The interaction between poisonous plants and soil quality in response to grassland degradation in the alpine region of the Qinghai-Tibetan Plateau
The interaction between poisonous plants and soil quality in response to grassland degradation in the alpine region of the Qinghai-Tibetan Plateau
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DOI：
10.1007/s11258-014-0333-z
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发表时间：
2014-08-01
期刊：
影响因子：
1.7
通讯作者：
Wu, Yu
中科院分区：
文献类型：
--
作者：
Li, Yuan-Yuan;Dong, Shi-Kui;Wu, Yu
采用有毒植物多样性指数、盖度、组成等有毒植物特征和土壤理化、生物学指标，研究了青藏高原草地退化过程中有毒植物分布和土壤质量的变化。与非退化草地相比，退化草地的有毒植物盖度和多样性显著增加。草地利用方式对有毒植物的组成和特征有显著影响。结果表明，与秸秆还田相比，秸秆还田土壤养分含量和土壤酶活性均有所提高，土壤pH值和土壤容重均有所降低，土壤养分状况较秸秆还田更好。土壤质地、pH值和BD值对有毒植物的结构有重要影响。结果表明，草地退化对有毒植物的覆盖度和多样性有显著影响;反过来，有毒植物也加剧了草地退化，降低了青藏高原土壤肥力。
The objective of this study was to explore the distribution of poisonous plants and soil quality in relation to grassland degradation in the Qinghai-Tibetan Plateau (QTP) by employing poisonous plants characteristics including diversity index, coverage and composition and the soil properties including soil physical, chemical, and biological indicators. The degraded grasslands (DGs) had significantly increased cover and diversity values of poisonous plants compared with the non-DGs (NDGs). Grassland use types had significant effects on the composition and characteristics of poisonous plants. The NDGs had increased levels of soil nutrients and soil enzyme activities, with decreased soil pH and bulk density (BD), indicating a higher and better soil nutrient status compared with DGs. The soil texture, soil pH, and soil BD were very important in affecting the structures of poisonous plants. We concluded that grassland degradation had significant effect on poisonous plants coverage and diversity; conversely, poisonous plants also aggregated the grassland degradation, decreasing the soil fertility in the QTP.