How profitable is switchgrass in Illinois, USA? An economic definition of marginal land  

作　　者：Nictor Namoi David Archer Todd S.Rosenstock Chunhwa Jang Cheng‐Hsien Lin Arvid Boe DoKyoung Lee 

机构地区：[1]Department of Crop Sciences,University of Illinois at Urbana‐Champaign,Urbana,Illinois,USA [2]USDA Agricultural Research Service,Northern Great Plains Research Laboratory,Mandan,North Dakota,USA [3]World Agroforestry Center,Nairobi,Kenya [4]Department of Soil and Environmental Sciences,National Chung Hsing University,Taichung City,Taiwan,China [5]Department of Agronomy,Horticulture,and Plant Science,South Dakota State University,Brookings,South Dakota,USA

出　　处：《Grassland Research》2022年第2期111-122,共12页草地研究（英文）

基　　金：supported by the University of Illinois at Urbana‐Champaign Hatch Project(1001878);the US Department of Energy,Energy Efficiency and Renewable Energy(EERE),Bioenergy Technologies Office(BETO),grant number DE‐EE0008521.

摘　　要：Background:Decisions regarding the conversion of land from an existing crop to bioenergy crops are critical for the sustainable production of both food and fuels.This study seeks to establish criteria for delineating land as“economically marginal”,and thus suited for growing switchgrass.Methods:In this case study of an Illinois agricultural field,the profitability of switchgrass,with farmgate prices of$44 Mg−1,$66 Mg−1,or$88 Mg−1,was compared to corn and soybean crop prices.Further,the study also evaluates the profitability of switchgrass when replacing corn‐based yield estimates from the Soil Productivity Index(SPI)of Illinois.Results:Based on a dry‐matter yield of 10.45 Mg ha−1,switchgrass can compete with soybeans only at the high price of$88 Mg−1,but depending on location,can compete with corn at$66 Mg−1.Across Illinois,at$88 ha−1,all Illinois land with SPI<100%and 95%of land under SPI class C(SPI 100–116)is profitable under switchgrass.Switchgrass may not be profitable relative to corn grown in the SPI class A(SPI>133)and only 7%of class B(SPI 117–132).Conclusions:Our results show that land with drainage and erosion limitations is economically marginal when corn and soybean yields are low,and the farmgate price for switchgrass is greater than$66 Mg−1.However,this may not be possible on land where switchgrass is replacing frequent soybean rotations(corn–soybean ratio≤1).Land used to produce only soybeans may only be marginal at the farmgate price of$88 Mg−1.Further studies need to be conducted to identify how much land can be converted to switchgrass without harming corn production.

关 键 词：BIOENERGY economically marginal marginal land Soil Productivity Index(SPI) SWITCHGRASS 

分 类 号：F42[经济管理—产业经济]