| 覆盖作物根系对砂姜黑土压实的响应 |
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| 引用本文： | 严磊,张中彬,丁英志,王玥凯,王永玖,甘磊,彭新华.覆盖作物根系对砂姜黑土压实的响应[J].土壤学报,2021,58(1):140-150. |
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| 作者姓名： | 严磊 张中彬 丁英志 王玥凯 王永玖 甘磊 彭新华 |
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| 作者单位： | 桂林理工大学, 广西环境污染控制理论与技术重点实验室科教结合科技创新基地, 广西桂林 541004;土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所), 南京 210008;土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所), 南京 210008;中国科学院大学, 北京 100049;安徽省龙亢农场, 安徽怀远 233426 |
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| 基金项目： | 国家自然科学基金项目（41771264，41930753）、国家重点研发计划项目课题（2016YFD0300809）和江苏省重点研发计划项目（BE2017385）资助 |
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| 摘 要： | 轮作直根系的覆盖作物被认为是缓解土壤压实的有效手段,但不同覆盖作物对土壤压实的适应性在不同气候和土壤条件下存在较大差异.为筛选更适宜缓解砂姜黑土压实的覆盖作物品种(模式),在安徽典型砂姜黑土设置不压实(Non-compacted,NC)与压实(Compacted,C)处理,通过种植不同覆盖作物(休闲、苜蓿、油菜、萝卜+...
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| 关 键 词： | 土壤压实 土壤结构 根系生长 根系穿透力 萝卜 毛苕子 |
| 收稿时间： | 2019/9/25 0:00:00 |
| 修稿时间： | 2019/12/31 0:00:00 |
Response of Cover Crop Roots to Soil Compaction in a Vertisol(Shajiang Black Soil) |
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| YAN Lei,ZHANG Zhongbing,DING Yingzhi,WANG Yuekai,WANG Yongjiu,GAN Lei,PENG Xinhua.Response of Cover Crop Roots to Soil Compaction in a Vertisol(Shajiang Black Soil)[J].Acta Pedologica Sinica,2021,58(1):140-150. |
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| Authors: | YAN Lei ZHANG Zhongbing DING Yingzhi WANG Yuekai WANG Yongjiu GAN Lei PENG Xinhua |
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| Institution: | Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin University of Technology, Guilin, Guangxi 541004, China;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;University of Chinese Academy of Sciences, Beijing 100049, China;Longkang Farm of Anhui Province, Huaiyuan, Anhui 233426, China |
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| Abstract: | Objective] As farming mechanization is developing rapidly in agriculture, more and more large-sized farming machines are running in farmlands, bringing high pressure onto the soils and making them higher in soil bulk density, and consequently lower in water and air permeability, which eventually lead to lower crop yields. Rotation with cover crops that have taproots going deep into the soil is believed to be an effective measure to improve soil structure and alleviate soil compaction. However, cover crops vary in adaptability to soil compaction with climate and soil properties. The objectives of this study were to investigate responses of cover crops different in species (modes) to soil compaction, and to verify which one is the best to adapt to soil compaction relative to region.Method] A field experiment, laid out in a field of Vertisol in the Longkang Farm of Anhui, was designed to have two treatments different in soil compactness (not compacted vs compacted) and four cover crop treatments (Fallow, Alfalfa, Oil Rape, Radish + Hairy Vetch intercropped). Soil bulk density, penetration resistance, shrinkage behaviors, and cover crop root systems were measured and analyzed for characterizing response of the root systems of the cover crops to soil compaction.Result] Results show that in the compacted treatment, soil bulk density in the 0~30 cm topsoil layer (P<0.05) and soil penetration resistance in the 0~27.5 cm and 37.5~45 cm soil layers was significantly higher (P<0.05), and soil shrinkage behavior in the 0~20 cm soil layer was altered, relative to those in the non-compacted treatment. Besides, in the compacted treatment, Alfalfa, Oil Rape and Radish+Hairy Vetch was lower in root dry weight density in the 0~50 cm soil layer, but higher in root specific surface area; Radish+Hairy Vetch was higher in average root dry weight density, root volume density and root length density in the 50~70 cm soil layer than Alfalfa and Oil Rape, indicating that Radish+Hairy Vetch was higher than Alfalfa and Oil Rape in root penetration capability. In the compacted treatment, in terms of coverage and shoot biomass, the cover crops exhibited an order of Radish+Hairy Vetch intercropping > Oil Rape > Alfalfa. Compared with the cover crops in the non-compacted treatment, Alfalfa, Oil Rape and Radish+Hairy Vetch in the compacted treatment was 62.5%, 67.6% and 15.8%, respectively, higher in shoot biomass and 61.4%, 57.7% and 47.8%, respectively lower in root biomass.Conclusion] In conclusion, the root systems of Alfalfa, Oil Rape and Radish+Hairy Vetch respond differently to soil compaction. Radish + Hairy Vetch intercropping is the most adaptable to soil compaction. |
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| Keywords: | Soil compaction Soil structure Root growth Root penetration Radish Hairy Vetch |
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