ZHANG Bo,LI Gangtie,ZHANG Hongwu,et al.Spatial Distribution Characteristics of Soil Nutrients in Artificially Planted Pennisetum giganteum[J].Northern Horticulture,2022,(05):91-96.[doi:10.11937/bfyy.20214016]
人工种植巨菌草土壤养分空间分布特征
- Title:
- Spatial Distribution Characteristics of Soil Nutrients in Artificially Planted Pennisetum giganteum
- Keywords:
- Pennisetum giganteum; time; soil nutrients; spatial distribution
- 文献标志码:
- A
- 摘要:
- 以巨菌草为试材，采用方差分析法，将样地人工种植巨菌草按照种植时长分为1年（FY）和2年（SY），设置根际、株缘和株间为水平方向，0~100 cm为垂直方向，并设置裸沙地作为对照（CK），研究了人工种植巨菌草后土壤养分分布特征，以期为该地区土壤改良研究提供参考依据。结果表明：土壤有机碳，速效氮、速效磷含量随着种植时间的增加呈正相关关系,速效钾含量呈先上升后下降趋势，其中表层土壤的增加效应最大，随着土壤深度增加，增加效应逐渐减弱。最底层土壤效果最小，其中速效磷对巨菌草种植时间的影响最明显且SY土壤养分的增加效果最为明显。垂直方向对速效氮、速效磷和速效钾的效果集中于表层以下，有机碳多集中于10 cm土层以下，且随着土层深度的加深，该效应逐渐减弱；对于水平方向，根际对于相同深度的增幅效果最高，随着土层深度的加深，该作用逐渐减弱。
- Abstract:
- Taking Pennisetum giganteum as the test material,the method of variance analysis was used to set the artificial planting of Pennisetum giganteum as one year (FY) and two years (SY) according to the planting time.The rhizosphere,plant margin,interplant were set as the horizontal direction and 0-100 cm was set as the vertical direction.And the bare sandy land was set as the control (CK) to study the soil nutrient distribution characteristics after artificial planting of Pennisetum giganteum,in order to provide reference for the study of soil improvement in this area.The results showed that the contents of soil organic carbon,available nitrogen and available phosphorus showed a positive correlation with the increase of planting time,and the content of available potassium first increased and then decreased.Among them,the increasing effect of the surface soil was the largest,and the increasing effect gradually weakened with the increase of soil depth.The bottom soil had the least effect,among which the effect of available phosphorus on the planting time of Pennisetum giganteum was the most obvious and the increase of SY soil nutrients was the most significant.The effect of the vertical direction on available nitrogen,available phosphorus and available potassium was concentrated below the surface layer,while the organic carbon was mostly concentrated below the 10 cm soil layer,and the effect was gradually weakened with the deepening of the soil layer depth.For the horizontal direction,the rhizosphere had the highest effect on the increase of the same depth,and this effect gradually weakened with the deepening of soil depth.
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备注/Memo
第一作者简介：张博（1996-），男，硕士研究生，研究方向为水土保持与荒漠化防治。E-mail:1035329326@qq.com.责任作者：李钢铁（1963-），男，博士，教授，现主要从事水土保持与荒漠化防治等研究工作。E-mail:13848817183@163.com.基金项目：国家发改委科技部专项资助项目（RZ1900003668）。收稿日期：2021-09-28