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【目的】对克拉玛依荒漠区新建的新疆杨、俄罗斯杨、榆树白腊混交林及外围原有的荒漠风沙土的土壤有机碳含量和生物量进行对比研究,旨在明确荒漠区植树造林对土壤有机碳含量的影响,为土地利用和生态保护提供基础数据。【方法】新建林区与外围原有的荒漠风沙土壤取样分析,对比研究荒漠区新建林和外围原有荒漠土壤总有机碳、活性有机碳、溶解性有机碳、微生物生物量碳含量以及生物量。【结果】新疆杨土、俄罗斯杨土、榆树白腊混交林土及荒漠风沙土0~50 cm土层总有机碳含量分别为10.38、6.73、11.16和4.37 g/kg;试验地0~50 cm土层土壤溶解性有机碳含量平均值的大小顺序为荒漠风沙土>榆树白腊混交林土>俄罗斯杨土>新疆杨土;3种林土与荒漠风沙土的活性有机碳之间有显著性差异,但林种土壤之间活性有机碳没有显著差异;林区土层微生物生物量碳含量均高于荒漠区,各土层俄罗斯杨土壤微生物生物量碳含量均小于新疆杨和混交林区。【结论】林区新建后的各层土壤有机质、活性有机碳以及微生物生物量碳含量增加,大小顺序为榆树白腊混交林土>新疆杨土>俄罗斯杨土>荒漠风沙土,溶解性有机碳降低。新建林区乔木和草本的生物量均大于荒漠风沙土的生物量。生物量大小顺序为总生物量大小及顺序为:俄罗斯杨>新疆杨>榆树白腊混交林>荒漠风沙土。
【Objective】 The objective of this study was to compare the contents of soil organic carbon and biomass with Xinjiang Populus euphratica, Populus euphratica, Ulmus fortunei mixed forest and the original desertified aeolian sandy soil in Karamay desert area so as to clarify the effects of afforestation on soil organic Carbon content of the impact of land use and ecological protection to provide basic data. 【Method】 Sampling and analysis of the original sandy desertification soil in the newly built forest area and the periphery were conducted to compare the total organic carbon, active organic carbon, dissolved organic carbon, microbial biomass carbon content and biomass . 【Result】 The results showed that the total organic carbon contents in the soil layers of 0 ~ 50 cm in the soil of Yang-Yang, Russia, Populus euphratica, Ulmus fortunei and desert soil were 10.38, 6.73, 11.16 and 4.37 g / kg, respectively. Soil organic matter content of soil dissolved organic carbon in the order of desert sand sandy soil> elm mixed forest soil> Russian Yang soil> Xinjiang Yang soil; 3 kinds of forest soil and desert aeolian sandy soil active organic carbon was significant However, there was no significant difference in soil active organic carbon between forest types. The soil microbial biomass carbon content in forest area was higher than that in desert area. Soil microbial biomass carbon content in Populus euphratica forest was less than that in Xinjiang poplar and mixed forest. 【Conclusion】 The contents of soil organic matter, active organic carbon and microbial biomass carbon in all layers increased after the newly built forests in forest area. The order of the order was Elm Ash mixed forest> Xinjiang Yangba> Russian Poplar> desert aeolian sandy soil, dissolved organic carbon reduce. The biomass of trees and herbs in the newly-built forest area was higher than that of desertified sandy soil. The order of biomass biomass was as follows: Russian poplar> Populus euphratica> Ulmus bungeana mixed forest> desert aeolian sandy soil.