苍术根际区土壤养分变化规律

目的:分析苍术根际区土壤养分的变化规律。方法:对比分析不同产地,相同立地环境下栽培与野生,及不同生长年限栽培苍术根际区土壤全氮、碱解氮、有效磷、有效钾、有机质及pH的差异。结果:茅山(MS)、罗田(LT)及妙峰山(MFS)苍术根际区土壤全氮、碱解氮、有效磷、有效钾、有机质及pH含量均有显著差异(P<0.01),6项指标平均值都是MS样品最低,MFS样品最高,而LT样品居中;栽培苍术根际区土壤全氮、有机质、碱解氮显著低于野生苍术根际区土壤(P<0.01),有效磷,pH高于野生苍术根际区土壤(P<0.05),有效钾没有差异(P>0.05);2年生苍术根际区土壤有效磷含量显著高于1年生苍术根际区土壤(P<0.01),全氮、有机质、碱解氮、有效钾及pH差异不显著(P>0.05)。结论:茅山苍术在生长发育过程中受到较重养分缺乏胁迫,主要表现为缺钾胁迫。

The status and changes of soil nutrients in rhizosphere of cultivated Atractylodes lancea

Objective: To find the status and changes of the soil nutrients in rhizosphere of Atractylodes lancea.Method: Total nitrogen(total N),available K,available P,organic matter(ORG),available nitrogen and pH in rhizosphere soil of the wild growing A.lancea in 3 sites,MS,LT and MFS,and the cultivated ones with different ages in LT were detected.Result:The contents of total nitrogen(total N),available K,available P,organic matter(ORG),available nitrogen and pH value in rhizosphere soil were significant different between MS,LT and MFS(P<0.01). The results of the 6 detected parameters in MS were the lowest,in MFS were the highest and in LT were in the middle.The total N,ORG and available N in the cultivated A.lancea were lower than that in the wild ones(P<0.01) and available P and pH value in the cultivated A.lancea were higher than that in wild ones(P<0.01) and there was no difference in available K between the wild and cultivated ones in LT(P>0.05);3 available P in rhizosphere soil of the two years old A.lancea were higher than of the one year old A.lancea (P<0.01) and there were no difference of total N,ORG,available N, available K and pH value in rhizosphere soil of A.lancea between one year and two years plant(P>0.05).Conclusion: It is indicated that the growth of A.lancea in Mt.Mao is faced nutrient stress.