| 人工草地建设对甘南草原土壤理化特性和微生物数量特征的影响 |
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| 引用本文： | 姚宝辉,王缠,郭怀亮,张倩,杨晶,康宇坤,苏军虎.人工草地建设对甘南草原土壤理化特性和微生物数量特征的影响[J].水土保持学报,2019,33(1):192-199. |
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| 作者姓名： | 姚宝辉 王缠 郭怀亮 张倩 杨晶 康宇坤 苏军虎 |
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| 作者单位： | 1. 甘肃农业大学草业学院, 草业生态系统教育部重点实验室, 甘肃省草业工程实验室, 中美草地畜牧业可持续发展研究中心, 兰州 730070;2. 甘肃农业大学-新西兰梅西大学草地生物多样性研究中心, 兰州 730070 |
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| 基金项目： | 国家自然科学基金项目（31460566，31760706）；甘肃省杰出青年基金项目（1606RJDA314）；甘肃农业大学"伏羲杰出人才"培育项目（Gaufx-02J03）；教育部重点实验室开放基金项目（2017-GSAU-CYJ-03） |
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| 摘 要： | 研究甘南草原高寒草甸退化草地人工种草后土壤理化性质和微生物数量特征,为退化草地的修复与利用提供参考。于2017年5,7,10月分别采集播种燕麦、黑麦及其未播种的草地土壤,测定其理化特性及微生物数量特征。结果表明:人工种植的黑麦草地土壤水分均大于燕麦人工草地,5,7月人工草地土壤含水量均显著大于对照草地,但10月差异不显著(P>0.05);pH在各月份不同播种方式下差异均不显著(P>0.05);土壤全氮、全磷在不同月份间差异亦不显著(P>0.05),但黑麦人工草地5月10—20cm层的有机碳、10月40—50cm层的全氮含量均显著大于燕麦人工草地及对照样地(P<0.05),7月20—30cm层燕麦人工草地的有机碳含量显著大于黑麦人工草地及对照草地;5月0—30cm层燕麦人工草地和黑麦人工草地的细菌数量显著高于对照草地的细菌数量(P<0.05),7月0—10cm层人工草地细菌数量显著高于对照草地(P<0.05),10月黑麦人工草地0—30cm层细菌数量均显著高于对照草地(P<0.05);5,10月真菌数量在0—10cm层人工草地显著高于对照草地(P<0.05),7月10—30cm层人工草地的真菌数量、0—10cm层的放线菌数量均显著高于对照草地(P<0.05);冗余分析发现,土壤细菌和真菌的变化具有联动性,且与土壤有机质、全氮、全磷等养分呈正相关。综上,人工种草后土壤养分的变化导致了土壤微生物数量的差异,这需要在草地管理中予以重视。
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| 关 键 词： | 甘南草原 人工草地建植 土壤理化性质 微生物数量 冗余分析 |
| 收稿时间： | 2018/8/12 0:00:00 |
Effects of Artificial Supplementary Sowing on Soil Physical and Chemical Characteristics and Microorganism Quantity in Gannan Grassland |
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| YAO Baohui,WANG Chan,GUO Huailiang,ZHANG Qian,YANG Jing,KANG Yukun,SU Junhu.Effects of Artificial Supplementary Sowing on Soil Physical and Chemical Characteristics and Microorganism Quantity in Gannan Grassland[J].Journal of Soil and Water Conservation,2019,33(1):192-199. |
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| Authors: | YAO Baohui WANG Chan GUO Huailiang ZHANG Qian YANG Jing KANG Yukun SU Junhu |
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| Institution: | 1. Key Laboratory of Grassland Ecosystem, Ministry of Education, Gansu Pratacultural Engineering Laboratory, Sino-U. S. Centers for Grazing Land Ecosystem Sustainability, College of Grassland Science, Gansu Agricultural University, Lanzhou 730070;2. Gansu Agricultural University-Massey University Research Centre for Grassland Biodiversity, Gansu Agricultural University, Lanzhou 730070 |
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| Abstract: | The aim of the current study was to examine the changes of soil physical and chemical properties and microbial quantity characteristics and to provide a reference for the restoration and utilization of the degraded grassland in alpine meadow of Gannan, Gansu Province. Soils were classified as reseeded rye group, reseeded oat group and non-reseeded (control group), and the soil was collected from the above three groups on May, July and October 2017, respectively, to investigate their physiochemical characteristics and the microbial quantity characteristics. Results showed that the soil water contents of reseeded rye grassland was significantly higher than that of oat grassland (P<0.05), the soil water contents of the above grassland were significantly higher than that of control in May and July, while there was no significant difference in October (P>0.05). There was no significant difference in pH among different sowing methods in each month (P>0.05). There was no significant difference in total nitrogen and phosphorus contents among different soil groups (P>0.05). However, the soil organic carbon contents in 10-20 cm soil layer in May, and the total nitrogen content in 40-50 cm soil layer in October of the reseeded rye group were significantly higher than the same parameters of the oat and control groups (P<0.05). On the contrary, the soil organic carbon content in 20-30 cm soil layer of the reseeded oat group was significantly higher than those of the rye and control groups in July. In May, the soil bacterial loads in 0-30 cm soil layer of the reseeded rye and oat groups were significantly higher than that of the control group (P<0.05), while the same parameter in 0-10 cm soil of reseeded groups was significantly higher than that of the control group in July (P<0.05), and the bacterial load in 0-30 cm soil layer of the reseeded rye group was significantly higher than that of the control in October (P<0.05). In May and October, the fungal load in 0-10 cm soil layer of both reseeded rye and oat groups were significantly higher than that of the control group (P<0.05), and the fungal load in 10-30 cm soil layer and actinomycelial load in 0-10 cm soil layer of reseeded groups were significantly higher than that of control group in July (P<0.05). Redundancy analysis showed that the changes of soil bacteria and fungi were linkage, and positively correlated with soil organic carbon, total nitrogen, total phosphorus and other nutrients. Therefore, it could be concluded that the changes of soil nutrients after supplementary sowing had led to the differences in soil microbial quantity, which needed attention in grassland restoration and management practices. |
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| Keywords: | Gannan grassland supplementary sowing soil physical and chemical properties microorganism quantity redundancy analysis |
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