Effects of long-term different fertilization on soil aggregates and organic carbon fractions on sloping upland of purple soil

被引：0
|
作者：
Hua, Keke [1 ]
Zhu, Bo [2 ]
Yang, Xiaolin [3 ]
Wang, Xiaoguo [2 ]
机构：
[1] Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei
[2] Institute of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu
[3] Safety and Emergency Management Research Center, Henan Polytechnic University, Jiaozuo
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2014年 / 45卷 / 10期
关键词：
Long-term fertilization; Particulate organic matter; Purple soil; Sloping upland; Soil aggregates;
D O I：
10.6041/j.issn.1000-1298.2014.10.026
中图分类号：
学科分类号：
摘要：
Long-term fertilization has a significant impact on soil organic carbon (SOC) stock. However, fertilization impact on physical fractions of SOC is still poorly understood on sloping upland of purple soil in the central Sichuan Basin, southwestern China. Therefore, this study assessed the impact of long-term different fertilization on soil aggregates distribution and its organic carbon factions under an intensive wheat (Triticum Aestivium L.)-maize (Zea mays L.) cropping system through four fertilization treatments, no fertilizer (CK), applied mineral fertilizer (NPK), pig manure matched with mineral fertilizer (OMNPK), and crop straw residue matched with mineral fertilizer (RSDNPK). Soil samples from 0~20 cm soil layer were separated into four soil aggregations (>2 mm large macroaggregates-LM, 0.25~2 mm small macroaggregates-SM, <0.25 mm microaggregates-M and <0.053 mm slit-clay microaggregates-SC) by using wet sieving method. LM and SM were further separated into particulate organic matter (POM), microaggregates (mM) and the silt-plus-clay fraction (SC). The results showed that the mass percent, organic carbon content and contribution of LM and SM under organic amendments combined with mineral fertilizer (OMNPK and RSDNPK) were significantly increased compared with NPK treatment, indicating that SOC was enriching towards larger soil aggregates under long-term application of organic fertilizer. Furthermore, organic carbon content and storage of POM, mM and SC in large aggregates were significantly enhanced by OMNPK and RSDNPK treatment. In comparison with NPK treatment, OMNPK and RSDNPK treatments significantly increased contributions of POM while decreased contribution of SC in large soil aggregates. The results also showed that it was greatly helpful to enhance POM sequestration and accumulation in large aggregates by long-term application of organic fertilizer. Additionally, the soil organic carbon storage in the whole soil and larger aggregates were dominated by SC fraction, which was helpful to enhance organic carbon sequestration, especially for crop straw return practice on sloping upland of purple soil.
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页码：167 / 174
页数：7
相关论文
共 27 条
  • [1] Liu E., Zhao B., Mei X., Et al., Distribution of water-stable aggregates and organic carbon of arable soils affected by different fertilizer application, Acta Ecologica Sinica, 30, 4, pp. 1035-1041, (2010)
  • [2] Mikha M.M., Rice C.W., Tillage and manure effect on soil and aggregate-associated carbon and nitrogen, Soil Science Society of America Journal, 68, 3, pp. 809-816, (2004)
  • [3] Peng X., Zhang B., Zhao Q., A review on relationship between soil organic carbon pools and soil structure stability, Acta Pedologica Sinica, 41, 4, pp. 618-623, (2004)
  • [4] Six J., Elliott E.T., Paustian K., Soil macroaggregate turnover and microaggregate formation: a mechanism for C sequestration under no-tillage agriculture, Soil Biology and Biochemistry, 32, 14, pp. 2099-2103, (2000)
  • [5] Garten C.T., Post W.M., Hanson P.J., Et al., Forest soil carbon inventories and dynamics along an elevation gradient in the southern Appalachian Mountains, Biogeochemistry, 45, 2, pp. 115-145, (1999)
  • [6] Bronick C.J., Lal R., Manuring and rotation effects on soil organic carbon concentration for different aggregate size fractions on two soils in northeastern Ohio, USA, Soil and Tillage Research, 81, 2, pp. 239-252, (2005)
  • [7] Chung H., Kathie J.N., Alain P., Evidence for carbon saturation in a highly structured and organic-matter-rich soil, Soil Science Society of America Journal, 74, 1, pp. 130-138, (2010)
  • [8] Wei X.R., Qiu L.P., Shao M.A., Et al., The accumulation of organic carbon in mineral soils by afforestation of abandoned farmland, PLoS ONE, 7, 3, (2012)
  • [9] Tong X.G., Xu M.G., Wang X.J., Et al., Long-term fertilization effects on organic carbon fractions in a red soil of China, Catena, 113, pp. 251-259, (2013)
  • [10] He N.P., Yu Q., Wang R.M., Et al., Enhancement of carbon sequestration in soil in the temperature grasslands of northern China by addition of nitrogen and phosphorus, PLoS ONE, 8, 10, (2013)
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