Almond by‐product composition impacts the rearing of black soldier fly larvae and quality of the spent substrate as a soil amendment
Open Access
- 17 May 2020
- journal article
- research article
- Published by Wiley in Journal of the Science of Food and Agriculture
- Vol. 100 (12), 4618-4626
- https://doi.org/10.1002/jsfa.10522
Abstract
BACKGROUND Insect biomass is a sustainable alternative to traditional animal feeds, particularly when insects are produced on low-value high-volume agricultural by-products. Seven samples of almond by-product (hulls and shells) were obtained from processors in California and investigated for larvae production. Experiments were completed with and without larvae and spent substrate samples were assessed for their potential as soil amendments based on standard compost quality indicators. RESULTS On average, specific larvae growth and average larval harvest weight were 158% and 109% higher, respectively, when larvae were reared on Monterey and pollinator hulls compared to nonpareil hulls and mixed shells. Larvae methionine and cystine contents were highest when larvae were reared on Monterey hulls and mixed shells, respectively. Available phytonutrients in spent substrate were affected by feedstock sample and larvae rearing. Spent nonpareil substrate without larvae had the highest NH4-N levels and spent pollinator substrate incubated without larvae had the highest PO4-P levels. Spent mixed shell substrate had the lowest availability of phytonutrients. CONCLUSION The findings demonstrate that by-product composition has a significant impact on larvae growth and the properties of the spent substrate, and that spent substrate from larvae rearing requires further stabilization before application as a soil amendment. © 2020 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.Keywords
Funding Information
- Almond Board of California (project 17‐VandergheynstJ‐COC‐01)
- Division of Chemical, Bioengineering, Environmental, and Transport Systems (1438694)
This publication has 34 references indexed in Scilit:
- Discovery of Microorganisms and Enzymes Involved in High-Solids Decomposition of Rice Straw Using Metagenomic AnalysesPLOS ONE, 2013
- Biological Treatment of Municipal Organic Waste using Black Soldier Fly LarvaeWaste and Biomass Valorization, 2011
- Conversion of organic material by black soldier fly larvae: establishing optimal feeding ratesWaste Management & Research: The Journal for a Sustainable Circular Economy, 2009
- Development of Black Soldier Fly (Diptera: Stratiomyidae) Larvae Fed Dairy ManureEnvironmental Entomology, 2008
- Evaluation of maturity parameters and heavy metal contents in composts made from animal manureWaste Management, 2007
- Use of a germination bioassay to test compost maturity of willow (Salixsp.) sawdustNew Zealand Journal of Crop and Horticultural Science, 2002
- Improvement of soil solarization with volatile compounds generated from organic AmendmentsPhytoparasitica, 1997
- Effects of composting on phytotoxicity of spent pig-manure sawdust litterEnvironmental Pollution, 1996
- Rapid direct determination of ammonium and nitrate in soil and plant tissue extractsCommunications in Soil Science and Plant Analysis, 1990
- Metabolic shift from lipogenesis to glycogenesis in the last instar larval fat body of the silkworm, Bombyx moriInsect Biochemistry, 1986