梭梭幼苗根区土壤因子变化及其生物量分配响应OA
Changes in soil factors and biomass allocation response in the root zone of young seedlings of Haloxylon ammodendron
为探究古尔班通古特沙漠梭梭幼苗根区土壤水分和养分因子的空间分布格局,揭示土壤因子变化对幼苗生物量分配的影响关系.以梭梭幼苗及其根区土壤为研究对象,采用野外监测与室内分析相结合的方法,分析幼苗关键生长期土壤水分和养分含量与植株根冠比变化状况.结果表明:(1)根区(水平30 cm以内,垂直40 cm以内)空间范围土壤含水率整体显著高于其他空间范围,8月水平30 cm处0~20 cm土层土壤含水率较10 cm处低50.54%,较50 cm处高34.82%.(2)不同水平距离处土壤有机质、碱解氮、有效磷和速效钾含量,随着土壤深度的增加逐渐降低.8月水平50 cm处0~20 cm土层有机质含量较10 cm处高出35.41%.(3)幼苗地上生物量、地下生物量和总生物量随着生长期的推移呈递增趋势,而根冠比呈递减趋势,8月幼苗根冠比较4月低22.14%.(4)幼苗根区土壤含水率、有机质和速效养分含量与根冠比间均呈负相关,其中土壤含水率和有机质含量对根冠比的影响程度高于其他指标.研究结果可为荒漠区生态恢复和植被抚育管理提供理论依据和技术参数.
To explore the spatial distribution pattern of soil water and nutrient factors in the rhizosphere of Halox-ylon ammodendron seedlings in the Gurbantünggüt Desert and reveal the influence of changes in soil factors on the biomass allocation of seedlings,a study was conducted with Haloxylon ammodendron seedlings and the soil in their rhizosphere and canopy zone as the research objects.By adopting a combination of field monitoring and laboratory analysis,we analyzed the variations in soil water and nutrient contents as well as the seedling root-shoot ratio during the key growing periods of the seedlings.The results revealed the following.(1)The soil moisture content in the near rhizosphere(within 30 cm in the horizontal direction and 40 cm in the vertical direc-tion)was significantly higher overall than that in other spatial ranges.In August,the soil moisture content in the 0-20 cm layer at 30 cm in the horizontal direction was 50.54%lower than that at 10 cm and 34.82%higher than that at 50 cm.(2)The contents of soil organic matter,alkali-hydrolyzable nitrogen,available phosphorus,and available potassium at different horizontal distances gradually decreased with an increase in soil depth.In August,the organic matter content in the 0-20 cm layer at 50 cm in the horizontal direction was 35.41%higher than that at 10 cm.(3)The aboveground,belowground,and total biomass of seedlings demonstrated an increasing trend with the progression of the growing period,whereas the root-shoot ratio showed a decreasing trend.The root-shoot ratio of seedlings in August was 22.14%lower than that in April.(4)Soil moisture,organic matter,and available nutrient contents in the rhizosphere and canopy zone of seedlings were negatively correlated with the root-shoot ratio,among which soil moisture content and organic matter content had a higher degree of influence on the root-shoot ratio than other indicators.The results provide a theoretical basis and technical parameters for ecological restoration and vegetation tending management in desert regions.
吴明哲;李宇娟;师雅鑫;谷海斌;陈芮;王泽;杨艳艳;程军回;吕英豪;韦琴琴
新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤与植物生态过程重点实验室,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤与植物生态过程重点实验室,新疆 乌鲁木齐 830052新疆维吾尔自治区农业科学院植物保护研究所,新疆 乌鲁木齐 830091新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤大数据工程技术研究中心,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤大数据工程技术研究中心,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤大数据工程技术研究中心,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤大数据工程技术研究中心,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤大数据工程技术研究中心,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤与植物生态过程重点实验室,新疆 乌鲁木齐 830052新疆农业大学资源与环境学院,新疆 乌鲁木齐 830052||新疆土壤与植物生态过程重点实验室,新疆 乌鲁木齐 830052
梭梭幼苗根区土壤因子分布格局根冠比
Haloxylon ammodendron seedlingsrhizosphere zonesoil factorsdistribution patternroot-shoot ratio
《干旱区研究》 2026 (10)
2145-2156,12
国家自然科学基金(32260424,32501569)新疆种植业绿色生产技术工程中心启动基金项目(23XJZZYLS06)
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