New Zealand Journal of Crop and Horticultural Science abstracts
Effect of production environments on radiation interception and radiation
use efficiency of potato (Solanum tuberosum) grown in Canterbury, New
Zealand
S. F. A. Shah*
B. A. McKenzie
R. E. Gaunt†
Soil, Plant and Ecological Sciences Division
Lincoln University
Canterbury, New Zealand
John W. Marshall
New Zealand Institute for Crop & Food
Research Ltd
Private Bag 4704
Christchurch, New Zealand
C. M. Frampton
Christchurch School of Medicine
University of Otago
P.O. Box 4345
Christchurch, New Zealand.
*Present address: New Zealand Institute for Crop & Food Research Ltd,
Private Bag 4704, Christchurch, New Zealand. Email: Shahf@crop.cri.nz
†Deceased
.
Abstract Four experiments were conducted over two growing
seasons during 1995/96 and 1996/97 at Lincoln University and New Zealand Institute
for Crop & Food Research, Lincoln, Canterbury, to assess whether radiation
interception (RI) alone is a good predictor of potato (Solanum tuberosum)
total dry matter (TDM) grown under different environments. In the two field
experiments production environments were altered by different rates of nitrogen
application and in bag experiments, the different production environments
were created with the presence of different amounts of potato cyst nematode
(Globodera rostochiensis) per ml of soil. The different production
environments significantly affected leaf area index (LAI), RI, radiation
use efficiency (RUE), and TDM. Increased soil fertility significantly increased
RI, RUE, and TDM where as the presence of potato cyst nematode significantly
decreased RI, RUE, and TDM. There was a strong (P < 0.001) positive linear
relationship between RUE and applied nitrogen, whereas there was a linear,
negative relationship between RUE and the numbers of potato cyst nematode
per ml of soil. On the basis of this study it was concluded that under different
production environments both RI and RUE must be known to accurately predict
the TDM of potatoes.
Keywords potato; Solanum tuberosum; radiation
interception; radiation use efficiency; nitrogen; production environments;
potato cyst nematode; Globodera rostochiensis
H03030; Online publication date 17 March 2004; Received 24 March 2003;
accepted 17 October 2003
New Zealand Journal of Crop and Horticultural Science, 2004, Vol. 32:
113-119
0014-0671/04/3201-0113 © The Royal Society of New Zealand 2004
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