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首页> 外文期刊>Bioenergy research >Economic Evaluation of Switchgrass Feedstock Production Systems Tested in Potassium-Deficient Soils
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Economic Evaluation of Switchgrass Feedstock Production Systems Tested in Potassium-Deficient Soils

机译：在缺钾土壤中测试的柳枝Feed原料生产系统的经济评价

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Limited information is available about the economic benefits and costs associated with managing switchgrass (Panicum virgatum L.) produced for bioenergy feedstock in the K-deficient soils common in the southern Great Plains. The objectives of this study were to determine the most economical production system for harvesting and managing N and K fertilizations on switchgrass stands and to determine how sensitive the results are to various feedstock and fertilizer market price scenarios. A 4-year agronomic field experiment was conducted on a K-deficient site in South Central Oklahoma; the treatments included two harvest systems (summer and winter (SW) and winter only (W)), two N rates (0 and 135 kg ha−1), and two K rates (0 and 67 kg ha−1). Enterprise budgeting techniques and mixed ANOVA models were used to determine and compare the effects of eight harvest/N/K systems on yield, total cost, revenue, and net return. The harvest/N/K systems evaluated included SW/0/0, SW/0/67, SW/135/0, SW/135/67, W/0/0, W/0/67, W/135/0, and W/135/67. Results revealed the SW/135/67 system produced significantly (P > 0.0001) greater average yield compared to the other systems; however, the SW/0/0 system was the most (P > 0.0001) economical, realizing an average net return of $415 ha−1. Compared to the base–case net return of the SW/0/0 system, the value of the additional yield generated with the SW/135/67 system was less than the costs associated with the extra nutrients and additional harvest activity. For feedstock prices greater than $110 Mg−1, the most economical system shifted from the SW/0/0 to favor the SW/135/67 system.
机译：关于管理在大平原南部常见的缺钾土壤中为生物能源原料生产的柳枝（（Panicum virgatum L.）的经济效益和成本方面的信息有限。这项研究的目的是确定最经济的生产系统，用于收获和管理柳枝stands氮和钾肥，并确定结果对各种原料和肥料市场价格情况的敏感程度。在俄克拉荷马州中南部一个缺钾的地点进行了为期4年的农艺田间试验；处理包括两个收获系统（夏季和冬季（SW）和仅冬季（W）），两个氮素含量（0和135公斤公顷-1）和两个钾素含量（0和67公斤公顷-1）。企业预算技术和混合方差分析模型用于确定和比较八个收获/ N / K系统对产量，总成本，收入和净收益的影响。评估的收获/ N / K系统包括SW / 0/0，SW / 0/67，SW / 135/0，SW / 135/67，W / 0/0，W / 0/67，W / 135/0 ，和W / 135/67。结果表明，与其他系统相比，SW / 135/67系统的平均产量显着提高（P> 0.0001）。但是，SW / 0/0系统最经济（P> 0.0001），实现平均净回报为415美元/ ha-1。与SW / 0/0系统的基本情况净收益相比，SW / 135/67系统产生的额外产量的价值小于与额外养分和额外收获活动相关的成本。当原料价格高于$ 110 Mg-1时，最经济的系统从SW / 0/0转向SW / 135/67系统。

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