New Zealand Journal of Crop and Horticultural Science abstracts

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Nutrition of container-grown Radermachera sinica Hemsl.

M. B. THOMAS
M. I. SPURWAY
B. A. J. RICHARDS

Department of Plant Science
Lincoln University
Canterbury, New Zealand

Abstract  Seedlings of Radermachera sinica Hemsl. were grown in peat/composted bark (7:3, v/v) medium to evaluate their response to five levels of nitrogen (N), phosphorus (P), potassium (K), and lime. R. sinica proved to be an adaptable species quite tolerant of nutrient extremes. There was a strong response to added N with an optimum at 300 g N/m³, equivalent to 85 g N/m³ per month and a leaf N content of 2.5%. P, and more noticeably K, had little influence on foliage growth and consequently there were few nutrient interactions. Optimum P additions were at c. 200 g P/m³ or a leaf P content of 0.35%, whereas high P fertilisation depressed foliage growth. The lime rate for optimum growth was at 6 kg/m³ and pH 4.8.

Keywords  Radermachera sinica; nutrition; foliage plants

New Zealand Journal of Crop and Horticultural Science, 1995, Vol. 23: 461-465

0114-0671/95/2304-0461 $2.50/0 (c) The Royal Society of New Zealand 1995

PDF file of entire paper: medium quality (314K); (scanned from paper original: notes about this process)

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