New Zealand Journal of Crop and Horticultural Science abstracts

---

Effects of nitrogen and potassium nutrition on soil-grown Sandersonia aurantiaca stem and tuber production

G. E. CLARK

New Zealand Institute for Crop & Food
Research Ltd
Pukekohe Research Centre
Pukekohe, New Zealand

Abstract  The effects of four nitrogen (N) application rates (5, 10, 20, 40 g N/m²) and four potassium (K) soil levels (0.4, 0.8, 1.8, 3.2 me/100 g) on soil-grown Sandersonia aurantiaca (Hook.) stem and tuber production were evaluated. Leaf concentrations of N and K declined with plant age but were greater at the higher N and K levels, respectively. Small increases in some stem production indices (flower number, percentage side laterals) occurred with increasing N but declined with increasing K (stem length). Tuber weights declined with increasing levels of N and K with the largest tubers, 7.9 g produced at 10 g/m² N and 1.8 me/100 g K. This study indicates that moderate N and K nutrition rates should be used for soil-grown sandersonia to optimise both stem production and tuber weights.

Keywords  Sandersonia aurantiaca; nitrogen; potassium; nutrition; soil; stem; tuber; vase life

New Zealand Journal of Crop and Horticultural Science, 1997, Vol. 25: 385-390

0114-0671/97/2504-0385 $7.00/0 (c) The Royal Society of New Zealand 1997

Short communication

PDF file of entire paper: medium quality (415K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page