Actual and potential yield levels of potato in different production systems of Japan

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dc.contributor.author Deguchi, T.
dc.contributor.author Iwama, K.
dc.contributor.author Haverkort, A.J. (Anton)
dc.date.accessioned 2017-03-01T10:38:30Z
dc.date.available 2017-03-01T10:38:30Z
dc.date.issued 2016-09
dc.description.abstract Japan annually produces 2.4 million tons of potato on 79,700 ha. There are four cropping seasons stretching from 24° to 45° N: a winter crop at Okinawa, spring and autumn crops at Kyushu and southern Honshu, and a single summer crop at Hokkaido. Using the crop growth model LINTUL-POTATO-DSS, actual yields were compared with potential yields. The spring and summer crop yields of all prefectures varied from 10 to 43 t ha−1 and were 16t ha−1on average (not weighted by area) ; the actual/potential yield ratio varied between0.21 and 0.63 and was 0.40 on average (not weighted). Actual and potential yields of the autumn crops were half those of the spring crops. Actual yields of the Hokkaido summer crops in 21 years decreased from 35 to 32 tha−1 because of a change of varieties where as potential yield remained stable at 56 tha−1. Increased temperature would reduce the potential yield to 53 tha−1 but would move it up to 60 t ha−1 by lengthening the growing season and to 77 t ha−1 when the CO2 effect on growth is taken into account. The actual/potential yield ratio at Hokkaido was bench marked against that of other growing regions in the world, showing that this area compares well with that of other efficient production systems in northern Europe and America. en_ZA
dc.description.department Plant Production and Soil Science en_ZA
dc.description.librarian hb2017 en_ZA
dc.description.sponsorship This study was made possible by a grant of Hoikkaido University allowing Dr. Haverkort to spend two months in 2015 at the Department of Agriculture. en_ZA
dc.description.uri http://link.springer.com/journal/11540 en_ZA
dc.identifier.citation Deguchi, T., Iwama, K. & Haverkort, A.J. Actual and potential yield levels of potato in different production systems of Japan. Potato Research. (2016) 59: 207-225. doi:10.1007/s11540-016-9322-z. en_ZA
dc.identifier.issn 0014-3065 (print)
dc.identifier.issn 1871-4528 (online)
dc.identifier.other 10.1007/s11540-016-9322-z
dc.identifier.uri http://hdl.handle.net/2263/59215
dc.language.iso en en_ZA
dc.publisher Springer en_ZA
dc.rights © The Author(s) 2016. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution 4.0. en_ZA
dc.subject Attainable yield en_ZA
dc.subject Climate change en_ZA
dc.subject Crop model en_ZA
dc.subject Latitude en_ZA
dc.subject Solanum tuberosum L. en_ZA
dc.subject Systems analysis en_ZA
dc.title Actual and potential yield levels of potato in different production systems of Japan en_ZA
dc.type Article en_ZA


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