短期封育对滇西北亚高山草甸土壤呼吸速率的影响

欧阳青 代微然 任健 袁福锦 宋丽梅

中国农学通报. 2014, 30(16): 7-11

中国农学通报 ›› 2014, Vol. 30 ›› Issue (16) : 7-11. DOI: 10.11924/j.issn.1000-6850.2013-3101
林学 园艺 园林

短期封育对滇西北亚高山草甸土壤呼吸速率的影响

  • 欧阳青 代微然 任健 袁福锦 宋丽梅
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Effects of Short-term Enclosure on Soil Respiration Rate of Sub-alpine Meadow in Northwestern Yunnan

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摘要

为了认识短期封育对滇西北亚高山草甸土壤呼吸速率、土壤温度、土壤水分等方面的影响，对香格里拉县小中甸镇和平村封育2年后的冬季牧场开展了研究。结果表明，与自然放牧的草甸相比，短期封育不但显著提高了春季和夏季的土壤呼吸速率，而且明显提高了亚高山草甸的植被盖度。封育对春季的土壤温度没有明显影响(P＞0.05)，相反，显著地提高夏季的土壤温度(P<0.01)。另外，研究发现，在短期封育下，无论是春季还是夏季，亚高山草甸的土壤呼吸速率、土壤温度和土壤含水量两两之间的相关性不显著；而自然放牧状态下，春季的土壤温度和土壤含水量之间存在显著的负相关(P<0.05)。

Abstract

In our experiment, we study soil respiration, soil temperature and soil water content as well as vegetation coverage of sub-alpine meadow in northwestern Yunnan Province after two-year enclosure in order to learn short-term enclosure effects. The results showed that short-term enclosure not only significantly increased the soil respiration rate in both spring and summer, but also significantly improved vegetation coverage when compared with the control. In the spring, short-term enclosure had no significant effect on soil temperature (P>0.05), whereas it was significantly improved in summer (P<0.01). According to correlation analysis between the soil respiration, soil temperature and soil water content, no significance was observed in both spring and summer after short-term enclosure. However, significant negative correlation was observed between soil temperature and soil water content of alpine meadow without fencing (P<0.05).

关键词

封育； 亚高山草甸； 土壤呼吸速率； 土壤含水量

Key words

enclosure; sub-alpine meadow; soil respiration; soil water content

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欧阳青 代微然 任健 袁福锦 宋丽梅. 短期封育对滇西北亚高山草甸土壤呼吸速率的影响. 中国农学通报. 2014, 30(16): 7-11 https://doi.org/10.11924/j.issn.1000-6850.2013-3101
Effects of Short-term Enclosure on Soil Respiration Rate of Sub-alpine Meadow in Northwestern Yunnan. Chinese Agricultural Science Bulletin. 2014, 30(16): 7-11 https://doi.org/10.11924/j.issn.1000-6850.2013-3101

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