乌兰布和沙漠东部巨菌草生长及土壤养分研究  

Study on the Growth and Soil Nutrients of Pennisetum giganteum in the Eastern of Ulan Buh Desert

在线阅读下载全文

作  者:王丹阳 孔垂玖 牧仁 安景源 刘雅婧 尚敏[1] WANG Danyang;KONG Chuijiu;MU Ren;AN Jingyuan;LIU Yajing;SHANG Min(Experimental Center of Desert Forestry,Chinese Academy of Forestry Inner Mongolia Dengkou Desert Ecosystem National Observation Research Station,Bayannur 015200,Inner Mongolia)

机构地区:[1]中国林业科学研究院沙漠林业实验中心内蒙古磴口荒漠生态系统国家定位观测研究站,内蒙古巴彦淖尔015200

出  处:《温带林业研究》2024年第4期23-28,共6页Journal of Temperate Forestry Research

基  金:内蒙古自治区自然科学基金项目(2024MS03067);国家自然科学基金青年项目(32101595)。

摘  要:【目的】了解巨菌草在乌兰布和沙漠东部的适应性及对土壤状况的影响,为解决该区域流沙入侵黄河问题提供理论依据。【方法】本研究选择抗逆性强、生长速度快的巨菌草作为研究对象,通过研究沙丘不同坡位(坡底、坡中和坡顶)巨菌草生长情况,探讨巨菌草与土壤养分的协同作用。【结果】(1)坡底巨菌草株高、叶生物量、茎生物量和地上生物量较坡顶分别增加22.88%、264.75%、55.73%和99.79%(P<0.05),坡顶巨菌草基径、地下生物量和根冠比较坡底分别增加6.25%、36.16%和132.14%(P<0.05)。(2)从巨菌草地下生物量垂直分布来看,坡顶0~10 cm土层根系生物量较20~30 cm增加96.15%(P<0.05),水平分布下,坡底和坡中15 cm处根系生物量是45 cm处的3.54和1.88倍(P<0.05)。(3)巨菌草表层土壤养分表聚现象明显,坡底0~10 cm土壤速效氮达到最小值,较10~20 cm减少12.15%(P<0.05)。0~10 cm和10~20 cm土层土壤有机质含量均在裸沙地最低,分别在坡底和坡中达到最大值,较其增加16.42%和13.22%(P<0.05)。20~40 cm土层土壤速效氮含量较裸沙地增加30.34%(P<0.05)。(4)主成分分析表明,基径、土壤速效磷和速效氮是影响巨菌草生长和土壤养分主要指标,且与巨菌草不同部分生物量和土壤全量养分呈极显著或显著关系(P<0.01或P<0.05)。【结论】乌兰布和沙漠东部裸沙地种植巨菌草可以有效固定流沙,改善土壤环境质量。【Objective】This paper aimed to understand the adaptability of Pennisetum giganteum in the eastern Ulan Buhe desert and its influence on soil condition,and to provide theoretical basis for solving the problem of shifting sand invading the Yellow River in this area.【Method】In this study,Pennisetum giganteum with strong stress resistance and fast growth rate was selected as the research object.By studying the growth of Pennisetum giganteum at different slope sites of dune(bottom,middle and top of slope),the synergic effect between Pennisetum giganteum and soil nutrients was discussed.【Results】(1)The plant height,leaf biomass,stem biomass,and aboveground biomass at the bottom of the slope increased by 22.88%,264.75%,55.73%,and 99.79%(P<0.05),respectively,compared with those at the top of the slope.The basal diameter,underground biomass,and root-shoot ratio at the top of the slope increased by 6.25%,36.16%,and 132.14%(P<0.05),respectively,compared with those at the bottom of the slope.(2)Under the vertical distribution of underground biomass,the root biomass of the 0-10 cm soil layer at the top of the slope increased by 96.15%compared with that of 20-30 cm soil layer(P<0.05).In the horizontal distribution,the root biomass at the bottom and middle of the slope at 15 cm was 3.54 and 1.88 times higher than that at 45 cm(P<0.05).(3)The surface soil nutrient aggregation phenomenon of Pennisetum giganteum is obvious,and the available nitrogen in the soil at the bottom of the slope from 0-10 cm reaches the minimum value,which is 12.15%lower than that at 10-20 cm(P<0.05).The soil organic matter content in the 0-10 cm and 10-20 cm soil layers is the lowest in bare sandy land,reaching its maximum values at the bottom and middle of the slope,respectively,with an increase of 16.42%and 13.22%(P<0.05)compared with the original values.The available nitrogen content in the soil layer of 20-40 cm reaches which is 30.34%higher than that in bare sandy land(P<0.05).(4)Principal component analysis showed that basal diameter,so

关 键 词:乌兰布和沙漠 巨菌草 植物生长 土壤养分 

分 类 号:S714[农业科学—林学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象