梯田不同作物土壤有机碳含量及其影响因素分析

发布时间：2019-02-24 12:23

【摘要】：以赤峰市敖汉旗水平梯田土壤为研究对象,选取玉米、谷子、高粱、绿豆4种当地多年主栽作物的表层(0~20 cm)土壤216个样品,通过方差分析方法探究梯田4种作物表层土壤有机碳含量的差异及其影响因素。结果表明,研究区梯田表层土壤有机碳含量平均值为6.34 g/kg,处于中等偏下水平。不同作物土壤有机碳含量由高到低表现为绿豆谷子高粱玉米。在0.01显著性水平下,绿豆地土壤有机碳含量显著高于玉米、高粱、谷子地(P=0.000 6)。玉米、高粱、绿豆地土壤有机碳含量均随坡位的上升而减少,谷子则相反。4种作物土壤有机碳含量大小在两个坡向上都表现为阴坡阳坡。下坡位以及阴坡的土壤有机碳含量比较高。人为因素是通过不同的耕作制度和管护措施来影响梯田土壤有机碳含量的,免耕、秸秆还田、绿豆种植等措施能提高梯田土壤有机碳含量。
[Abstract]:Taking the horizontal terrace soil of Aohan Banner of Chifeng City as the research object, 216 soil samples of maize, millet, sorghum and mung bean were selected. By means of variance analysis, the difference of soil organic carbon content of four crops in terrace and its influencing factors were investigated. The results showed that the average soil organic carbon content of terrace was 6.34 g / kg, which was in the middle level. Soil organic carbon content of different crops from high to low manifested as mung bean millet sorghum corn. The soil organic carbon content in mung bean field was significantly higher than that in corn, sorghum and millet land (P0. 000 6). The soil organic carbon content of maize, sorghum and mung bean fields all decreased with the increase of slope position, while the soil organic carbon content of millet decreased. Soil organic carbon content was higher in downhill and shady slopes. The organic carbon content of terrace soil was affected by different tillage system and management measures, such as no-tillage, straw returning, mung bean planting and so on, which could increase the organic carbon content of terrace soil.
【作者单位】：内蒙古农业大学沙漠治理学院;内蒙古自治区水利水电勘测设计院;
【基金】：内蒙古应用研究与开发计划资助项目(20110732) 国家自然科学基金项目(31500584) 高等学校科学研究项目(NJZZ16055) 内蒙古自然科学基金项目(2016MS0407)
【分类号】：S153.6

【相似文献】