Investigation on Soil Physical and Chemical Properties,Microorganisms and Enzyme Activities of Walnut Plantation in Changshun County
The purpose of this study was to investigate the soil conditions of walnut planting fields at different depths,so the walnut planting fields in Changshun County were divided into(1 m×1 m)plots,and soil samples of 0 cm-20 cm(S1),20 cm-40 cm(S2)and 40 cm-60 cm(S3)were taken,respectively.Soil physical and chemical properties,microorganisms and enzyme activities in dif-ferent soil layers were measured.The results showed that among the soil physicochemical property indexes,there was no difference in pH value of S1,S2 and S3 groups(P>0.05),water content S3<S2<S1(P<0.05),organic matter,total nitrogen and total phosphor-us contents of S1 were higher than those of S2 and S3(P<0.05),and S2 was higher than S3(P<0.05).The contents of bacteria,fungi and actinomyces in S1 were significantly higher than those in S2 and S3(P<0.05),but there was no difference between S2 and S3(P>0.05).The results of soil enzyme activity showed that the urease activity,sucrase activity and hydrogen peroxide activity of S2 were higher than those of S1 and S3 groups,among which S1 group was the lowest,followed by S3 group,and there was a difference a-mong groups(P<0.05).The above results indicate that there are great differences in soil nutrient content in different depth layers in walnut planting areas.
Walnutssoil microorganismssoil enzyme activitysoil physical and chemical properties
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