Modelling diurnal and seasonal patterns of maize pollen emission in relation to meteorological factors

被引:23
作者
Marceau, Alexis [1 ,2 ]
Loubet, Benjamin [1 ]
Andrieu, Bruno [1 ]
Durand, Brigitte [1 ]
Foueillassar, Xavier [2 ]
Huber, Laurent [1 ]
机构
[1] INRA, UMR 1091, F-78850 Thiverval Grignon, France
[2] Arvalis, Inst Vegetal, F-64121 Montardon, France
关键词
Zea mays; Pollen emission; Anthesis; Cross pollination; Tree-based model; Development model; ZEA-MAYS L; KERNEL SET; FLOWERING CHARACTERISTICS; AIRBORNE CONCENTRATION; ANTHER DEHISCENCE; CROSS-POLLINATION; DEPOSITION RATE; CORN POLLEN; DISPERSAL; DYNAMICS;
D O I
10.1016/j.agrformet.2010.08.012
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Modelling the risk of cross-pollination between maize crops can help to define efficient isolation methods to reduce the risk of gene flow between these crops However the use of such models over the pollen emission season is limited by poor estimations of pollen emission In this study we present a model that predicts hourly pollen emission fluxes over the pollen season and that accounts for effects of both meteorological conditions and crop variety It consists of two sub-models that predict (i) the seasonal pattern on a daily basis and (ii) the normalized diurnal pattern on an hourly basis To assess the variability of pollen emission ten field experiments were carried out in July and August over four years using three crop varieties The model was built from (i) a parameterisation of the measured diurnal and seasonal patterns of pollen emission followed by (ii) a quantification of the relationships between parameter values and meteorological conditions Total production of pollen was fairly constant for a given variety over years and sowing dates while patterns of emission varied with meteorological conditions The pollen emission season was longer when temperature was low and humidity was high In most cases the diurnal pattern was unimodal the onset and the peak of emission were delayed when relative humidity was high or wind speed was low In some cases a second peak of emission occurred during the afternoon This was observed more frequently when temperatures were high (C) 2010 Elsevier B V All rights reserved
引用
收藏
页码:11 / 21
页数:11
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