Articles
Study on the mechanism of synergistic regulation of cucumber development by different soil-mixed irrigation with brackish and freshwater
Article number
1426_74
Pages
543 – 552
Language
English
Abstract
As an alternative irrigation source, brackish water has been widely used in agriculture of arid and semiarid regions.
But long-term irrigation with brackish water harms vegetable production.
To minimize the risk of salinization, a plot experiment was conducted in Ningxia to investigate the interaction between irrigation water salinity levels (0, 1 and 2 g L‑1 NaCl) and soil treatments (CK, in situ vermicomposting, biochar, in situ vermicomposting with biochar). Results showed that application of in situ vermicomposting and co-application of in situ vermicomposting with biochar could increase the level of soil porosity (0.32-0.45%), organic matter (25.04-38.94 g kg‑1), available nitrogen (252.61-323.71 mg kg‑1) and available potassium (750-880 mg kg‑1) under irrigation water salinity of 1 and 2 g L‑1. The Shannon index ranged from 6.00 to 6.19, and the Chao index ranged from 3081.87 to 3178.67, respectively.
In detail, Actinobacteria (19.24-34.40%), Proteobacteria (17.23-39.00%), Chloroflexi (10.41-24.30%), Firmicutes (2.5-13.89%) have become the dominant population.
Furthermore, the results of redundancy analysis (RDA) demonstrated available nitrogen, available phosphorus, soil enzyme activities, organic matter, soil moisture, and EC showed significant positive correlations with bacterial phylum level of in situ vermicomposting under irrigation water salinity of 0, 1 and 2 g L‑1. After applied with in situ vermicomposting with biochar, the aboveground biomass was increased by 28.41-120.06% compared with the CK. Besides increasing biomass, the metabolic characteristics of cucumber improved. l-serine, fumaric acid, aspartic acid, and related KEGG pathways were significantly enriched.
The soil quality index (SQI) of in situ vermicomposting with biochar maintained 0.50 and 0.51 under irrigation water salinity of 1 and 2 g L‑1. Our results indicate in situ vermicomposting with biochar was an eco-friendly method to reduce the environmental risks of brackish water.
But long-term irrigation with brackish water harms vegetable production.
To minimize the risk of salinization, a plot experiment was conducted in Ningxia to investigate the interaction between irrigation water salinity levels (0, 1 and 2 g L‑1 NaCl) and soil treatments (CK, in situ vermicomposting, biochar, in situ vermicomposting with biochar). Results showed that application of in situ vermicomposting and co-application of in situ vermicomposting with biochar could increase the level of soil porosity (0.32-0.45%), organic matter (25.04-38.94 g kg‑1), available nitrogen (252.61-323.71 mg kg‑1) and available potassium (750-880 mg kg‑1) under irrigation water salinity of 1 and 2 g L‑1. The Shannon index ranged from 6.00 to 6.19, and the Chao index ranged from 3081.87 to 3178.67, respectively.
In detail, Actinobacteria (19.24-34.40%), Proteobacteria (17.23-39.00%), Chloroflexi (10.41-24.30%), Firmicutes (2.5-13.89%) have become the dominant population.
Furthermore, the results of redundancy analysis (RDA) demonstrated available nitrogen, available phosphorus, soil enzyme activities, organic matter, soil moisture, and EC showed significant positive correlations with bacterial phylum level of in situ vermicomposting under irrigation water salinity of 0, 1 and 2 g L‑1. After applied with in situ vermicomposting with biochar, the aboveground biomass was increased by 28.41-120.06% compared with the CK. Besides increasing biomass, the metabolic characteristics of cucumber improved. l-serine, fumaric acid, aspartic acid, and related KEGG pathways were significantly enriched.
The soil quality index (SQI) of in situ vermicomposting with biochar maintained 0.50 and 0.51 under irrigation water salinity of 1 and 2 g L‑1. Our results indicate in situ vermicomposting with biochar was an eco-friendly method to reduce the environmental risks of brackish water.
Publication
Authors
Y. Cao, W. Li, Y. Wei
Keywords
rotation of brackish and freshwater, in situ vermicomposting, biochar
Groups involved
- Division Precision Horticulture and Engineering
- Division Greenhouse and Indoor Production Horticulture
- Working Group Nettings in Horticulture (subgroup of Protected Cultivation in Mild Winter Climates)
- Working Group Light in Horticulture
- Working Group Organic Greenhouse Horticulture
- Working Group Vegetable Grafting
- Working Group Modelling Plant Growth, Environmental Control, Greenhouse Environment
- Working Group Protected Cultivation, Nettings and Screens for Mild Climates
- Working Group Computational Fluid Dynamics in Agriculture
- Working Group Design and Automation in Integrated Indoor Production Systems
- Working Group Mechanization, Digitization, Sensing and Robotics
- Working Group Greenhouse Environment and Climate Control
- Division Landscape and Urban Horticulture
- Commission Agroecology and Organic Farming Systems
- Division Vegetables, Roots and Tubers
- Working Group Vertical Farming
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