Abstract

Cotton gin trash, the by-product of the cotton ginning industry which is produced in large quantities every year, can be utilized as feedstock for deriving high quality organic materials such as biochar, compost and co-composted derivates for improvement of soils’ key physical, chemical and biological properties. This is the first report in which cotton gin trash was both thermally and biologically converted at the same time into biochar (BC), compost (C) and co-compost (Coc), and their effects on soil properties and on plant performance were examined. In order to find the optimum rate, the products were used as soil amendments in a greenhouse experiment at 2.5 t ha−1, 5 t ha−1and 10 t ha−1 rates. All of the amendments contributed in improving the soil properties and provided agronomic benefits to plants, however plants (radish var. Cherry belle) showed significantly (p < 0.05) better growth attributes and almost a 315% increase in biomass yield observed when co-composted biochar (10 t ha−1) was applied to the soil, thus suggesting its role in compensating fertilizer application. Amendments (2.5 and 5.0 t ha−1) considerably increased plant growth parameters; however, differences between 5 and 10 t ha−1 amendments were not so significant. As a result, replenishing soil with Coc (5 t ha−1) on a regular basis can promote plant growth and improve soil qualities over time.

Highlights

  • Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations

  • A byproduct of the ginning industry, consists of small sticks, leaves, cottonseed, hulls, and burrs [3]. This trash is rich in nitrogen, phosphorus, potassium and other micronutrients that can be added to soil for plant growth

  • Cotton gin trash was gathered from Varisco Cotton Gin, Brazos County, Texas, USA

Read more

Summary

Introduction

The cotton industry generates approximately 50 million tons of waste biomass each year [2]. A byproduct of the ginning industry, consists of small sticks, leaves, cottonseed, hulls, and burrs [3]. This trash is rich in nitrogen, phosphorus, potassium and other micronutrients that can be added to soil for plant growth. It cannot be re-used directly as a soil amendment due to the presence of 22% permanganate lignin, which delays its decomposition rate [2]

Objectives
Methods
Discussion
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call