Agricultural practices influence biological soil quality indicators in an irrigated semiarid agro-ecosystem

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2023-03-01 DOI:10.1016/j.pedobi.2022.150862

Mohammed Omer , Omololu J. Idowu , Nicole Pietrasiak , Dawn VanLeeuwen , April L. Ulery , Andrew J. Dominguez , Rajan Ghimire , Mark Marsalis

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引用次数: 3

Abstract

A study was conducted to investigate how soil biological measurements can be used to indicate differences in soil quality in arid and semiarid agroecosystems. The objectives were to assess soil biological quality indicators under different land management practices and at different depths and to explore the relationships between soil microbial community and organic matter fractions. Soil samples were collected from three replicates of six land management systems at 0–5 cm and 5–15 cm soil depths. Four management systems had medium to fine soil texture including a permanent grass field with tall fescue (Lolium arundinaceum [Schreb]; TFC), peach orchard with clover understory (Prunus persica with Trifolium repens L.; PCC), alfalfa field (Medicago sativa; ALF) and conventionally tilled soil with an annual crop rotation (CTC). Two management systems, including a young cottonwood tree orchard (Populus fremontii and Populus deltoides; CWS) and conventionally tilled soil in annual crop rotation (CTS), had coarse soil texture. Management systems had significant impacts on most of the soil biological indicators assessed at the two depths with both depths responding similarly to management practices. For the soil biological indicators that showed differences, the TFC generally had the most favorable indicator measurements compared to other management systems. The principal component analysis showed a clear separation between the management systems and microbial communities at both soil depths. The ordination pattern was structured by soil textural differences between medium to fine-textured soils from TFC, PCC, ALF, and CTC fields and coarse-textured soils (CWS, CTS). Spearman’s correlation coefficients (r_s) showed that the soil organic matter (r_s = 0.85, P = 0.001) and the permanganate oxidizable carbon (r_s = 0.93, P = 0.001) were significantly correlated with the total microbial biomass at 0–5 cm soil depth. Also, the soil organic matter (r_s = 0.84, P = 0.001) was significantly correlated with the total microbial biomass at 5–15 cm soil depth. This study suggests that in semiarid agroecosystems, management practices with permanent covers have the potential to improve soil quality, and soil texture may also influence the directional changes in soil quality within this region.

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农业实践对半干旱灌溉农业生态系统土壤生物质量指标的影响

研究了如何利用土壤生物学测量来指示干旱和半干旱农业生态系统中土壤质量的差异。目的是评价不同土地管理方式和不同深度下的土壤生物质量指标，探讨土壤微生物群落与有机质组分之间的关系。在0 ~ 5 cm和5 ~ 15 cm土壤深度，对6种土地管理制度进行3次重复采样。四种管理制度具有中等到优良的土壤质地，包括一个长有高羊茅的永久草地[Schreb];桃园与三叶草林下(桃园与三叶草;紫花苜蓿(Medicago sativa;ALF)和每年轮作(CTC)的传统耕作土壤。两个管理体系，包括一个杨树园(白杨和三角杨树园);轮作土壤与常规耕作土壤的土壤质地较粗。管理制度对两个深度评估的大多数土壤生物指标有显著影响，两个深度对管理做法的反应相似。对于表现出差异的土壤生物指标，与其他管理系统相比，TFC通常具有最有利的指标测量值。主成分分析表明，两种土壤深度的管理制度和微生物群落之间存在明显的分离。TFC、PCC、ALF和CTC的中、细质地土壤与粗质地土壤(CWS、CTS)的土壤质地差异构成了排序格局。Spearman相关系数(rs)表明，土壤有机质(rs = 0.85, P = 0.001)和高锰酸盐可氧化碳(rs = 0.93, P = 0.001)与0 ~ 5 cm土层微生物总生物量呈极显著相关。土壤有机质(rs = 0.84, P = 0.001)与5 ~ 15 cm土壤总微生物量呈极显著相关。本研究表明，在半干旱农业生态系统中，永久覆盖的管理措施具有改善土壤质量的潜力，土壤质地也可能影响该区域土壤质量的方向性变化。

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.