Temperature sensitivity of Swiss and British plant phenology from 1753 to 1958

Rutishauser, T.; Schleip, C.; Sparks, T.H.; Nordli, Ø.; Menzel, A.; Wanner, H.; Jeanneret, F.; Luterbacher, J.. 2009 Temperature sensitivity of Swiss and British plant phenology from 1753 to 1958. Climate Research, 39. 179-190.

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Integration of trees on farms may exert complementary or competitive effects on crop yield. This 4 year study examined novel systems in which Alnus acuminata (alnus), Calliandra calothyrsus (calliandra), Sesbania sesban (sesbania) or a mixture of all three were grown on the degraded upper part of bench terraces in Uganda; beans or maize were grown on the more fertile lower terrace during the short and long rains. Three pruning treatments (shoot, root or shoot ? root pruning) were applied to the tree rows adjacent to the crops; shoot prunings were applied as green manure to the woodlot from which they came. Pruning increased survival in calliandra and reduced survival in sesbania; alnus was unaffected. Pruning reduced tree height and stem diameter in alnus, but did not affect calliandra or sesbania. Maize yield adjacent to unpruned calliandra, alnus and sesbania or a mixture of all three was reduced by 48, 17, 6 and 24% relative to sole maize. Shoot pruning initially sustained crop performance but shoot ? root pruning became necessary when tree age exceeded 2 years; shoot ? root pruning increased maize yield by 88, 40, 11 and 31% in the calliandra, alnus, sesbania and tree mixture systems relative to unpruned trees. Bean yield adjacent to unpruned calliandra, alnus, sesbania and the tree mixture was 44, 31, 33 and 22% lower than in sole crops and pruning had no significant effect on crop yield. The results suggest that sesbania fallows may be used on the upper terrace without reducing crop yield on the lower terrace, whereas pruning of alnus is needed to sustain yield. Calliandra woodlots appear to be unsuitable as crop yield was reduced even after pruning.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Topics & Objectives 2009 - 2012 > Biodiversity
UKCEH and CEH Sections/Science Areas: Pywell
ISSN: 0936-577X
Additional Keywords: Alnus acuminate, beans, Calliandra calothyrsus, competition, maize, Sesbania sesban
NORA Subject Terms: Ecology and Environment
Date made live: 09 Mar 2017 16:02 +0 (UTC)

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