| 三种产业沼气作物根系固土力的原位测定和模型预测 |
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| 引用本文： | 杨旸, 秦向东, 段青松, 等. 三种产业沼气作物根系固土力的原位测定和模型预测[J]. 云南农业大学学报（自然科学）, 2016, 31(6): 1103-1110. DOI: 10.16211/j.issn.1004-390X(n).2016.06.021 |
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| 作者姓名： | 杨旸 秦向东 段青松 龚爱民 李亚伟 王金霞 雷云永 |
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| 作者单位： | 4.云南农业大学 基础与信息工程学院, 云南省高校生物天然气产业化技术工程研究中心, 云南 昆明 650201;5.1. 云南农业大学 水利学院, 云南 昆明 650201;6.2. 云南农业大学 基础与信息工程学院, 云南省高校生物天然气产业化技术工程研究中心, 云南 昆明 650201;7.云南农业大学 水利学院, 云南 昆明 650201;8.湖南省岳阳市水利水电勘测设计院, 湖南 岳阳 414000;9.玉溪市澄江县水利局, 云南 玉溪 653102 |
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| 摘 要： | 本研究采用野外剪切试验和室内抗拉试验的方法，对杂交狼尾草、黑麦草和紫花苜蓿这3种沼气作物的根系固土能力进行研究。结果表明：（1）在地下10 cm深处杂交狼尾草、黑麦草、紫花苜蓿根土体的抗剪强度分别是素土的2.05、1.34、1.76倍。20 cm深度处分别是1.94、1.17、1.75倍。在10 cm和20 cm深处根系提高土体抗剪强度值均为杂交狼尾草 紫花苜蓿 黑麦草，从根系固土能力的角度看，可优先种植杂交狼尾草作为沼气作物。（2）3种产业沼气作物根系抗拉强度与直径存在幂函数负相关关系。3种植物根系抗拉强度的平均值为黑麦草（69.78 MPa） 杂交狼尾草（67.57 MPa） 紫花苜蓿（56.36 MPa）。（3）WU和WALDRON模型预测的作物根系增大土体抗剪强度值，在地下10 cm深处比实测值大1.49倍到5.48倍，20 cm深处大1.90倍到5.93倍，两种深度紫花苜蓿的模型预测值与实测值最为接近。
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| 关 键 词： | 沼气作物 根系固土能力 原位测定 模型预测 |
| 收稿时间： | 2015-09-13 |
| 修稿时间： | 2015-11-01 |
In-situ Measurement and Model Prediction of Fixing Soil Capabilities for Three Industrial Biogas Crops Roots |
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| YANG Yang, QIN Xiangdong, DUAN Qingsong, et al. In-situ Measurement and Model Prediction of Fixing Soil Capabilities for Three Industrial Biogas Crops Roots[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2016, 31(6): 1103-1110. DOI: 10.16211/j.issn.1004-390X(n).2016.06.021 |
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| Authors: | YANG Yang QIN Xiangdong DUAN Qingsong GONG Aimin LI Yawei WANG Jinxia LEI Yunyong |
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| Affiliation: | 4.College of Basic Science and Information Engineering, Yunnan Agricultural University, Engineering and Research Center for Industrial Biogas Technology of Yunnan Province University, Kunming 650201, China;5.1. Water Conservancy College, Yunnan Agricultural University, Kunming 650201, China;6.2. College of Basic Science and Information Engineering, Yunnan Agricultural University, Engineering and Research Center for Industrial Biogas Technology of Yunnan Province University, Kunming 650201, China;7.Water Conservancy College, Yunnan Agricultural University, Kunming 650201, China;8.Water Conservancy and Hydropower Investigation and Design Institute in Yueyang, Yueyang 414000, China;9.Chengjiang Hydrological Bureau, Yuxi 653102, China |
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| Abstract: | We attempted to quantify capabilities of industrial biogas crops roots (Penniseturm americanumP. purpureum, Lolium perenne L. and Medicago sativa) by in-situ direct shear-strength test and laboratory anti-pulling test. Firstly, the anti-shearing strength of biogas crops' root-soil matrix increased 2.05, 1.34 and 1.76 times in 10 cm soil layer, respectively. And it increased 1.94, 1.17 and 1.75 times in 20 cm soil layer than soil, respectively. P. americanumP. purpureum was considered as industrial biogas' crops because it had the largest anti-shearing strength than others. Secondly, three plants root system own strong tensile strength and had negative correlation with the root diameter, the mean values of root strong tensile strength for L. perenne, P. americanumP. purpureum and M. sativa were 69.78, 67.57, 56.36 MPa, respectively. Additionally, the WU WALDRON model was adopted to predict root soil reinforcement capability, the model value is 1.49 to 5.48 times in 10 cm soil layer and is 1.90 to 5.93 times in 20 cm soil layer greater than experiment value. Lastly, the results showed that the model can describe root soil reinforcement capability of M. sativa well. |
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| Keywords: | industrial biogas crops fixing soil capabilities of root in-situ test model prediction |
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