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Crop rotation impact on soil quality

机译：轮作对土壤质量的影响

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Management systems influence soil quality over time. A study was carried out on Vanmeter farm of the Ohio State University South Centers at Piketon Ohio, USA to evaluate the impact of crop rotations on soil quality from 2002 to 2007. The crop rotations comprised of continuous corn (CC), corn-soybean (CS) and corn–soybean-wheat-cowpea (CSW). Ten soil cores were collected at 0-7.5, 7.5-15, 15-22.5 and 22.5-30 cm, and sieved. The soils were analyzed for total microbial biomass (Cmic), basal respiration (BR) and specific maintenance respiration (qCO2) rates as biological quality indicators; total organic carbon (TC), active carbon (AC) and total nitrogen (TN) as chemical quality indicators; and aggregate stability (AS), particulate organic matter (POM) and total porosity (.t) as physical quality parameters at different depths of soil. The inductive additive approach based on the concept of "higher value of any soil property except .t, a better indicator of soil quality" was used to calculate the biological (SBQ), chemical (SCQ), physical (SPQ) and composite soil quality (SQI) indices. The results showed that crop rotation had significant impact on Cmi c, BR, qCO2, TC, AC, TN, AS and POM except .t at different depths of soil. The CSW had higher soil quality values than CC and CS. The values of selected soil quality properties under the given crop rotation significantly decreased except .t with increasing soil depth. The SBQ (23%), SCQ (16%), SPQ (7%) and SQI (15%) improved under CSW over time. The results imply that multiple cropping systems could be more effective for maintaining and enhancing soil quality than sole-cropping systems.
机译：管理系统会随着时间影响土壤质量。在美国俄亥俄州派克顿的俄亥俄州立大学南中心的Vanmeter农场进行了一项研究，以评估2002年至2007年轮作对土壤质量的影响。轮作包括连续玉米（CC），玉米-大豆（ CS）和玉米-大豆-小麦-w豆（CSW）。在0-7.5、7.5-15、15-22.5和22.5-30 cm处收集十个土壤核心，并过筛。分析土壤中的总微生物量（Cmic），基础呼吸（BR）和特定维持呼吸（qCO2）速率，作为生物质量指标;总有机碳（TC），活性炭（AC）和总氮（TN）作为化学质量指标;骨料稳定性（AS），颗粒有机物（POM）和总孔隙率（.t）作为土壤不同深度的物理质量参数。基于“除.t以外的任何土壤特性均具有较高的价值，更好的土壤质量指标”这一概念的归纳法可用于计算生物（SBQ），化学（SCQ），物理（SPQ）和复合土壤质量（SQI）索引。结果表明，在不同土壤深度下，轮作对Cmi c，BR，qCO2，TC，AC，TN，AS和POM均具有显着影响。 CSW的土壤质量值高于CC和CS。在给定的作物轮作条件下，选定的土壤质量特性值除.t随土壤深度增加外显着降低。随着时间的推移，SBQ（23％），SCQ（16％），SPQ（7％）和SQI（15％）随时间而改善。结果表明，与单一种植系统相比，多种种植系统在保持和提高土壤质量方面可能更为有效。

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