不同种植年限下玉米田淡灰钙土有机碳组分变化特征研究
为研究种植玉米对淡灰钙土有机碳及其组分的影响,以红寺堡不同种植年限的淡灰钙土为研究对象,用物理-化学联合分组方法研究了土壤全碳和有机碳不同组分随种植年限的变化。结果表明：淡灰钙土全碳含量最高为20.12 g.kg-1,有机碳含量最高为8.84 g.kg-1,与碳饱和相距甚远；土壤全碳和有机碳随着种植年限的增加,短期内呈现一种上下波动的曲线,全碳呈现上升趋势,有机碳呈现下降趋势。游离态颗粒有机碳含量最高,其次为物理保护有机碳,然后为化学保护有机碳,生物化学保护有机碳所占比例最小,粗颗粒组分有机碳与种植年限(1-10a)呈负相关,细颗粒组分有机碳与种植年限(1-10a)呈正相关。
英文摘要:
Study on soil organic carbon and light sierozems cultivation of corn field, the influence of soil organic carbon in HongSiPu different cultivating year of light sierozems as the research object, the method of physical-chemical fractionation was conducted in ligtht sierozems to study the changes of soil organic carbon along with the cultivating year. The results suggests that the total carbon of light sierozems soil content up to 20.12 g.kg-1, The organic carbon content up to 8.84 g.kg-1, it saturated with carbon far apart; Total carbon and organic carbon in soil increased with increasing years of planting, present a curve fluctuates up and down in the short term, but in the long run, all carbon has a rising trend, organic carbon has a downward trend. Free particles of organic carbon content is the highest, followed by the physical protection of organic carbon, and organic carbon for chemical protection, protect the minimum proportion of organic carbon, biochemistry components of fine particulate organic carbon, coarse particulate organic carbon component and cultivation year(1-10a)was negatively correlated but the fine particle is opposite.
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