川北山区坡耕地侵蚀耕作对土壤团聚体碳的影响
Tillage Erosion Impacts on Soil Aggregate Associated Carbon in Mountainous Region Slope Farmland of Northern Sichuan
查看参考文献24篇
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文摘
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为更好地了解耕作侵蚀对坡耕地土壤碳循环的影响,采用~(137)Cs示踪技术研究了川北山区坡耕地土壤再分配对土壤有机碳和团聚体有机碳含量与储量的影响。结果表明:与该区土壤~(137)Cs有效背景值比较,短坡耕地上坡部位(坡顶、坡肩)土壤中~(137)Cs含量降低了76.91%,而下坡部位(坡脚、坡趾)增加了24.02%;坡耕地上坡部位发生土壤损失,耕作侵蚀平均速率为63.22 t/(hm~2?a),占土壤总侵蚀的94.61%,耕作导致下坡土壤沉积,平均沉积速率为23.94 t/(hm~2?a)。上坡土壤中大于2 000 μm、250~2 000 μm和53~250 μm的团聚体所占比例显著低于下坡,而小于53 μm的团聚体所占比例则相反;土壤及不同粒级团聚体的有机碳含量与储量下坡显著高于上坡。土壤和不同粒级团聚体的有机碳含量与~(137) Cs面积浓度呈极显著正相关关系,说明侵蚀引起土壤再分配造成上坡有机碳含量贫瘠,而下坡相对富集。因此,川北山区坡耕地施肥管理应关注土壤质量空间变异特征。 |
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其他语种文摘
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In order to better understand the effects of tillage erosion on carbon cycle in the sloping farmland, responses of soil organic carbon and aggregate associated carbon to soil erosion were explored in a mountainous region of northern Sichuan Basin, southwest China, with ~(137)Cs tracer and laboratory analysis method. The results showed soil loss was found in upslope where ~(137)Cs concentrations were lower (soil erosion rates were greater), whereas soil deposit occurred in the bottom of sloping farmland where ~(137)Cs concentrations were higher (soil erosion rates were less). Not only water erosion but also tillage erosion contributed to soil losses. Tillage erosion played an important role in sloping farmland soil redistribution, average tillage erosion rate in upslope was 63.22 t/(hm~2?a), occupying 94.61% of total soil erosion. Soil deposit rate was 23.94 t/(hm~2?a)in low positions. Soil erosion resulted in the lowest >2 000 μm, 250~2 000 μm and 53~250 μm size aggregates, and created the highest <53 μm aggregate fraction in upslope. Meanwhile, soil organic carbon and aggregate associated carbon content and stock were significantly lower in upslope positions than these in bottom slope positions. There was significant correlation between soil organic carbon, content of aggregate associated carbon and ~(137)Cs inventory, suggesting that soils were more fertile in bottom positions than in top positions due to soil redistribution by soil erosion. Therefore, fertilization management strategies should involve spatial variation of soil properties in purple soil of hilly sloping farmland. |
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来源
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农业机械学报
,2015,46(11):157-164 【核心库】
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DOI
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10.6041/j.issn.1000-1298.2015.11.022
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关键词
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川北山区
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耕作侵蚀
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土壤团聚体
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碳含量与储量
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坡耕地
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地址
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中国科学院水利部成都山地灾害与环境研究所, 成都, 610041
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四川省农业科学院土壤肥料研究所, 成都, 610066
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-1298 |
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学科
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农业基础科学 |
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基金
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国家973计划
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文献收藏号
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CSCD:5572228
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参考文献 共
24
共2页
|
|
1.
Pan G. The role of soil organic matter in maintaining the productivity and yield stability of cereals in China.
Agriculture, Ecosystems & Environment,2009,129(1/3):344-348
|
被引
31
次
|
|
|
|
|
2.
Lal R. Soil carbon sequestration impacts on global climate change and food security.
Science,2004,304:1623-1627
|
被引
887
次
|
|
|
|
|
3.
Lu S G. Role of organic matter in formation and stability of aggregates in mulberry plantation soils.
Pedosphere,2011,11(2):185-188
|
被引
2
次
|
|
|
|
|
4.
花可可. 长期施肥对紫色土旱坡地团聚体与有机碳组分的影响.
农业机械学报,2014,45(10):167-174
|
被引
14
次
|
|
|
|
|
5.
窦森. 土壤团聚体中有机质研究进展.
土壤学报,2011,48(2):412-418
|
被引
149
次
|
|
|
|
|
6.
Zhang J H. Dual roles of tillage erosion in lateral SOC movement in the landscape.
European Journal of Soil Science,2012,63(2):165-176
|
被引
12
次
|
|
|
|
|
7.
Six J. Soil macroaggregate turnover and microaggregate formation: a mechanism for C sequestration under no-tillage agriculture.
Soil Biology and Biochemistry,2000,32(14):2099-2103
|
被引
373
次
|
|
|
|
|
8.
彭新华. 土壤有机碳库与土壤结构稳定性关系的研究进展.
土壤学报,2004,41(4):618-623
|
被引
177
次
|
|
|
|
|
9.
方华军. 东北黑土区坡耕地表层土壤颗粒有机碳和团聚体结合碳的空间分布.
生态学报,2006,26(9):2847-2854
|
被引
46
次
|
|
|
|
|
10.
李鉴霖. 土地利用方式对缙云山土壤团聚体稳定性及其有机碳的影响.
环境科学,2014,35(12):4695-4704
|
被引
96
次
|
|
|
|
|
11.
唐晓红. 保护性耕作对丘陵区水稻土团聚体稳定性的影响.
农业工程学报,2009,25(11):49-54
|
被引
17
次
|
|
|
|
|
12.
王亮. 不同施肥条件下微生物对棕壤团聚体和碳分布的影响.
农业机械学报,2012,43(3):57-61
|
被引
4
次
|
|
|
|
|
13.
苏正安. 紫色土坡耕地土壤物理性质空间变异对土壤侵蚀的响应.
农业工程学报,2009,25(5):54-60
|
被引
21
次
|
|
|
|
|
14.
Du Z L. Long-term manure amendments enhance soil aggregation and carbon saturation of stable pools in North China Plain.
Journal of Integrative Agriculture,2014,13(10):2276-2285
|
被引
11
次
|
|
|
|
|
15.
解丽娟. 长期不同施肥下黑土与灰漠土有机碳储量的变化.
植物营养与肥料学报,2012,18(1):98-105
|
被引
16
次
|
|
|
|
|
16.
李富程.
土壤侵蚀作用下不同坡位碳氮磷深度成层性研究,2013
|
被引
1
次
|
|
|
|
|
17.
周振方. 长期传统耕作对土壤团聚体稳定性及有机碳分布的影响.
干旱地区农业研究,2012,30(6):145-151
|
被引
8
次
|
|
|
|
|
18.
Zhang J H. Stocks and dynamics of SOC in relation to soil redistribution by water and tillage erosion.
Global Change Biology,2006,12(10):1834-1841
|
被引
22
次
|
|
|
|
|
19.
郭志民. 土壤侵蚀与恢复重建对土壤性质的影响.
福建水土保持,1999,11(2):49-51
|
被引
6
次
|
|
|
|
|
20.
苏正安. 耕作侵蚀及其对土壤肥力和作物产量的影响研究进展.
农业工程学报,2007,23(1):272-278
|
被引
12
次
|
|
|
|
|
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