Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.soilbio.2009.10.023 |
Long-term fertilization and manuring effects on physically-separated soil organic matter pools under a wheat-wheat-maize cropping system in an arid region of China | |
Hai, Long1; Li, Xiao Gang1; Li, Feng Min1; Suo, Dong Rang2; Guggenberger, Georg3 | |
通讯作者 | Li, Xiao Gang |
来源期刊 | SOIL BIOLOGY & BIOCHEMISTRY
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ISSN | 0038-0717 |
出版年 | 2010 |
卷号 | 42期号:2页码:253-259 |
英文摘要 | With increasing food demand worldwide, agriculture in semiarid and and regions becomes increasingly important, though knowledge about organic matter (OM) conserving management systems is scarce. This study aimed at examining organic C (OC) and nitrogen (N) concentrations in various soil OM pools affected by 26-years application of chemical fertilizer and farmyard manure at an and site of Gansu Province, China. Macro OM (> 0.05 mm) was extracted by wet sieving and then separated into light macro OM (< 1.8 g cm(-3)) and heavy macro OM (> 1.8 g cm(-3)) sub-fractions; bulk soil was differentiated into free particulate OM (FPOM, < 1.6 g cm(-3)), occluded particulate OM (OPOM, 1.6-1.8 g cm(-3)) and mineral-associated OM (> 1.8 g cm(-3)). OC and N concentrations of heavy macro OM and FPOM were slightly affected by long-term N fertilization alone and its combination with P and K, but their magnitudes of change had not significantly contributed to total soil OC and N concentrations. Farmyard manure increased light macro OC and N by 58 and 70%, heavy macro OC and N by 86 and 117%, free particulate OC and N by 29 and 55%, occluded particulate OC and N by 29 and 55%,and mineral-associated OC and N by 44 and 48%, respectively, compared to nil-manure. Mineral fertilization improved soil OM quality by decreasing C/N ratio in the light macro OM and FPOM fractions where farmyard manure was absent. Organic manure led to a decline of the C/N ratio in all physically-separated OM fractions possibly due to the increased input of processed organic materials. We found about two thirds of macro OM was actually located within 2-0.05 mm organo-mineral associations or/and aggregates. In conclusion, this study stresses the vital importance to apply organic manure to the wheat-corn production system characterized by straw removal and conventional tillage in the region. (C) 2009 Elsevier Ltd. All rights reserved. |
英文关键词 | Long-term fertilization experiment Combined particle size and density soil fractionation Light macro organic fraction Heavy macro organic fraction Coarse mineral-associated fraction Arid region |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000273946300015 |
WOS关键词 | CARBON SEQUESTRATION ; AGRICULTURAL SOILS ; FRACTIONS ; DYNAMICS ; NITROGEN ; QUALITY ; CULTIVATION ; TILLAGE ; INDIA |
WOS类目 | Soil Science |
WOS研究方向 | Agriculture |
来源机构 | 兰州大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/166423 |
作者单位 | 1.Lanzhou Univ, Sch Life Sci, MOE Key Lab Arid & Grassland Ecol, Lanzhou 730000, Peoples R China; 2.Zhangye Inst Agr Sci, Zhangye 734000, Peoples R China; 3.Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany |
推荐引用方式 GB/T 7714 | Hai, Long,Li, Xiao Gang,Li, Feng Min,et al. Long-term fertilization and manuring effects on physically-separated soil organic matter pools under a wheat-wheat-maize cropping system in an arid region of China[J]. 兰州大学,2010,42(2):253-259. |
APA | Hai, Long,Li, Xiao Gang,Li, Feng Min,Suo, Dong Rang,&Guggenberger, Georg.(2010).Long-term fertilization and manuring effects on physically-separated soil organic matter pools under a wheat-wheat-maize cropping system in an arid region of China.SOIL BIOLOGY & BIOCHEMISTRY,42(2),253-259. |
MLA | Hai, Long,et al."Long-term fertilization and manuring effects on physically-separated soil organic matter pools under a wheat-wheat-maize cropping system in an arid region of China".SOIL BIOLOGY & BIOCHEMISTRY 42.2(2010):253-259. |
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