T1), plant height treatments by 11.41%, 19.05%, 27.48%, 7.55% 10.62%, respectively; stem diameter 5.70%, 13.45%, 23.03%, 9.46% 15.74%, area 22.79%, 38.68%, 58.28%, 13.76% 29.96%, respectively. root–shoot ratio 3.16%, 2.99%, 4.11%, 3.92%, 3.13% 3.63%, highest B1T3