| 刘继龙,吕航,曹晓强,李济桢,张玲玲,奥列格.基于HYDRUS-1D的秸秆覆盖条件下黑土区玉米田土壤水盐运移规律[J].干旱地区农业研究,2023,(5):43~50 |
| 基于HYDRUS-1D的秸秆覆盖条件下黑土区玉米田土壤水盐运移规律 |
| 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 |
| 中文关键词: 秸秆覆盖 玉米田 土壤水盐运移 HYDRUS-1D模型 黑土区 |
| 英文关键词:straw mulching corn field soil water and salt transport HYDRUS-1D model black soil region |
| 基金项目:国家自然科学基金（52079030）；国家重点研发计划项目子课题(2021YFD1500802-2)；农业农村部政府购买服务项目(125A0605) |
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| 中文摘要: |
| 为揭示不同秸秆覆盖量对黑土区玉米田农田土壤水盐运移的影响机制，基于田间试验结果，利用HYDRUS-1D模型对秸秆覆盖下农田土壤水盐运移过程进行模拟，分析不同秸秆覆盖量对土壤水盐动态的影响规律。结果表明：秸秆覆盖可以增强土壤保水性、抑制土壤盐分积累，随秸秆覆盖量增加，秸秆覆盖对土壤水盐运移的作用效果更加明显，在玉米全生育期内秸秆半量覆盖及全量覆盖较裸地40 cm耕层内各土层平均含水率分别提高3.38%~5.78%和5.26%~9.62%、平均电导率分别降低4.61%~8.93%和8.87%~12.41%。基于HYDRUS-1D模型模拟结果可知，土壤含水率模拟值与实测值的决定系数介于0.903~0.940，标准误差介于0.010~0.014 cm3·cm-3，平均相对误差介于3.46%~4.64%；土壤电导率模拟值与实测值的决定系数介于0.817~0.853，标准误差介于0.091~0.111 mS·cm-1，平均相对误差介于4.06%~5.46%。误差分析表明HYDRUS-1D模型模拟精度较高，能够用于模拟研究区秸秆覆盖条件下农田土壤水盐运移过程。 |
| 英文摘要: |
| 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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