摘要
土壤作为自然资源的重要要素,影响着生物的生长、种类和分布,是生态系统的枢纽。通过野外系统调查、采集仁怀市境内主要土壤,结合文献资料,分析评价其土壤主要理化性状,以期为仁怀市的生物多样性基础提供科学支撑。结果表明:区内土壤类型多样,地带性土壤为黄壤,紫色土是其特色土类。按照土壤分类的发生学原则,共分为4个土类,14个亚类,64个土属,165个土种。分析显示,区内表层土壤pH的平均值为7.22,有机质为11.49 g/kg,全氮为1.70 g/kg,碱解氮为118.59 mg/kg,速效磷为10.12 mg/kg,速效钾为259.98 mg/kg,缓效钾为109.13 mg/kg,根据土壤肥力综合等级划分标准,养分综合评价值为3.4,养分综合等级为三等,土壤肥力等级为中等。对紫色土的分析显示,区内紫色土的pH与全氮和缓效钾呈极显著正相关关系,与有机质、碱解氮、有效磷以及速效钾没有相关性。本文研究结果可为仁怀市土壤保育和农林业区划提供参考。
As an important element of natural resources,soil affects the growth,species and distribution of organisms,and is the hub of the ecosystem.Through systematic field investigation and collection of the main soil in Renhuai city,combined with literature data,the main physical and chemical properties of the soil were analyzed and evaluated,in order to provide scientific support for the basis of biodiversity in Renhuai city.The results showed that there were various soil types in this area,the zonal soil was yellow soil,and the purple soil was its characteristic soil.According to the genetic principle of soil classification,it could be divided into 4 soil classes,14 subclasses,64 soil genera and 165 soil species.Analysis showed that the average value of pH,organic matter,total nitrogen,alkali-hydrolyzed nitrogen,available phosphorus,available potassium,slow available potassium in surface soil were 7.22,11.49 g/kg,1.70 g/kg,118.59 mg/kg,10.12 mg/kg,259.98 mg/kg,109.13 mg/kg,respectively.According to the comprehensive classification standard of soil fertility,the comprehensive evaluation value of nutrients was 3.4,the comprehensive nutrient grade was third grade,and the soil fertility grade was medium.The analysis of purple soil showed that the pH of purple soil was positively correlated with total nitrogen and slow-available potassium,but not with organic matter,alkali-hydrolyzed nitrogen,available phosphorus and quick-available potassium.The results of this paper could provide reference for soil conservation and agroforestry regionalization in Renhuai city.
作者
罗荣鹏
刘佳君
王雨薇
李耀
Luo Rongpeng;Liu Jiajun;Wang Yuwei;Li Yao(Forestry Bureau of Renhuai,Renhuai 564500,Guizhou,China;College of Agriculture,Guizhou University,Guiyang 550025,Guizhou,China)
出处
《山地农业生物学报》
2023年第6期18-23,共6页
Journal of Mountain Agriculture and Biology
基金
仁怀市林业局项目(GZBL-CG22-A[2022-152])
贵州大学2023年实验室开放项目(SYSKF2023-074)。
关键词
土壤
理化性状
肥力评价
仁怀
soil
physical and chemical properties
fertility evaluation
Renhuai
