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Correlations among soil biochemical parameters, crop yield, and soil respiration vary with growth stage and soil depth under fertilization
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-04-23 , DOI: 10.1002/agj2.20699
Guopeng Liang 1, 2 , Xueping Wu 1 , Andong Cai 1, 3 , Hongcui Dai 4 , Liping Zhou 5 , Dianxiong Cai 1 , Albert Houssou 1, 6 , Lili Gao 3 , Bisheng Wang 1 , Shengping Li 1 , Xiaojun Song 1 , Huijun Wu 1
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Most studies only measure soil biochemical parameters in the surface soil at one growth stage to uncover how fertilization affects crop yield and soil respiration. A field study was conducted in a wheat (Triticum aestivum L.)–maize (Zea mays L.) rotation system to determine whether correlations among soil biochemical parameters, crop yield, and soil respiration vary with growth stage and soil depth. Annual crop yield, seasonal soil respiration, soil biochemical parameters at different growth stages (i.e., soil enzyme activity and available N content), and soil chemical parameters at different soil depths (i.e., soil organic carbon [SOC] and total nitrogen [TN] content) were measured. Stronger positive relationships between crop yield, soil respiration, and soil biochemical parameters were found at the first growth stage relative to other stages during both the 2013 wheat and 2014 maize growing seasons. In addition, the most significant relationship among soil chemical properties, crop yield, and soil respiration was found at 20-to-40-cm soil depth during the 2013 wheat growing season but was found at 0-to-20-cm soil depth during the 2014 maize growing season. Overall, correlations among soil biochemical parameters, crop yield, and soil respiration vary with growth stage and soil depth under fertilization. Our study indicates that single time-point measurements of only surface soil biochemical parameters are not sufficient to understand fertilization impacts on crop yield and soil respiration.

中文翻译:

施肥条件下土壤生化参数、作物产量和土壤呼吸之间的相关性随生长阶段和土壤深度而变化

大多数研究仅测量某一生长阶段表层土壤中的土壤生化参数,以揭示施肥如何影响作物产量和土壤呼吸。在小麦 ( Triticum aestivum L. )-玉米 ( Zea maysL.) 轮作系统,以确定土壤生化参数、作物产量和土壤呼吸之间的相关性是否随生长阶段和土壤深度而变化。一年生作物产量、季节性土壤呼吸、不同生长阶段的土壤生化参数(即土壤酶活性和有效氮含量),以及不同土壤深度的土壤化学参数(即土壤有机碳 [SOC] 和总氮 [TN])含量)进行测量。在 2013 年小麦和 2014 年玉米生长季节,相对于其他阶段,在第一个生长阶段发现了作物产量、土壤呼吸和土壤生化参数之间更强的正相关关系。此外,土壤化学性质、作物产量、2013 年小麦生长季节在 20 至 40 厘米土壤深度处发现了土壤呼吸,但在 2014 年玉米生长季节期间在 0 至 20 厘米土壤深度处发现了土壤呼吸。总体而言,土壤生化参数、作物产量和土壤呼吸之间的相关性随施肥生长阶段和土壤深度而变化。我们的研究表明,仅对表层土壤生化参数进行单一时间点测量不足以了解施肥对作物产量和土壤呼吸的影响。
更新日期:2021-04-23
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