| 土壤管理措施对坡耕地侵蚀退化耕层的恢复作用 |
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| 引用本文： | 宋鸽,史东梅,蒋光毅,江娜,叶青,张健乐. 土壤管理措施对坡耕地侵蚀退化耕层的恢复作用[J]. 中国农业科学, 2021, 54(8): 1702-1714. DOI: 10.3864/j.issn.0578-1752.2021.08.010 |
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| 作者姓名： | 宋鸽 史东梅 蒋光毅 江娜 叶青 张健乐 |
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| 作者单位： | 1西南大学资源环境学院,重庆 4007152重庆市水土保持生态环境监测总站,重庆 401147 |
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| 基金项目： | 国家自然科学基金(41771310) |
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| 摘 要： | [目的]紫色土坡耕地土壤侵蚀严重,研究土壤管理措施对不同侵蚀程度坡耕地耕层侵蚀恢复作用,为紫色土坡耕地耕层质量调控和坡耕地持续利用提供理论及实践依据.[方法]采用单因素方差分析(One-way ANOVA)检验各指标的差异显著性,研究不施肥(CK)、施化肥(F)、施生物炭+化肥(BF)3种土壤管理措施对侵蚀0 cm(S...
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| 关 键 词： | 紫色土坡耕地 耕层 侵蚀程度 管理措施 土壤可蚀性 |
| 收稿时间： | 2020-06-26 |
Effects of Different Fertilization Methods on Restoration of Eroded and Degraded Cultivated-Layer in Slope Farmland |
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| SONG Ge,SHI DongMei,JIANG GuangYi,JIANG Na,YE Qing,ZHANG JianLe. Effects of Different Fertilization Methods on Restoration of Eroded and Degraded Cultivated-Layer in Slope Farmland[J]. Scientia Agricultura Sinica, 2021, 54(8): 1702-1714. DOI: 10.3864/j.issn.0578-1752.2021.08.010 |
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| Authors: | SONG Ge SHI DongMei JIANG GuangYi JIANG Na YE Qing ZHANG JianLe |
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| Affiliation: | 1College of Resources and Environment, Southwest University, Chongqing 4007152Chongqing Eco-environment Monitoring Station of Soil and Water Conservation, Chongqing 401147 |
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| Abstract: | 【Objective】The soil erosion of purple soil slope farmland is serious. The study on the effects of soil management measures on the restoration of soil erosion of different erosion degree of cultivated-layer in slope farmland could provide a theoretical and practical basis for the quality control and sustainable utilization of purple soil slope farmland. 【Method】One way ANOVA was used to test the significance of the differences of each index, and the effects of soil management measures on the restoration of soil properties in the cultivated-layer of slope farmland with five degrees of erosion was studied. 【Result】(1) With the increase of erosion degree, the content of sand increased from 38.1%-42.4% to 44.2%-46.4%, while the content of clay decreased from 12.6%-14.8% to 9.6%-11.0%. Compared with S-0, S-5 and S-10, soil bulk density of S-15 and S-20 increased significantly. Under the S-10 erosion degree, the total porosity and capillary porosity decreased the most, and the shear strength of soil was the largest, between 8.71 and 9.56 kg·cm-2. Under the treatments of F and BF, the stable infiltration rate and average infiltration rate of S-15 erosion degree soil decreased the most. (2) There was significant difference in soil properties of cultivated-layer under different management measures. The soil bulk density of 0-10 cm and 10-20 cm soil layers under fertilization treatments was significantly lower than that under CK (P<0.05), and the soil total porosity and capillary porosity were significantly higher than that under CK and F. Under BF treatment, the initial infiltration rate, stable infiltration rate and average infiltration rate were the largest, while those under CK treatment are the smallest. Compared with CK treatment, the shear strength of BF treatment increased significantly. (3) With the increase of erosion degree, K value of soil erodibility decreased significantly. Compared with S-0, K value of soil erodibility was decreased by 0.1960%-0.2192% under S-20 erosion degree. Under BF treatment, K value of soil erodibility was the highest, followed by F treatment, and CK was the lowest. Compared with CK, the increase of F and BF in S-10 was the largest, with an increase of 0.0684% and 0.1404%, respectively. 【Conclusion】The application of biochar and chemical fertilizer was more effective than that of chemical fertilizer alone in improving soil material composition, structural characteristics and soil water storage and permeability. Applying biochar and chemical fertilizer could effectively reduce the soil erosion in the cultivated-layer of purple soil slope farmland, and the effects of soil improvement in the cultivated-layer (0-20 cm) of 10 cm slope was the best. |
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| Keywords: | slope farmland of purple soil cultivated-layer erosion degree management measures soil erodibility |
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