| 不同开垦年限黑土有机质变化的研究 |
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| 引用本文： | 辛刚,颜丽,汪景宽,关连珠. 不同开垦年限黑土有机质变化的研究[J]. 土壤通报, 2002, 33(5): 332-335 |
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| 作者姓名： | 辛刚 颜丽 汪景宽 关连珠 |
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| 作者单位： | 沈阳农业大学土壤肥力研究室,辽宁,沈阳,110161 |
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| 基金项目： | 国家重点基础研究发展规划项目(G1999011810) |
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| 摘 要： | 本试验研究了不同开垦年限黑土有机碳的数量、组成、结合形态的变化 ,试验研究结果表明 :垦后黑土 0～2 0cm土层土壤有机碳数量不断下降 ,年有机碳矿化速率为 1 72 % ,达到平衡后有机碳数量为 7 2 7g/kg ,土壤有机碳的H/F比升高 ,氧化稳定性增强 ,土壤有机—无机复合度升高 ,土壤有机碳松紧比下降。 2 0～ 40cm土层土壤有机碳在垦后 2 2年内升高 ,以后又下降 ,土壤H/F比无显著变化规律 ,土壤有机质氧化稳定性提高 ,土壤有机—无机复合度下降 ,土壤松紧比下降
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| 关 键 词： | 黑土 有机质 |
| 文章编号： | 0564-3945(2002)05-0332-04 |
| 修稿时间： | 2001-07-12 |
Changes of Organic Carbon in Black Soils with the Different Reclamation Years |
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| XIN Gang,YAN Li,WANG Jing huan,GUAN Lian zhu. Changes of Organic Carbon in Black Soils with the Different Reclamation Years[J]. Chinese Journal of Soil Science, 2002, 33(5): 332-335 |
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| Authors: | XIN Gang YAN Li WANG Jing huan GUAN Lian zhu |
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| Abstract: | The results from the experiment showed that the content of organic C decreased in toplayer (0～20 cm) of black soils after reclamation, with the annual organic C mineralization rate of 1.72%. The organic matter content could reach 7 27g/kg when it is balanced. The H/F ratio of humus rose and the oxidation stability strengthened. The degree of organo-mineral complex also increased, but the ratio of loose to tight humus fractions decreased. In the 20～40cm soil layer, the organic C content increased after 22 years reclamation, and then decreased. The humus oxidation stability strengthened, while the degree of organo mineral complex and the ratio of loose to tight humus decreased. |
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| Keywords: | Black soil Organic carbon |
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