崇明岛深层土壤有机碳空间分布及碳储存特征分析

发布时间：2018-05-18 15:43

本文选题：崇明岛 + m深度土壤　；参考：《中国农业气象》2017年09期

【摘要】：对上海崇明岛开展5种不同种植类型(粮田、菜田、果园、生态林和湿地)1m深度土壤的碳普查,应用地统计方法分析其深层土壤有机碳含量的空间分布特征,研究不同种植类型对土壤有机碳分布和储存的影响,探明土壤碳循环规律。结果表明,崇明岛深层土壤平均有机碳含量为3.94g·kg~(-1),不同深度土壤有机碳含量在8.73~1.72g·kg~(-1),有机碳储量在2.30~0.47×10~6t,耕层土壤(0-40cm)有机碳储量占总量的65.14%。不同深度土层(0-20、20-40、40-60、60-80和80-100cm)有机碳含量空间分布图表明,各层土壤有机碳含量分布特征大致相同,仅湿地土壤有机碳含量在60cm深度以下相对其它种植类型有所提高。种植类型对深层土壤有机碳分布影响显著,土壤有机碳密度大小表现为菜田粮田果园湿地生态林,土壤有机碳储量则表现为粮田湿地生态林菜田果园。
[Abstract]:Five different planting types (grain field, vegetable field, orchard, ecological forest and wetland) were carried out in Chongming Island, Shanghai. The spatial distribution characteristics of organic carbon content in deep soil were analyzed by means of geostatistics. The effects of different planting types on the distribution and storage of soil organic carbon were studied. The results showed that the average organic carbon content in the deep soil of Chongming Island was 3.94 g / kg ~ (-1) C ~ (-1), the soil organic carbon content was 8.73 ~ 1.72 g / kg ~ (-1) C ~ (-1), the organic carbon storage was 2.30 ~ 0.47 脳 10 ~ (6) t, and the content of organic carbon in the topsoil was 0-40 cm). The spatial distribution chart of soil organic carbon content in different soil layers (0-20 ~ 20 ~ 40 ~ 40 ~ 60 ~ (60 ~ 80) and 80 ~ 100 cm) shows that the distribution characteristics of soil organic carbon content in different layers are approximately the same, but the soil organic carbon content in wetland soil is higher than that of other planting types below the depth of 60cm. The distribution of organic carbon in deep soil was significantly affected by planting type. The density of soil organic carbon was shown as vegetable field grain field orchard wetland ecological forest and soil organic carbon storage as grain field wetland ecological forest vegetable field orchard.
【作者单位】：上海市农业科学院生态环境保护研究所;崇明县农业技术推广中心;上海交通大学低碳农业中心;
【基金】：国家自然科学基金项目(41501259) 上海市科委基础研究领域项目(13JC1404800)
【分类号】：S153.6

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