Year: 2023
Type: article
Abstract: In this research, we analyzed the impact of waterlogging stress on the soil invertase activity (SIA), soil urease activity (SUA), maize growth-related indicators and maize yield-related indicators, and obtained the correlations between them.Results showed that waterlogging stress has different degrees of negative effects on the two enzyme activities, as well as most of maize growth-related/yield-related indicators.The negative effect is intensified with the increase of flooding depth or duration, and the flooding depth had a greater effect than the flooding duration.Compared with the treatment of no waterlogging control (treatment CK), the treatment of waterlogging lasting 4 d with depth of 15 cm (treatment H3T2) resulted in a decrease of SIA by 44.1% (1 d), 29.7% (7 d) and 21.4% (21 d), and reduced SUA by 25.8% (1 d), 21.5% (7 d) and 10.3% (21 d), respectively.The waterlogging adversely affected the yield of maize.Kernel dry weight (KDW) is directly related to corn yield, and decreased by 18.5% compared with treatment CK.SIA and SUA showed strong positive correlation with most growth-related/yield-related indicators, but SUA showed a slightly stronger correlation with these indicators than SIA.Among 10 indicators, there were 8 indicators whose correlation coefficient with SIA exceeded 0.8, accounting for about 80%.There were 9 indicators whose correlation coefficient with SUA exceeded 0.8, accounting for about 90% of the 10 indicators.In cluster analysis, KDW of waterlogging stress was prioritized into four main clusters.The flooding depth of 10 cm (H = 10 cm) and the flooding duration of 4 d (T = 4 d) were regarded as critical point in the study.
Authors: W.Y. ZHANG, X. YANG, X.P. GUO, M. HOU, Y. JU, Z.H. WANG
Institution: Hohai University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: diamond
OpenAlex ID: W4320040822