Linkages between crop residues, termite prevalence, crop lodging and subsequent crop yield under conservation agriculture in Zimbabwe

Mutsamba, E.F and Nyagumbo, I (2010) Linkages between crop residues, termite prevalence, crop lodging and subsequent crop yield under conservation agriculture in Zimbabwe. In: Second RUFORUM Biennial Meeting, 20 - 24 September 2010,, Entebbe, Uganda.

[img]
Preview
PDF
2010 - Mutsamba - Conf.pdf

Download (23kB) | Preview

Abstract

Farmers believe that addition of residues to fields in conservation agriculture (CA) attract termites hence increase lodging, although they are beliefs that termites prefer feeding on dry matter and leave the crop. This study carried out in Kadoma and Chikombedzi, Zimbabwe established links between crop residues, termite prevalence, crop lodging and yield. Results from Kadoma showed that in 2008/9, 4t/ha of residue had significantly more termites compared to conventional mouldboard plough systems (CMP). In 2009/10, 4 and 6t/ha residues resulted into a significantly higher termite compared to CMP. In both seasons in Chikombedzi, results were similar with those of Kadoma. In Chikombedzi in 2009/10, lodging in CA was significantly higher compared to CMP. In Kadoma 2008/09, yields (2900-3348kg/ha) were significantly higher under CA compared to CMP (2117kg/ha). Similar results were obtained at Chikombedzi. A significant and positive relationship was observed between percentage soil moisture and termite numbers, suggesting that CA attract termites although it also increases yields. It is therefore necessary to integrate termite control measures in maize production under conservation agriculture systems. Key words: Humus, nutrient cycling, organic carbon, soil cover,

Item Type: Conference or Workshop Item (Paper)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Universities > State Universities > University of Zimbabwe
Depositing User: Research Database Administrator
Date Deposited: 07 Dec 2015 09:44
Last Modified: 07 Dec 2015 09:44
URI: http://researchdatabase.ac.zw/id/eprint/498

Actions (login required)

View Item View Item