本文選題：放牧活動(dòng) + 草地生態(tài)系統(tǒng)�。� 參考：《草業(yè)學(xué)報(bào)》2016年10期

【摘要】：草原生態(tài)系統(tǒng)碳庫(kù)變化對(duì)全球碳平衡有著重要作用。近年來(lái),盡管在全球尺度上開(kāi)展了大量關(guān)于放牧對(duì)草原生態(tài)系統(tǒng)碳循環(huán)影響的獨(dú)立研究,但放牧活動(dòng)對(duì)草原生態(tài)系統(tǒng)不同碳庫(kù)影響的一般規(guī)律認(rèn)識(shí)仍然存在廣泛爭(zhēng)議。本研究采用整合分析方法對(duì)全球105篇關(guān)于放牧干擾對(duì)草原生態(tài)系統(tǒng)碳循環(huán)影響的文獻(xiàn)進(jìn)行系統(tǒng)研究。結(jié)果表明,放牧活動(dòng)顯著減少了植物地上和地下以及相關(guān)碳庫(kù)的大小,而對(duì)土壤呼吸通量有明顯的促進(jìn)作用;不同類型碳庫(kù)在不同氣候帶上響應(yīng)存在明顯差別,放牧對(duì)半濕潤(rùn)/濕潤(rùn)區(qū)地下植物碳庫(kù)和土壤碳庫(kù)減少幅度分別為15.21%和15.35%,顯著高于干旱/半干旱地區(qū)響應(yīng)比;植物地上部分碳庫(kù)與土壤碳庫(kù)之間沒(méi)有顯著關(guān)系,而植物地下部分碳庫(kù)與土壤碳庫(kù)之間呈顯著正相關(guān);土壤碳庫(kù)響應(yīng)比與年平均降水量呈正相關(guān)關(guān)系,而與年平均溫度呈顯著負(fù)相關(guān);植物地下碳庫(kù)響應(yīng)比與年平均降水量和年平均溫度均呈現(xiàn)顯著負(fù)相關(guān)關(guān)系;放牧活動(dòng)不僅顯著地減少了植物地上和地下以及相關(guān)碳庫(kù)的大小,還改變了植物的碳庫(kù)分配。
[Abstract]:The change of carbon pool in grassland ecosystem plays an important role in the global carbon balance. In recent years, although a large number of independent studies on the effects of grazing on the grassland ecosystem carbon cycle have been carried out on a global scale, the general understanding of the effects of grazing activities on different carbon pools in grassland ecosystems is still widely disputed. In this study, 105 papers on the effects of grazing disturbance on carbon cycle in grassland ecosystem were systematically studied by integrating analysis method. The results showed that grazing activities significantly reduced the size of plant aboveground, underground and related carbon pools, but significantly promoted soil respiration fluxes, and the responses of different types of carbon pools in different climatic zones were significantly different. The reduction of soil carbon pool and underground plant carbon pool were 15.21% and 15.35%, respectively, which were significantly higher than those in arid / semi-arid area, but there was no significant relationship between the aboveground carbon pool and soil carbon pool. The response ratio of soil carbon pool was positively correlated with the annual average precipitation, but negatively correlated with the annual average temperature, and there was a significant positive correlation between the carbon pool and the soil carbon pool, and a significant positive correlation between the soil carbon pool and the soil carbon pool. The response ratio of plant underground carbon pool was negatively correlated with annual average precipitation and annual average temperature, and grazing activities not only significantly reduced the size of plant aboveground, underground and related carbon pools, but also changed the carbon pool allocation of plants.
【作者單位】： 江蘇大學(xué)現(xiàn)代農(nóng)業(yè)裝備與技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室;華東師范大學(xué)生態(tài)與環(huán)境科學(xué)學(xué)院;中國(guó)科學(xué)院地球化學(xué)研究所環(huán)境地球化學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：中國(guó)科學(xué)院“百人計(jì)劃”擇優(yōu)項(xiàng)目 國(guó)家自然科學(xué)基金(31070365) 江蘇省高校優(yōu)勢(shì)學(xué)科[蘇政辦(2014)37號(hào)]資助
【分類號(hào)】：S812

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