摘要
对云南特有极危种馨香木兰分布集中地西畴县生境的土壤理化性状进行了测定和分析,结果表明：馨香木兰现有分布区海拔1 300~1 700 m,坡向以北偏西为主,北偏东次之,南坡未出现。pH值平均为5.9,为弱酸性红壤;土壤有机质30.905~91.631 g/kg和水解氮141.216~328.041 g/kg,为二级以上土壤划分标准;土壤速效磷1.148~3.698 mg/kg,为五级以下土壤划分标准;全磷0.705~2.096 mg/kg,为三级以上土壤划分标准;土壤速效钾21.559~47.229 mg/kg,全钾1.351~3.250 mg/kg,为五级以下土壤划分标准。由此表明,馨香木兰林地土壤有机质和氮养分含量水平较高,而土壤速效磷、钾含量缺乏。为进一步研究馨香木兰最适生境理论提供依据。
Magnolia odoratissima is a critically endangered species and its distribution is limited in Xichou County of Yunnan.We analyzed the physical and chemical characteristics of the soil in the tree＇s habitat,it showed that the habitat was in altitude of 1 300～1 700 m,the slope was mainly northwest,less so on northeast and not found in south.Its average pH was 5.9,a faintly acid soil;organic materials ranging from 30.905～91.631 g/kg and hydrolysable nitrogen 141.216～328.041 g/kg,these were ranked the soil as second level standard.However rapidly available phosphorus was 1.148～3.698 mg/kg,which was under 5th level standard.The total phosphorus was 0.705～2.096 mg/kg,which was above 3rd level standard.rapidly available potassium was 21.559～47.229 mg/kg,and total potassium was 1.351～3.250 mg/kg,these were under 5th level standard.It was concluded that the soil had relatively higher level of organic materials and nitrogen,while scarce in rapidly available phosphorus and potassium.
出处
《西部林业科学》
CAS
2010年第4期95-98,共4页
Journal of West China Forestry Science
基金
云南省科技厅应用基础研究面上项目(2007C122M)
关键词
馨香木兰
群落生境
土壤理化性状
Magnolia odoratissima
community habitat
soil characteristics
