Phosphorus requirements for containerized Pterocarpus indicus seedlings

Lok, E.H. and Dell, B. (2015) Phosphorus requirements for containerized Pterocarpus indicus seedlings. Journal of Forestry Research, 26 (3). pp. 657-662.

Abstract

Pterocarpus indicus Willd is a tropical woody legume that holds promise for plantation forestry. Two glasshouse experiments were undertaken on two soil types to determine the phosphorus (P) concentration ranges in the foliage of P-stressed and healthy plants, and to define critical P concentrations for the diagnosis of deficiency and toxicity. There was a narrow range in rates of P fertilizer, supplied as Ca(H2PO4)2·H20, between deficiency and toxicity compared to other tree species. The relationship between shoot yield and P concentration in the youngest fully expanded leaf enabled critical P concentrations for the diagnosis of deficiency (0.17 %) and toxicity (0.41 %) to be determined at 90 % maximum yield from linear regressions fitted to the data. The foliar P concentration ranges for deficiency and toxicity were similar to other nitrogen-fixing trees. The defined P concentration ranges and the critical P concentrations for the diagnosis of P deficiency and P toxicity should be useful for monitoring the P status of nursery stock and the health of young seedlings after out-planting.

Item Type:	Journal Article
Murdoch Affiliation:	School of Veterinary and Life Sciences
Publisher:	Springer
Copyright:	© 2015 Northeast Forestry University and Springer-Verlag Berlin Heidelberg
URI:	http://researchrepository.murdoch.edu.au/id/eprint/26613

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