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[1]吴雨晴,田赟,周建琴,等.不同放牧制度草地土壤碳氮磷化学计量特征[J].应用与环境生物学报,2019,25(04):801-807.[doi:10.19675/j.cnki.1006-687x.2018.10004]
 WU Yuqing,TIAN Yun**,ZHOU Jianqin & ZHANG Kebin.Ecological stoichiometric characteristics of soil carbon, nitrogen, and phosphorus under different grazing regimes[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):801-807.[doi:10.19675/j.cnki.1006-687x.2018.10004]
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不同放牧制度草地土壤碳氮磷化学计量特征
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年04期
页码:
801-807
栏目:
生态系统养分循环与保护恢复专栏
出版日期:
2019-08-25

文章信息/Info

Title:
Ecological stoichiometric characteristics of soil carbon, nitrogen, and phosphorus under different grazing regimes
作者:
吴雨晴;?田赟;?周建琴;?张克斌
北京林业大学,水土保持国家林业局重点实验室,林业生态工程教育部工程研究中心 北京 100083
Author(s):
WU Yuqing;? TIAN Yun**;? ZHOU Jianqin & ZHANG Kebin
Key Laboratory of State Forestry Administration on Soil and Water Conservation, Ministry of Education Engineering Research Center of Forestry Ecological Engineering, Beijing Forestry University, Beijing 100083, China
关键词:
放牧制度;?化学计量特征;?草地土壤;?内蒙古
Keywords:
grazing regime;? stoichiometric characteristics;? grassland soil;? Inner Mongolia
分类号:
S812.2
DOI:
10.19675/j.cnki.1006-687x.2018.10004
摘要:
放牧是人类对草地资源管理和利用的主要方式之一,研究不同放牧制度下的草地土壤化学计量特征,可为草地植被的可持续利用和放牧制度的选择提供科学依据. 以呼伦贝尔新巴尔虎左旗4种不同放牧制度(禁牧、休牧、划区轮牧和常牧)的草场为研究对象,通过样地调查和土壤碳(C)、氮(N)和磷(P)3种元素含量的测定,分析4种不同放牧制度下土壤化学计量特征及其与植被群落特征和土壤化学性质的相关性. 结果显示:禁牧条件下,植被生长状况较好. 碳氮磷含量均呈现禁牧>休牧>划区轮牧>常牧的变化趋势;在不同的放牧制度下,土壤碳氮含量集中分布于0-10 cm,且显着高于下层土壤(P < 0.05);4种放牧制度下土壤C/N无明显变化,而常牧区的C/P和N/P均显着低于禁牧区;此外,土壤碳氮磷含量均与pH值呈极显着负相关(P < 0.01),物种丰富度指数和多样性指数均与C/P和N/P呈极显着负相关(P < 0.01). 本研究表明磷是该地区主要的限制性养分元素,且磷含量受土壤深度的影响较小;与常牧相比,禁牧、休牧及轮牧均有利于植物生长、土壤理化性质改良以及养分含量积累. (图2 表3 参39)
Abstract:
Understanding the impact of grazing regimes on ecological stoichiometric characteristics of grassland soil is important for grassland conservation and management. This study aimed to investigate the ecological stoichiometric characteristics of carbon, nitrogen, and phosphorus in the typical temperate grassland of Hulun Buir, Inner Mongolia, China. Plots under different grazing regimes were surveyed, including forbidden grazing, seasonal grazing, rotation grazing, and permanent grazing. We compared four types of grazing regimes by studying vegetation traits, soil properties, and stoichiometric characteristics of soil C, N, and P, and revealed the relationships among them. Under the regime of permanent grazing, vegetation growth was the best. The C, N, and P content was in the following order: forbidden grazing > seasonal grazing > rotation grazing > permanent grazing. Under all four different grazing regimes, the C and N content in the surface soil (0-10 cm) was significantly higher than that in the lower layer (P < 0.05). As for soil stoichiometric ratios, there was no significant change in the C/N among the four different grazing regimes. In contrast, C/P and N/P were the highest in the permanent grazing area and the lowest in permanent grazing area. In addition, the correlation analysis showed that the C, N, and P content was significantly and negatively correlated with pH (P < 0.01), and the species richness index and diversity index were significantly and negatively correlated with C/P and N/P (P < 0.01). P is the main limited nutrient element in the study area, and P content is less affected by soil depth. Compared with permanent grazing, forbidden grazing, seasonal grazing, and rotating grazing are beneficial for plant growth, improvement of edaphic properties, and nutrient accumulation.

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更新日期/Last Update: 2019-08-25