| 晋西北黄土高原丘陵区不同土地利用方式下土壤碳氮储量 |
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| 引用本文： | 董云中,王永亮,张建杰,张强,杨治平.晋西北黄土高原丘陵区不同土地利用方式下土壤碳氮储量[J].生态学杂志,2014,25(4):955-960. |
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| 作者姓名： | 董云中 王永亮 张建杰 张强 杨治平 |
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| 作者单位： | (山西省农业科学院农业环境与资源研究所， 山西省土壤环境与养分资源重点实验室, 太原 030006) |
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| 摘 要： | 对晋西北黄土高原丘陵区杨树-小叶锦鸡儿人工林、小叶锦鸡儿人工灌丛、杨树人工林、撂荒地和农田5种土地利用方式下土壤碳氮储量进行研究.结果表明: 不同土地利用方式下土壤碳氮含量、碳氮密度和碳氮储量存在显著差异.5种土地利用方式0～20 cm表层土壤碳氮含量和碳氮密度均显著大于20～40 cm和40～60 cm土层.5种土地利用方式同一土层碳氮含量和碳氮密度大小为: 杨树-小叶锦鸡儿人工林>小叶锦鸡儿人工灌丛>杨树人工林>撂荒地>农田;0～60 cm土层土壤有机碳储量大小为:杨树-小-叶锦鸡儿人工林(30.09 t·hm-2)>小叶锦鸡儿人工灌丛(24.78 t·hm-2)>杨树人工林(24.14 t·hm-2)>撂荒地(22.06 t·hm-2)>农田(17.59 t·hm-2);土壤氮储量与有机碳储量变化规律相似,杨树-小叶锦鸡儿人工林0～60 cm土层土壤氮储量(4.94 t·hm-2)最高,其次是小叶锦鸡儿人工灌丛(3.53 t·hm-2)、杨树人工林(3.51 t·hm-2)和撂荒地(3.40 t·hm-2),农田土壤氮储量(2.71 t·hm-2)最低.杨树-小叶锦鸡儿人工林和小叶锦鸡儿人工灌丛是晋西北黄土高原丘陵区植被建设和生态恢复过程中较好的两种土地利用方式.
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| 关 键 词： | 土地利用方式 土壤碳氮含量 土壤碳氮储量 黄土高原 |
Soil carbon and nitrogen storage of different land use types in northwestern Shanxi Loess Plateau. |
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| Institution: | (Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Institute of Agriculture Environment and Resources Research, Shanxi Academy of Agricultural Sciences, Taiyuan 030006, China) |
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| Abstract: | The soil organic carbon (SOC) and total nitrogen (TN) storage under five different land use patterns, i.e., poplar and Caragana microphylla plantation, C. microphylla artificial shrubland, poplar plantation, bare land and cropland were studied in the hilly Loess Plateau of northwestern Shanxi. The results showed that the contents, densities and storage of SOC and TN varied remarkably under the different land use patterns. Soil carbon and nitrogen contents and storage in the 0-20 cm soil layer were significantly higher in the 20-40 cm and 40-60 cm soil layers under each of the five land use patterns. In the same soil layer, the contents and densities of SOC and TN under the five land use patterns were in the order of poplar and C. microphylla plantation > C. microphylla artificial shrubland > poplar plantation > bare land > cropland. The SOC storage in the 0-60 cm soil layer was in the order of poplar and C. microphylla plantation (30.09 t·hm-2) > C. microphylla artificial shrubland (24.78 t·hm-2) > poplar plantation (24.14 t·hm-2) > bare land (22.06 t·hm-2) > cropland (17.59 t·hm-2). Soil TN storage had the same trend as SOC storage, and TN storage in the 0-60 cm soil layer was the highest (4.94 t·hm-2) in poplar and Caragana microphylla plantation, followed by C. microphylla artificial shrubland (3.53 t·hm-2), poplar plantation (3.51 t·hm-2), bare land (3.40 t·hm-2), and cropland (2.71 t·hm-2). Poplar and C. microphylla plantation and C. microphylla artificial shrubland were the good land use patterns in the process of vegetation construction and ecological restoration in the hilly Loess Plateau of northwestern Shanxi. |
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| Keywords: | land use type soil carbon and nitrogen content soil carbon and nitrogen storage Loess Plateau |
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