| 两种巨桉人工林地土壤抗蚀性的比较研究 |
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| 引用本文： | 余晓章,魏鹏,范川,王谢,张腾飞,沈卫.两种巨桉人工林地土壤抗蚀性的比较研究[J].水土保持通报,2015,35(2):58-63. |
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| 作者姓名： | 余晓章 魏鹏 范川 王谢 张腾飞 沈卫 |
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| 作者单位： | 四川农业大学林学院,四川雅安,625014 |
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| 基金项目： | 国家“十二五”科技支撑项目“长江上游低山丘陵区生态综合整治技术与示范”(2011BAC09B05);四川省科技支撑计划项目(2010NZ0049) |
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| 摘 要： | 目的]揭示巨桉人工林组培苗和实生苗两种起源对土壤抗蚀性的影响。方法]利用S形采样法在样地内采集多个样点,按上(0—10cm),中(10—20cm),下(20—30cm)三层分别利用环刀和塑料盒采集原状土壤,测定不同层次土壤容重、非毛管孔隙度、毛管孔隙度、总孔隙度、渗透速率、水稳性团聚体含量等。结果](1)随着土壤深度增加,两种巨桉林地土壤容重呈现递增趋势,而总孔隙度和通气孔隙度呈递减趋势。组培巨桉林土壤容重低于实生苗巨桉林地,而土壤总孔隙度、通气孔隙度高于显著实生苗巨桉林地(p0.05);(2)随着土壤深度增加,两种巨桉林地土壤水稳性指数、抗蚀指数、团聚状况、团聚度和结构系数呈现下降趋势,水稳性指数和抗蚀指数达到显著水平(p0.05),而分散率和分散系数呈现升高趋势。组培巨桉林地不同土层的抗蚀指数和结构系数均高于实生苗巨桉林地,但分散系数均显著低于实生苗巨桉林地(p0.05);(3)随着土壤深度增加,两种巨桉林地土壤各粒径水稳性团聚体含量和平均重量直径(MWD)呈现出下降趋势,土壤结构体破坏率呈现上升趋势。组培苗巨桉林地不同土层各粒径(5mm;5~2mm;0.5~0.25mm;0.5mm;0.25mm)水稳性团聚体含量和MWD均高于实生苗林地,而结构体破坏率、2~1mm和1~0.5mm水稳性团聚体含量均低于实生苗巨桉林地。结论]组培巨桉人工林的土壤抗蚀性更佳。
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| 关 键 词： | 土壤抗蚀性 巨桉人工林 组培苗 实生苗 |
| 收稿时间： | 3/6/2014 12:00:00 AM |
| 修稿时间： | 4/4/2014 12:00:00 AM |
Comparative Study of Soil Anti-erodibility Between Two Kinds of Eucalyptus Grandis Plantations |
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| YU Xiaozhang,WEI Peng,FAN Chuan,WANG Xie,ZHANG Tengfei and SHEN Wei.Comparative Study of Soil Anti-erodibility Between Two Kinds of Eucalyptus Grandis Plantations[J].Bulletin of Soil and Water Conservation,2015,35(2):58-63. |
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| Authors: | YU Xiaozhang WEI Peng FAN Chuan WANG Xie ZHANG Tengfei and SHEN Wei |
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| Institution: | YU Xiaozhang;WEI Peng;FAN Chuan;WANG Xie;ZHANG Tengfei;SHEN Wei;College of Forestry,Sichuan Agriculture University; |
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| Abstract: | Objective] To research the effects of two seedlingstissue culture seedling(P1) and seed seedling(P2)] of Eucalyptus grandis plantation on soil anti-erodibility.Methods] Soil samples of 0-10c m, 10-20 cm and 20-30 cm were collected with ring-knife and plastic box to determine the index as soil bulk density, non-capillary porosity, capillary porosity, total porosity, soil aeration porosity and water stable aggregates content, etc.Results] The soil bulk density in the two seedling plantation lands increased at the downward soil profiles, while total porosity and soil aeration porosity decreased with the increase of soil depth. The soil bulk density in P1 was significantly lower than that in P2. The total porosity and soil aeration porosity in P1 were significantly higher than those in P2. Water stable index, soil erosion resistance, aggregate condition, aggregate degree and structure coefficient in the two kinds of plantations decreased with the increase of soil depth, while the soil dispersion rate and dispersion coefficient increased. The water stability and resistance to corrosion index were both significantly different at the 0.05 level. Soil erosion resistance and structure coefficient in P1 were higher than those in P2, while the dispersion coefficient was lower than that in P2. Contents of water-stable aggregate in all size and MWD(mean weight diameter) in both plantations decreased with the increase of soil depth, while soil structure damage rate increased. Contents of water-stable aggregate in different size(>5 mm, 5~2 mm, 0.5~0.25 mm, >0.5 mm, >0.25 mm) and MWDS in P1 were higher than those in P2, while the structure damage rate, and water-stable aggregate in sizes of 2~1 mm and 1~0.5 mm in P1 were lower than those in P2.Conclusion] Soil anti-erodibility in P1 was higher than that in P2, in the present study condition. |
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| Keywords: | soil anti-erodibility Eucalyptus grandis plantation tissue culture seedling seed seedling |
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