Cradle to farm gate life cycle assessment of strawberry production in the United States
Introduction
The total value of the United States (U.S.) strawberry production in 2014 was $2.4 billion and surpassed that of the fresh apple industry for the first time in 2010 (AgMRC, 2013). Strawberries are the fourth most valuable fruit produced in the U.S. and the total production of strawberry has been reported by the United States Department of Agriculture (USDA) as 1.4 million tonne in 2014 (USDA, 2015). Increasingly, producers, food retailers and consumers are becoming conscious of the environmental impacts of the products they produce, sell and/or consume. Therefore, assessing environmental impacts of strawberry production is essential to enable more sustainable production practices and to inform consumers of their choices. Communicating environmental impact information to stakeholders in an easy-to-understand format is critical for the move towards more sustainable production practices (Peano et al., 2015).
There are two main types of strawberry plants, distinguished by the date that they begin to produce fruit: June-bearing and day-neutral. June-bearing strawberries produce fruit in the late spring and early summer, while day-neutral strawberries produce their fruits continuously from early summer to fall (Demchak et al., 2010). In the U.S. strawberry transplants are used for strawberry production purposes and they mostly come from California nurseries. Strawberry transplants are produced from meristem plants after they are propagated under controlled conditions and numbers are increased up to three generations in nursery fields. Transplants are used to prevent transfer of diseases and pests to fruit production fields (Murthy et al., 2014). There are two main production systems for strawberries in the U.S.: matted-row and plasticulture. Matted-row production is an old and less expensive system in which strawberry plants are set out on cultivated lands at regularly spaced intervals within regularly spaced rows. This system allows strawberry runners to grow and establish daughter plants within the rows and it is also suitable for cooler regions. This system requires to be renovated each year. In the plasticulture system, strawberry plants are grown on raised beds covered with black plastic (plastic mulch). June-bearing and day-neutral strawberry plants can be cultivated under either system. The cultivated plants can be dormant plants or plug plants (plants grown from rooted runner tips) (Demchak et al., 2010). In recent years, plasticulture has become the main commercial growing system for strawberry production across most of the U.S. due to higher productivity and quality than the matted-row system (Fernandez et al., 2001, Poling, 2005).
A previous life cycle assessment (LCA) study for strawberry production in Italy indicated that most of the GHG emissions could be attributed to the plastics used in production (Girgenti et al., 2014). Similar studies were performed to assess life cycle impacts of strawberry production in Australia (Gunady et al., 2012), the United Kingdom (U.K.) and Spain (Williams et al., 2008). However, to date, there is no LCA for strawberry production in the U.S. to the best of our knowledge. This study represents the first LCA for strawberry production in the U.S. in multiple geographic locations. Life cycle environmental impacts depend strongly on geographic location and production practices. The main goal of this study was to perform LCA for strawberry production using the plasticulture method in four states across the U.S. A second goal of this paper was to propose simple producer/consumer friendly metrics that indicate the overall efficiency of nitrogen, phosphorous and fossil energy use during strawberry production.
Section snippets
Goal and scope definition
The primary goal of this study was to develop a cradle-to-farm-gate life cycle inventory (LCI) and assess the environmental impacts of the plasticulture method of non-organic strawberry production in four major strawberry producing states in the U.S.: California, Florida, North Carolina and Oregon. These four states produced 99% of strawberry in the U.S. from 2012 to 2014 (USDA, 2015). Obtaining high-quality LCI data is critical for a reliable LCA. Since such data do not as yet exist for
Results and discussion
Higher strawberry yields per ha generally corresponded to lower environmental impacts per kg of strawberry (Table 2). Strawberry yield and quality can be affected by day length, temperature, soil characteristics, altitude, latitude, cultivation system and management practices (Kruger et al., 2004) and the variation in strawberry yield among four states can be attributed to these factors. One of the most important factors was the climate (Palencia et al., 2013) which was totally different among
Conclusions
The use of modified enterprise budget sheets for collecting LCI data, while a worthy concept, was not very effective due to differences in production methods, which is reflected in differences in the format of enterprise budgets in different regions. Strawberry production varies greatly among geographic regions, and reliable LCAs for strawberry production can be performed only using datasets that are specific to a particular location. GWPs for strawberry production in California, Florida, North
Acknowledgments
This project was funded through a competitive grant to Oregon State University from the National Strawberry Sustainability Initiative (NSSI), University of Arkansas. The Walmart Foundation provides funds to the NSSI. The authors gratefully acknowledge the comments and critique provided by providers and reviewers of LCI data sets, collaborators at National Institute for Food and Agriculture and the USDA.
References (34)
- et al.
Energy balance in Iran's agronomy (1990–2006)
Renew. Sustain. Energy Rev.
(2010) - et al.
Energy use pattern analyses of greenhouse vegetable production
Energy
(2006) - et al.
An economic analysis of energy requirements and input costs for tomato production in Turkey
Renew. Energy
(2008) - et al.
From “farm to fork” strawberry system: current realities and potential innovative scenarios from life cycle assessment of non-renewable energy use and greenhouse gas emissions
Sci. Total Environ.
(2014) - et al.
Evaluating the global warming potential of the fresh produce supply chain for strawberries, romaine/cos lettuces (Lactuca sativa), and button mushrooms (Agaricus bisporus) in Western Australia using life cycle assessment (LCA)
J. Clean. Prod.
(2012) - et al.
A life cycle assessment of biodiesel derived from the “niche filling” energy crop camelina in the USA
Appl. Energy
(2012) - et al.
Energy inputs – yield relationship and cost analysis of kiwifruit production in Iran
Renew. Energy
(2010) - et al.
Green marketing tools for fruit growers associated groups: application of the Life Cycle Assessment (LCA) for strawberries and berry fruits ecobranding in northern Italy
J. Clean. Prod.
(2015) - et al.
Monte Carlo analysis of life cycle energy consumption and greenhouse gas (GHG) emission for biodiesel production from trap grease
J. Clean. Prod.
(2016) Agricultural Marketing Resource Center
(2013)
Impact of pesticides use in agriculture: their benefits and hazards
Interdiscip. Toxicol.
Estimation of the Greenhouse Gas Emissions from Agricultural Pesticide Manufacture and Use
Developing a Consistent Decision-making Framework by Using the U.S. EPA's TRACI
Sample Costs to Produce Strawberry
Strawberry Production
Introduction to Integrated Pest Management
Strawberry growth and development in an annual plasticulture system
HortScience
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2022, Cleaner and Responsible ConsumptionCitation Excerpt :As per consumers’ perspectives, these impacts can be mitigated by reducing food waste and electricity consumption. Tabatabaie and Murthy (2016) studied strawberries produced in the three largest strawberry producing states (California, Florida, and North Carolina), based on the strawberry enterprise budgets reported for each state. The results varied considerably by geographical regions, e.g., California had the lowest environmental impact while Florida had the highest, due to variations in the consumption of agricultural chemicals and varying yields.