| Transport trends of soil water and salt of corn\|field in black soil region under straw mulching based on HYDRUS-1D |
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| DOI：10.7606/j.issn.1000-7601.2023.05.05 |
| Key Words: straw mulching corn field soil water and salt transport HYDRUS-1D model black soil region |
| Author Name | Affiliation | | LIU Jilong | School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | LV Hang | School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | CAO Xiaoqiang | School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | LI Jizhen | School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China | | ZHANG Lingling | Collage of arts and sciences, Northeast Agricultural University, Harbin, Heilongjiang 150030, China | | Idimesheva Olga | School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture and Rural Affairs, Harbin, Heilongjiang 150030, China |
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| Abstract: |
| To reveal the influence mechanism of different straw mulch amounts on soil water\|salt transport in corn fields of black soil areas, the HYDRUS-1D model was used to simulate the soil water\|salt transport process under straw mulching and analyze the influence trends of different straw mulching amounts on soil water\|salt dynamics based on the results of field experiments.The results showed that straw mulching enhanced soil water retention and inhibit soil salt accumulation, and the effects of straw mulching on soil water and salt transport were more significant as the amount of straw mulching increased, the average water content of straw half mulch and full mulch increased by 3.38%~5.78% and 5.26%~9.62%, respectively, and the average conductivity decreased by 4.61%~8.93% and 8.87%~12.41%, compared with bare ground 40 cm soil layer during the whole fertility period of maize. Based on the simulation results of the HYDRUS-1D model, it was known that the coefficients of determination between simulated and measured soil water content values ranged from 0.903~0.940, the standard errors ranged from 0.010~0.014 cm3·cm-3, and the average relative errors ranged from 3.46%~4.64%.The coefficients of determination between simulated and measured soil electrical conductivity values ranged from 0.817~0.853, the standard errors ranged from 0.091~0.111 mS·cm-1, and the average relative errors ranged from 4.06%~5.46%. The error analysis showed that the HYDRUS-1D model had high simulation accuracy and should be used to simulate the soil water\|salt transport processes in agricultural fields under straw mulching conditions in the study area. |
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