RESEARCH ARTICLE


Mixed Cropping of Dwarf Napiergrass (Pennisetum purpureum cv. Mott) with Indigofera (Indigofera zollingeriana) using an Alley Cropping System



Renny Fatmyah Utamy1, Herry Sonjaya1, Yasuyuki Ishii2, *, Syamsuddin Hasan3, Maulina Nazira4, Mujtahida Taufik4, Etrid Januarti4
1 Department of Animal Production, Faculty of Animal Science, University of Hasanuddin, Makassar 90245, Indonesia
2 Department of Animal and Grassland Sciences, Faculty of Agriculture, University of Miyazaki889-2192, Japan
3 Department of Animal Nutrition, Faculty of Animal Science, University of Hasanuddin, Makassar 90245, Indonesia
4 Graduate School of Animal Science, University of Hasanuddin, Makassar 90245, Indonesia


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Creative Commons License
© 2021 Utamy et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Animal and Grassland Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan; E-mail; yishii@cc.miyazaki-u.ac.jp


Abstract

Background:

Mixed cropping of forage grasses and legumes can potentially improve the performance of herbivores. However, the feasibility of grasses mixed-cropped with legumes should be examined at different plant densities.

Aim:

This study aimed to evaluate the growth characters and forage chemical composition in dwarf napiergrass (Pennisetum purpureum cv. Mott) with Indigofera (Indigofera zollingeriana) grown using alley cropping.

Methods:

Three densities of dwarf napiergrass with Indigofera, i.e., high density (2 and 1 plants m-2, respectively); medium density (1.33 and 1 plants m-2, respectively); and low density (1 and 1 plants m-2, respectively) were applied under rainfed conditions in Makassar.

Results:

Plant density significantly affected growth characteristics, such as plant height and tiller density in dwarf napiergrass (p<0.05), and non-significantly affected plant height and branch density (p>0.05) in Indigofera. Plant density did not affect the yielding ability at the first defoliation and annual total of yields (p>0.05), except at the second defoliation when the dry matter production of dwarf napiergrass peaked in the low plant density treatment (p<0.05). In terms of chemical composition, plant density significantly affected fiber concentrations of acid detergent fiber and neutral detergent fiber, which were lowest at low plant densities (p<0.05). The acid detergent lignin and cellulose concentrations tended to be lower at low plant densities, but the differences were not significant (p>0.05).

Conclusion:

We consider that alley cropping systems for dwarf napiergrass and Indigofera are suitable if low plant densities are employed in the region.

Keywords: Chemical composition, Dry matter yield, Dwarf napiergrass, Indigofera, Plant density, Alley cropping system.