ABSTRACT

The objective of this study was to determine the effects of sampling time and depth on some soil properties in a natural olive grove. Soil samples were collected at 0–10 cm (S0) and 10–20 cm (S1) depths in February, May, August, and November between 2013 and 2015 in Cukurova University Campus, Adana, Turkey. The soil properties determined were soil organic carbon (SOC), total nitrogen (TN), C/N, soil C mineralization and rate (Cmin) under laboratory conditions, aerobic bacteria and fungi counts. Effect of soil depth on these properties was more significant than sampling time. SOC, TN, soil aerobic bacteria and fungi counts, and Cmin were generally decreased as soil depth increased. Carbon mineralizations in S0 and S1 were lowest in May 2014 and highest in May 2015. In general, there were no significant differences between depths and sampling times in soil bacteria counts and C/N while fungi counts in S0 were significantly higher in S1 in every sampling time (P < .05). SOC was significantly correlated with all soil properties in S1 and positively correlated with TN in both depths (P < .05). In conclusion, heterogeneity of soil properties was more comprehensible in depth than in sampling times.

摘要

本研究的目的是确定采样时间和深度对天然橄榄林中某些土壤特性的影响。2013 年至 2015 年 2 月、5 月、8 月和 11 月，在土耳其阿达纳的 Cukurova 大学校园收集了 0-10 厘米（S0）和 10-20 厘米（S1）深度的土壤样品。测定的土壤特性是实验室条件下土壤有机碳 (SOC)、总氮 (TN)、C/N、土壤 C 矿化和速率 (Cmin)、需氧细菌和真菌计数。土壤深度对这些特性的影响比采样时间更显着。随着土壤深度的增加，SOC、TN、土壤好氧细菌和真菌数量以及Cmin普遍降低。S0 和 S1 的碳矿化在 2014 年 5 月最低，在 2015 年 5 月最高。P < .05）。SOC 与 S1 的所有土壤性质显着相关，并与两个深度的 TN 呈正相关（P < .05）。总之，土壤性质的异质性在深度上比采样时间更容易理解。