| 地面覆盖对核桃园土壤团聚体分布及其化学计量特征的影响 |
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| 引用本文： | 孙 萌,梁曼曼,李 寒,李保国,齐国辉,张雪梅.地面覆盖对核桃园土壤团聚体分布及其化学计量特征的影响[J].水土保持学报,2017,31(4):127-134. |
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| 作者姓名： | 孙 萌 梁曼曼 李 寒 李保国 齐国辉 张雪梅 |
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| 作者单位： | 1. 河北农业大学林学院/河北省林木种质资源与森林保护重点实验室,河北保定,071000;2. 河北农业大学林学院/河北省林木种质资源与森林保护重点实验室,河北保定071000;河北省核桃工程技术研究中心,河北临城054300 |
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| 基金项目： | 国家林业行业公益专项(201504408)，河北省科技支撑计划项目(16236810D) |
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| 摘 要： | 为探明地面覆盖对核桃园土壤团聚体特征的影响,研究了地面覆盖后核桃园土壤的微团聚体分布、大团聚体分布及大团聚体化学计量特征。结果表明:在20—40cm土层,覆盖有机肥处理的10~150μm粒径的微团聚体百分含量为84.52%,较对照提高了3.7%;1~5mm粒径的大团聚体百分含量为47.74%,较对照提高了56.8%;5mm粒径的大团聚体百分含量为33.04%,较对照降低了49.5%。覆盖处理显著提高了土壤全效养分含量,在0—20cm土层,覆盖有机肥处理的所有径级团聚体全氮、全磷、总有机碳含量均值分别为1.04,0.81,14.39g/kg,为对照的2.9,5.1,1.4倍;覆盖碎木屑处理的所有径级团聚体全氮、全磷、总有机碳含量均值分别为0.61,0.32,7.42g/kg,为对照的1.7,1.0,2.3倍。覆盖处理在不同程度上提高了土壤团聚体的C/N、C/P和N/P,覆盖有机肥处理的土壤团聚体C/N、C/P和N/P的变化范围分别为8.29~22.65,4.45~27.18,0.44~1.89,而覆盖碎木屑处理的变化范围分别为4.09~29.60,5.32~59.88,1.04~3.29,对照为4.71~12.24,10.08~25.42,0.86~3.10。综上可知,地面覆盖显著提高了较大团聚体百分含量,显著降低了微团聚体百分含量和5mm径级的团聚体百分含量,不同程度提高了各粒径团聚体的有机碳、全氮、全磷含量、C/N和C/P。
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| 关 键 词： | 地面覆盖 核桃园 土壤团聚体 化学计量特征 |
Effects of Mulching on Soil Aggregate Distribution and Stoichiometry in Walnut Orchard |
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| SUN Meng,LIANG Manman,LI Han,LI Baoguo,QI Guohui,ZHANG Xuemei.Effects of Mulching on Soil Aggregate Distribution and Stoichiometry in Walnut Orchard[J].Journal of Soil and Water Conservation,2017,31(4):127-134. |
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| Authors: | SUN Meng LIANG Manman LI Han LI Baoguo QI Guohui ZHANG Xuemei |
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| Institution: | ege of Forestry, Agricultural University of Hebei/Key Lab of Genetic Resource of Forest and Forest Protection of Hebei Province, Baoding, Hebei 071000;2.Research Center for Walnut Engineering and Technology of Hebei, Lincheng, Hebei 054300 |
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| Abstract: | To confirm the effects of mulching on soil aggregate characteristics,the distribution of microaggregate and macro-aggregate and also stoichiometry of macro-aggregate were explored.In the 20-40 cm soil layer mulched with manure,the percentage of the 10～150 μm micro-aggregate was 84.5％,which was 3.7％ higher than control,while the percentages of the 1～5 mm macro-aggregate and the ＞5 mm macroaggregate were 47.74％ and 33.04％,respectively,and the corresponding changes were 56.8％ and 49.5％ compared with control.In the 0-20 cm soil layer,total N,total P,TOC of all soil aggregates mulched with manure were,on average,1.04,0.81 and 14.39 g/kg,respectively,which were 2.9,5.1,1.4 times that measured in control,and the corresponding values under treatment with wood chips were 0.61,0.32,and 7.42 g/kg,respectively,which were 1.7,1.0,2.3 times that measured in control.The C/N,C/P,N/P ranges of soil aggregate mulched with manure were 8.29～22.65,4.45～27.18 and 0.44～1.89,respectively,and the ranges of that of wood chips were 4.09～29.60,5.32～59.88 and 1.04～3.29,respectively,while the control were 4.71～12.24,10.08～25.42 and 0.86～3.10,respectively.In all,mulching promotes the percentage of the 1～5 mm macro-aggregate and weaken the ＞5 mm macro-aggregate and micro-aggregate.Moreover,the total N,P,TOC and C/N,C/P of the soil aggregates were all increased in degree with muchling. |
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| Keywords: | mulching walnut soil aggregates stoichiometry |
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