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当前位置: 首页 > 文章 > 辽西北半干旱区典型人工林土壤C,N,P的垂直分布特征 沈阳农业大学学报 2016,47 (4) 418-424
Position: Home > Articles > The Vertical Distribution of Soil Carbon, Nitrogen and Phosphorus for Typical Plantations in the Semi-arid Areas of Northwest Liaoning Journal of Shenyang Agricultural University 2016,47 (4) 418-424

辽西北半干旱区典型人工林土壤C,N,P的垂直分布特征

作  者：
周永斌;郭鑫炜;魏亚伟;王茜;李吉;李志远;郑卓然
单  位：
辽宁辽河平原森林生态系统定位研究站;沈阳农业大学林学院
关键词：
半干旱区;人工防护林;土壤有机碳;土壤养分;土壤碳氮比
摘  要：
辽西北半干旱区作为我国三北防护林边界防护带的重要组成部分,生态环境脆弱而敏感,但对于阻挡科尔沁沙地南缘扩大和在生态修复中起着重要作用;为明确其土壤养分、有机碳含量及其垂直分布特征,本研究在辽宁西北部的昌图县付家林场,分别选择当地典型的人工防护林——樟子松纯林、杨树纯林、樟子松-杨树混交林,并对其土壤中有机碳、全氮、全磷含量及分布特征进行研究。结果表明:表层土壤(0~10cm)有机碳和全氮含量的变化范围分别为2.86~9.04g·kg-1和0.35~0.78g·kg-1,均存在显著差异,且均以樟子松林最高,樟子松-杨树混交林最低;土壤全磷含量仅为1.14~4.50mg·kg-1,樟子松-杨树混交林显著低于樟子松林和杨树林,这可能与当地的放牧行为有关。垂直方向上(0~50cm),土壤有机碳、全氮和全磷含量均随土层深度的增加而下降,但下降幅度显著不同(p<0.05),其中樟子松林(土壤有机碳和全氮分别为46%和33%)显著小于杨树林(土壤有机碳和全氮分别为52%和47%)和樟子松-杨树混交林(土壤有机碳和全氮分别为62%和49%)。综上所述,3种林分对表层土壤有机碳、全氮和全磷均有较好的积聚作用,但在垂直剖面上,樟子松林对土壤有机碳和养分的积累更加明显。
译  名：
The Vertical Distribution of Soil Carbon, Nitrogen and Phosphorus for Typical Plantations in the Semi-arid Areas of Northwest Liaoning
作  者：
ZHOU Yong-bin;GUO Xin-wei;WEI Ya-wei;WANG Xi;LI Ji;LI Zhi-yuan;ZHENG Zhuo-ran;College of Forestry, Shenyang Agricultural University;Research Station of Liaohe River Plain Forest Ecosystem CFERN;College of Forestry, Inner Mongolia Agricultural University;
关键词：
semi-arid region;;artificial shelterbelt;;soil organic carbon;;soil nutrient;;soil C/N
摘  要：
The semi-arid area of Northwest Liaoning, with fragile and sensitive ecological environment, is an important part of the Three-North Shelterbelt boundary protection zone, which plays an important role in the local ecological restoration and keeping the southern edge of Horqin sandy land from expanding. In order to quantify its characteristics and vertical distributions of soil organic carbon(SOC) and nutrients, this study selected the sample plots in three typical local artificial shelterbelt-Pinus sylvestris var. mongolica(Ps) plantation, Populus × euramericana(PX) plantation, Pinus sylvestris var. mongolica- Populus X euramericana mixed plantation(Ps-PX plantation) in the Fujia Forest Farm, Northwest Liaoning. Then, soil samples of these three typical plantations were tested for its organic carbon, nitrogen and phosphorus, and their vertical distribution characteristics were summarized, respectively. Results showed that the soil organic carbon and total nitrogen(TN) in the top-layer soil(0-10cm)were significantly different in the three plantations, constituting 2.86-9.04g·kg-1and 0.35-0.78g·kg-1, respectively. The highest value was in Ps plantation, while the lowest value was in Ps-PX plantation. Soil total phosphorus(TP) contents were much lower with a range of 1.14-4.50mg·kg-1. The TP in Ps-PX plantation was significantly lower than those of both Ps plantation and PX plantation due to the local grazing behavior activities. On the vertical profile(0-50cm), SOC, TN and TP all decreased significantly with the increasing of soil depth(p<0.05). The SOC and TN in Ps plantation(46% and 33%) were significantlylower than those of PX plantation(52% and 47%) and Ps-PX plantation(62% and 49%). In summary, the three typical plantations take effects in increasing SOC, TN and TP in the top-layer soils, whereas P. sylvestris var. mongolica plantation played more obvious effects in the vertical soil profiles.

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