Improving the field performance of micro-and minitubers |
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Authors: | P C Struik W J M Lommen |
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Institution: | (1) Department of Plant Sciences, C.T. de Wit Graduate School for Production Ecology, Wageningen Agricultural University, Haarweg 333, 6709 RZ Wageningen, The Netherlands |
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Abstract: | Summary In many seed potato producing areas, micro- and minitubers are too small for direct planting as seed tubers in the field.
Such use of these propagules can, however, be feasible if the crop's growth and development can be advanced. Increasing light
interception, harvest index and yield of useable progeny tubers has been proved possible with plastic mulch and pre-planting
of small tubers in a greenhouse. High amounts of nitrogen (up to 180 kg ha−1) or deep planting (up to 9 cm) were less effective. Using older or pre-sprouted micro- or minitubers may be beneficial, because
this might increase the number of sprouts per mother tuber (and thus stems per plant) or advance the growth of sprouts or
stems. However, this would require even more careful management, due to the weakness of these sprouts and stems. Micro- and
minitubers should be as large as feasible when used for direct planting in the field. |
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Keywords: | plastic mulch transplanting nitrogen planting depth seed tuber weight physiological age radiation conversion efficiency harvest index |
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