Soil protein: A key indicator of soil health and nitrogen management
Soil protein: A key indicator of soil health and nitrogen management
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DOI：
10.1002/saj2.20600
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发表时间：
2023-10
影响因子：
2.9
通讯作者：
Katherine Naasko;T. Martin;Christian Mammana;Jacob Murray;Meredith Mann;Christine D. Sprunger
中科院分区：
文献类型：
--
作者：
Katherine Naasko;T. Martin;Christian Mammana;Jacob Murray;Meredith Mann;Christine D. Sprunger
监测农业生态系统中的土壤氮（N）动态是土壤健康管理的基础，对于在对比管理系统中最大限度地提高作物生产力至关重要。新建立的土壤健康指标，高压灭菌柠檬酸盐可提取（ACE）蛋白质，测量有机结合的N池。然而，ACE蛋白和其他氮相关的土壤健康指标之间的关系知之甚少。在这项研究中，ACE蛋白与其他土壤氮措施在一个单一的生长季节沿着一个33年的复制8系统管理强度梯度位于西南，密歇根州，美国的四个时间点进行了调查。平均而言，促进土壤健康的多作物多年生系统的ACE蛋白浓度比一年生作物和单一作物多年生系统高2至4倍（高2至12 g kg−1）。此外，ACE蛋白在整个生长季节的波动小于土壤总氮，NH 4 +-N和NO3--N，这表明ACE蛋白有潜力作为土壤健康和土壤有机氮状况的可靠指标。此外，在整个管理强度梯度的各个采样时间点，ACE蛋白与土壤全氮和NH 4 +-N呈正相关，与NO3--N呈负相关。此外，ACE蛋白，测量接近生长季节结束时，显示出一致的和积极的趋势与产量在不同的系统。这项研究强调了ACE蛋白作为可持续管理实践，SOM循环和土壤健康指标的潜力，并呼吁更多的研究调查其与作物生产力的关系。版权所有
Monitoring soil nitrogen (N) dynamics in agroecosystems is foundational to soil health management and is critical for maximizing crop productivity in contrasting management systems. The newly established soil health indicator, autoclaved‐citrate extractable (ACE) protein, measures an organically bound pool of N. However, the relationship between ACE protein and other N‐related soil health indicators is poorly understood. In this study, ACE protein is investigated in relation to other soil N measures at four timepoints across a single growing season along a 33‐year‐old replicated eight system management intensity gradient located in southwest, Michigan, USA. On average, polyculture perennial systems that promote soil health had two to four times higher (2 to 12 g kg−1 higher) ACE protein concentrations compared to annual cropping and monoculture perennial systems. In addition, ACE protein fluctuated less than total soil N, NH4+‐N, and NO3−‐N across the growing season, which shows the potential for ACE protein to serve as a reliable indicator of soil health and soil organic N status. Furthermore, ACE protein was positively correlated with total soil N and NH4+‐N and negatively correlated with NO3−‐N at individual sampling timepoints across the management intensity gradient. Also, ACE protein, measured towards the end of the growing season, showed a consistent and positive trend with yield across different systems. This study highlights the potential for ACE protein as an indicator of sustainable management practices, SOM cycling, and soil health, and calls for more studies investigating its relationship with crop productivity.This article is protected by copyright. All rights reserved