水稻花粉扩散源强估算方法研究

目的]验证二维通量积分法估算水稻花粉源强的可行性。方法]利用2008年南京开花期稻田水稻花粉扩散的源强试验资料，分析花粉在稻田上方的分布规律和影响因素，并利用二维通量积分法计算源强大小。结果]水稻花粉在源内的分布规律不受品种、田块面积的影响，花粉数量在下风方向逐步累积，随离中心距离的分布呈现倒“S”型规律，水稻冠层上方花粉浓度随高度增加而递减，影响冠层上方花粉分布的主要因素是稻田上方的风向、风速和开花量。两优培九花粉扩散源强为开花期花粉总量的1．8％，符合实际情况。结论]二维通量积分法是估算水稻花粉扩散源强简单而有效的方法。

Study on the Estimation Method of Source Strength in Pollen Dispersal

Objective]The purpose of this research was to demonstrate the feasibility of 2-D Flux integration method in estimating source strength.Method]Using the data obtained from dispersal experiment analyzed the distribution law and influence factors,the 2-D flux integral method was used to calculate the source strength.Result]The law of pollen diffusion above the field was unaffected by species and area,and always showed the inversed S type in leeward,and descending type in vertical direction because of the wi...