摘要
为探讨毛乌素沙地东南缘樟子松(Pinus sylvestris var.mongolica)人工林下土壤粒度特征,以陕西省榆林市横山区、榆阳区和神木市樟子松人工林0~200cm土层为对象,测定土壤粒度组成,分析土壤粒度参数。结果表明:(1)毛乌素东南缘樟子松人工林土壤机械组成主要为细砂(34.73%~44.57%)和中砂(40.63%~50.28%),粗粉砂含量(0.27%~1.34%)最低。(2)平均粒度介于细砂和中砂(1.81~2.20Φ),分选系数较好至中等(0.63~0.76),偏度近对称至正偏(0.03~0.13),峰度中等(0.94~1.07)。(3)空间上,0~200cm土层平均粒径自东北向西南逐渐变细且差异显著,分选系数、偏度和峰度在0~60cm内无规律,60~200cm土层有规律,即自东北向西南分选变差、细粒物质增加、粒度频率曲线变窄,但变化不显著。深度上,各参数无统一变化规律,但0~30cm土层比30~60cm平均粒径小,分选变差,细粒物质增加,粒度频率曲线变窄。(4)樟子松林和土壤间的相互作用在0~30cm较其他深度显著。
In order to explore soil grain-size characteristics under the Pinus sylvestris var.mongolica,soil samples,containing seven depths（0-200 cm）,under the P.sylvestris var.mongolica were studied in three districts of Hengshan,Yuyang and Shenmu in Yulin City,Shaanxi Province.We measured the physical component of soil grain and analyzed the soil grain size parameters.Results show that：（1）Soil grain size are mainly occupied by fine sand（34.73%-44.57%）and middle sand（40.63%-50.28%）,and the coarser sediment content（0.27%-1.34%）is the lowest under P.sylvestris var.mongolica plantations in the southeast Mu Us Sandy Land.（2）The mean grain size of the soil ranges from fine sand to middle sand（1.81-2.20Φ）,the sorting coefficient ranges from better sorting to middle sorting（0.63-0.76）,the skewness ranges from near symmetrical to positive bias（0.03-0.13）,and the kurtosis is medium（0.94-1.07）.（3）In space,the mean grain size of the soil at the depth of 0-200 cm becomes fine gradually and shows significant difference from the northeast to the southwest;while for other soil grain size parameters,no uniform rule exist for the soil at the depth of 0-60 cm,but the soil at the depth of 60-200 cm have a uniform and nonsignificant rule,which contains that the worse sorting,the increased fine particles,and the narrowed grain size frequency curve from the northeast to the southwest.In depth,there is no uniform rule for the soil grain size parameters at the depth of 0-200 cm.However,in comparison to the soil of 0-30 cm,the soil of 30-60 cm has the finer mean grain size,the worse sorting,finer particle and the narrower grain size frequency curve.（4）The interaction between the plant and the soil is significant at the depth of 0-30 cm compared with other depths.
作者
杨军怀
董治宝
南维鸽
宋绍鹏
肖南
刘生权
孟小强
Yang Junhuai;Dong Zhibao;Nan Weige;Song Shaopeng;Xiao Nan;Liu Shengquan;Meng Xiaoqiang(a.School of Geography and Tourism/b.National Experimental Teaching Demonstration Center of Geography Science（Shaanzci Normal University）,Shaanxi Normal University,Xi ＇an 710119,China;Green Office of Yulin Municipali ty,Yulin 719000,Shaanxi,China)
出处
《中国沙漠》
CSCD
北大核心
2018年第4期815-822,共8页
Journal of Desert Research
基金
中国博士后基金项目(2017M613049)
中央高校基本科研业务费专项(GK201703050)
德国政府贷款陕西榆林长城沿线沙地治理及生物多样性保护项目(H152041008)
