Proximity, clump size and root distribution pattern in bamboo: A case study of Bambusa arundinacea (Retz.) Willd., Poaceae, in the Ultisols of Kerala, India
| Autor: | B. Mohan, B. N. Divakara |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Journal of Bamboo and Rattan. 1:43-58 |
| ISSN: | 1569-1594 1569-1586 |
| DOI: | 10.1163/156915901753313605 |
| Popis: | Root distribution pattern and competitiveness of bamboo ( Bambusa arundinacea (Retz.) Willd.) for below ground resources in mixed species systems were evaluated using logarithmic spiral trenching and 32 P soil injection techniques respectively. Excavation studies indicated that rooting intensity in different soil horizons declined either exponentially or quadratically with increasing lateral distance from the bamboo clump. Surface horizon (0- 10 cm) of the soil proe le showed the least bamboo rooting intensity. It was highest in the 10- 20 cm soil layer with nearly 27% of the total roots. Clump size is another important determinant of bamboo rooting intensity. Smaller bamboo crowns/clumps showed the lowest rooting intensity, when measured at 5 m and 7.5 m lateral distances and increased linearly with increasing crown radius. Implicit in this is the potential for management practices to regulate competition in mixed species systems through controlling clump size/crown expansion. Our results also showed that 32 P uptake by bamboo in binary combinations involving teak (Tectona grandis ) and vateria ( Vateria indica ) was proportional to bamboo rooting intensity, when the 32 P label was applied to the dicot trees. Root competitiveness in polycultural systems involving bamboo, therefore, is a function of the proximity of bamboo to the associated tree/crop, which in turn, decides the bamboo rooting intensity. |
| Databáze: | OpenAIRE |
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