Soil organic carbon and nitrogen pools are increased by mixed grass and legume cover crops in vineyard agroecosystems: Detecting short-term management effects using infrared spectroscopy
Soil organic carbon and nitrogen pools are increased by mixed grass and legume cover crops in vineyard agroecosystems: Detecting short-term management effects using infrared spectroscopy
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DOI：
10.1016/j.geoderma.2020.114619
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发表时间：
2020-12-01
期刊：
影响因子：
6.1
通讯作者：
Pendall, E.
中科院分区：
文献类型：
--
作者：
Ball, K. R.;Baldock, J. A.;Pendall, E.
在果园和葡萄园中种植覆盖作物可以增加土壤有机碳（OC），提高氮（N）的有效性。本研究比较了三个草本下藤覆盖作物组合影响有机碳和氮库在四个不同的土壤葡萄园农业生态系统。利用物理分级和土壤光谱分析，我们：1）比较了草和豆科植物的单一和多文化的影响，总，粗（>= 50 μ m）和罚款（< 50 μ m）池的OC和总氮（TN），以及可提取的N（ExN），和2）评估预测的OC和TN池的红外光谱（IRS）和偏最小二乘回归分析（PLSR）。与对照处理相比，总的，粗的和细的部分OC的存在下，豆科植物和豆科植物的更大; ExN增加38%，豆科植物和豆科植物的混合物中的78%。通过初始校准，我们使用一个土壤光谱分析成功地推导出预测整个土壤中OC含量的模型，以及OC在粗颗粒和细颗粒中的分配。除了证明将草和豆科作物覆盖到葡萄园种植系统，以提高OC和不同土壤类型的氮的储存和可用性的功效，这项研究证实了IRS/PLSR预测OC浓度变化的能力差异地面覆盖管理。IRS/PLSR是一种快速量化短期管理对土壤有机质库影响的重要和实用的方法，有助于提高对葡萄园农业生态系统土壤C和N动态的认识。
The incorporation of cover crops in orchards and vineyards can increase soil organic carbon (OC) and improve nitrogen (N) availability. This study compared how three herbaceous under-vine cover crop assemblages affected OC and N pools in four edaphically distinct vineyard agroecosystems. Using physical fractionation and soil spectral analysis we: 1) compared effects of grass and legume mono- and poly-cultures on total, coarse (>= 50 mu m) and fine (< 50 mu m) pools of OC and total N (TN), as well as extractable N (ExN), and 2) assessed predictions of OC and TN pools by infrared spectroscopy (IRS) and partial least squares regression analyses (PLSR). Compared with the control treatment, total, coarse and fine fraction OC were greater in the presence of grasses and legumes; ExN was increased 38% by legumes, and 78% in legume-grass mixture. With initial calibration, we used one soil spectral analysis to successfully derive models predicting contents of OC in the whole soil, and the allocation of OC to coarse and fine fractions. In addition to demonstrating the efficacy of incorporating grass and legume cover crops into vineyard cropping systems to improve OC and the storage and availability of N across diverse soil types, this study confirms the ability of IRS/PLSR to predict changes in OC concentrations related to differential ground cover management. IRS/PLSR is an important and practical approach for the rapid quantification of short-term management impacts on SOM pools, contributing significantly towards improved under- standing of soil C and N dynamics in vineyard agroecosystems.