Valuing Supporting Soil Ecosystem Services in Agriculture: A Natural Capital Approach
Valuing Supporting Soil Ecosystem Services in Agriculture: A Natural Capital Approach
复制标题
重视农业土壤生态系统支持服务：自然资本方法
DOI：
10.2134/agronj14.0597
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发表时间：
2015
期刊：
影响因子：
2.1
通讯作者：
I. Thomsen
中科院分区：
文献类型：
--
作者：
M. Brady;K. Hedlund;Rong;L. Hemerik;S. Hotes;S. Machado;L. Mattsson;E. Schulz;I. Thomsen
土壤生物多样性通过提供生态系统功能和随之而来的支持性生态系统服务，为土壤生物体为农民带来好处，支撑农业生产。然而，缺乏实用方法来评估当前农业实践的长期影响，不可避免地会导致短视的管理决策。我们提出了一种基于未来农场收入流的变化来评估农业中支持土壤生态系统服务和相关土壤自然资本（土壤生物储量的价值）的变化的方法。我们假设土壤有机碳（SOC）浓度的相对变化与土壤生物多样性的变化和支持性生态系统服务的产生相关。为了量化支持服务变化对农业生产力的影响，我们将生产函数与欧洲和美国长期田间实验的数据进行了拟合。每个地点不同的农业处理导致 SOC 浓度随时间发生显着变化。相关服务的下降会降低未来的最大产量和肥料利用效率。当 SOC 浓度相对降低 1% 时，将未来值按 3% 贴现至当前值，土壤自然资本的平均折旧为 144 (sic) ha(-1) (SD 47 (sic) ha(-1))；这种变化可以通过场地特定因素和当前 SOC 浓度来解释。此外，结果表明，土壤生态系统服务不能完全用购买投入来替代；他们是不完美的替代品。我们预计我们的结果将鼓励并使得将土壤自然资本的价值纳入决策中成为可能。 （较少的）
Soil biodiversity through its delivery of ecosystem functions and attendant supporting ecosystem services-benefits soil organisms generate for farmers-underpins agricultural production. Yet lack of practical methods to value the long-term effects of current farming practices results, inevitably, in short-sighted management decisions. We present a method for valuing changes in supporting soil ecosystem services and associated soil natural capital-the value of the stock of soil organisms-in agriculture, based on resultant changes in future farm income streams. We assume that a relative change in soil organic C (SOC) concentration is correlated with changes in soil biodiversity and the generation of supporting ecosystem services. To quantify the effects of changes in supporting services on agricultural productivity, we fitted production functions to data from long-term field experiments in Europe and the United States. The different agricultural treatments at each site resulted in significant changes in SOC concentrations with time. Declines in associated services are shown to reduce both maximum yield and fertilizer-use efficiency in the future. The average depreciation of soil natural capital, for a 1% relative reduction in SOC concentration, was 144 (sic) ha(-1) (SD 47 (sic) ha(-1)) when discounting future values to their current value at 3%; the variation was explained by site-specific factors and the current SOC concentration. Moreover, the results show that soil ecosystem services cannot be fully replaced by purchased inputs; they are imperfect substitutes. We anticipate that our results will both encourage and make it possible to include the value of soil natural capital in decisions. (Less)