Productivity and carbon dioxide sequestration capacity of organic and conventional maize (Zea mays L.) production system / Annalissa Lappay-Aquino ; Pompe C. Sta. Cruz, chair, advisory committee.

Date

1-2015

Abstract

The study was conducted at the Central Experiment Station (CES), Pili Drive, UP Los Baños (UPLB), College Laguna, Philippines from June to September 2012 for the wet season experiment, and from February 2013 to May 2013 for the dry season experiment to evaluate the growth, yield, nutrient use efficiency and carbon sequestration capacity of high-yielding and farmer selected open pollinated corn varieties in organic and conventional production systems. The study was also conducted to establish the relationship between CO sub 2 sequestration and yield levels in organic and conventional corn production systems, determine the potential contribution of organic and conventional production systems on CO sub 2 sequestration, and estimate and compare the environmental impacts of organic and conventional corn production systems in terms of their greenhouse gases (GHG) emission using simplified life cycle assessment. Conventional production or the application of inorganic fertilizer enhanced the growth, physiological performance and nutrient use efficiency of both varieties but failed to maintain the yield level. The application of organic fertilizer increased the plant carbon sequestration of USM Var 10 by promoting plant growth and consequently biomass production while the application of vermicompost promoted higher soil carbon sequestration. Based on GHG emission and atmospheric acidification, the environmental impact of producing 1 kg of seed under organic production system turned out to be lower making it more environmentally efficient than conventional production. Applying 10 t/ha of vermicompost on both cultivars under study was the most environmentally efficient practice to produce 1 kg of seeds.

Document Type

Dissertation

Degree

Doctor of Philosophy in Agronomy

College

Graduate School (GS)

Adviser/Committee Chair

Pompe C. Sta. Cruz

Committee Member

Pompe C. Sta. Cruz, Edna A. Aguilar, Rodel D. Lasco, Constancio C. De Guzman

Language

English

LC Subject

Corn -- Philippines, Agronomy College of Agriculture and Food Science

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 996 2015 A42 L37

This document is currently not available here.

Share

COinS