Jarosz Nathalie, Loubet Benjamin, Durand Brigitte, Foueillassar Xavier, Huber Laurent
INRA-EGC, 78850 Thiverval-Grignon, France.
Environ Sci Technol. 2005 Jun 15;39(12):4377-84. doi: 10.1021/es0494252.
The coexistence of genetically modified (GM) crops with conventional crops has become a subject of debate and inquiry. Maize (Zea mays L.) is one of the most cultivated crop plants in the world and there is a need to assess the risks of cross-pollination. Concentration and deposition rate downwind from different-sized maize crops were measured during three flowering seasons, together with micrometeorological conditions in the surrounding environment. Pollen release started once the air vapor pressure deficit (VPD) increases above 0.2 to 0.5 kPa. Moreover, the dynamics of release was correlated with the dynamics of VPD surrounding the tassels. Horizontal deposition appeared to follow a power law over short distance downwind from the source, and the dispersal distance increased with the source canopy height and the roughness length of the downwind canopy. This work also provides a data set containing both pollen measurements and contrasting weather conditions to validate dispersal models and further investigate maize pollen dispersal processes.
转基因作物与传统作物的共存已成为一个辩论和探究的主题。玉米（Zea mays L.）是世界上种植最广泛的作物之一，有必要评估异花授粉的风险。在三个开花季节测量了不同规模玉米作物下风向的花粉浓度和沉积速率，以及周围环境的微气象条件。一旦空气蒸汽压亏缺（VPD）增加到高于0.2至0.5千帕，花粉就开始释放。此外，释放动态与雄穗周围的VPD动态相关。水平沉积在源地下风向的短距离内似乎遵循幂律，并且扩散距离随着源冠层高度和下风向冠层的粗糙度长度而增加。这项工作还提供了一个包含花粉测量数据和对比天气条件的数据集，以验证扩散模型并进一步研究玉米花粉扩散过程。
