ZHANG Li,WANG Yuxin,ZHANG Yanling,et al.Effects of Different Slope Positions on Soil Properties and Vegetation Growth Status of the Atractylodes lancea[J].Northern Horticulture,2019,43(21):102-108.[doi:10.11937/bfyy.20191121]
不同坡位对土壤特性及茅苍术幼苗长势的影响
- Title:
- Effects of Different Slope Positions on Soil Properties and Vegetation Growth Status of the Atractylodes lancea
- Keywords:
- Atractylodes lancea; slope position; soil physical properties; soil nutrients; principal component analysis
- 文献标志码:
- A
- 摘要:
- 以2年生茅苍术为试材，研究了坡上位、坡中位和坡下位0~40 cm土层土壤理化性质和茅苍术生长状况，以探明茅苍术种植区不同坡位土壤供肥能力与植株长势的关系，制定科学的管理措施。结果表明：相同土层，坡中位和坡下位土壤容重低于坡上位，而土壤含水量、pH和速效养分含量高于坡上位。与坡下位相比，坡中位土壤含水量较低、土壤养分含量较高，且在0~10 cm土层差异达到显著水平，坡中位0~10 cm土层土壤含水量比坡下位降低33.3%，土壤有机质、碱解氮、有效磷和速效钾含量分别提高27.5%、13.7%、335.6% 和37.8%，进而为茅苍术生长提供充足的营养物质，显著提高其地上生物量和根茎干质量。进一步分析发现，茅苍术地上生物量和根茎干质量与土壤含水量呈显著负相关，与土壤有机质、有效磷、速效钾含量呈显著正相关，其中坡下位土壤含水量较高、坡上位土壤速效养分含量较低是影响茅苍术生长的主要因素。综上所述，坡中位土壤供肥水平较高，更利于茅苍术生长。
- Abstract:
- In order to investigate the relationship between soil nutrient contents and vegetation growth status in different slope positions,the field experiment was conducted in hilly area of Dabie Mountain with biennials Atractylodes lancea.The soil bulk density (BD),soil water content (SWC),soil pH,soil organic matter (SOM),soil alkaline hydrolysis nitrogen (AN),soil available phosphorus (AP) and soil available potassium (AK) within 40 cm layers under upper slope,middle slope and lower slope have been studied.The results showed that with the increase of the slope level,the BD in the same layer increased,but the SWC,pH and contents of soil available nutrients decreased.The middle slope had lower SWC and higher soil nutrients contents than lower slope,and the difference were significant in 0-10 cm layers.Compared with lower slope,the SWC with 10 cm layers of middle slope decreased by 33.3%,and the contents of SOM,AN and AK increased by 27.5%,13.7%,335.6% and 37.8%,respectively,so the middle slope could provide more nutrients for plant development and finally had the highest aboveground biomass and rhizome dry weight among three positions.Further analysis found that the aboveground biomass and rhizome dry weight had significantly negative correlation with SWC,and had a significantly positive correlation with SOM,AP and AK.The lower contents of soil available nutrients in upper slope and the higher soil water content in lower slope were the main reason for limiting plant growth.Thus,the middle slope is better position to plant Atractylodes lancea due to the higher soil nutrient content.
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备注/Memo
第一作者简介：张莉(1987-)，女，河南信阳人，博士，讲师，现主要从事土壤耕作与培肥等研究工作。E-mail:dazhang0376@163.com.责任作者：尹健(1964-)，男，河南信阳人，硕士，教授，现主要从事中药资源等研究工作。E-mail:yinjian3661@163.com.基金项目：河南省科技攻关资助项目(132102310265);信阳农林学院博士科研启动资金资助项目。收稿日期：2019-05-04