Nutrient-Use and Carbon-Sequestration Efficiencies in Soils from Different Organic Wastes in Rice and Tomato Cultivation

Abstract

Effects of household waste, chicken manure, and cow dung on nutrient-use and carbon (C)–sequestration efficiencies and improvement of soil fertility were assessed. Application of household waste at the rate of 4 kg m⁻² and cow dung at the rate of 3 kg m⁻² produced the maximum yields of rice and tomato, respectively. Nutrient uptake and use efficiency were enhanced with the application of wastes. Incorporation of wastes increased C content and decreased bulk density of soils. The maximum C sequestrations were 2.6 Mg ha⁻¹ in soils under rice cultivation and 2.9 Mg ha⁻¹ under tomato cultivation when household waste was applied at the rate of 4 kg m⁻². The greater agronomic, physiological, and recovery efficiencies of nitrogen, phosphorus, and potassium were attributed to the greater sequestration of C in soils. The residual value of pH, organic matter, nitrogen, phosphorus, and potassium indicated the fertility enhancement of soils with the application of wastes.

Keywords:

• Carbon sequestration
• chicken manure
• cow dung
• household waste
• nutrient-use efficiency
• rice
• tomato

Acknowledgment

The study was supported by Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh, endowment fund administered by Research Management Committee (RMC).