【作者】 姚洪渭； 蒋彩英； 叶恭银； 胡萃； 彭于发；

【Author】 YAO Hong-wei JIANG Cai-yin YE Gong-yin HU Cui (State Key Laboratory of Rice Biology, Institute of Applied Entomology, Zhejiang University, Hangzhou 310029, China)

【机构】 浙江大学水稻生物学国家重点实验室应用昆虫学研究所； 中国农业科学研究院植物保护研究所；

【摘要】 通过2年田间调查,发现飘落在桑叶上的Bt水稻花粉数量随飘移距离增加而呈指数降低。2002年花粉平均累积飘落密度从稻田内的最高密度255．0粒／cm2降低至离田埂9m处的34．6粒／cm2。相似地,2003 年的水稻花粉平均飘落密度从稻田内的190．8粒／cm2锐降至离田埂9m处的6．0粒／cm2。Bt水稻花粉飘落密度随桑树植株高度增加而明显下隆。降雨可极显著减少Bt水稻花粉在桑叶上的飘落密度。更多还原

【Abstract】 The results of field investigation in 2002 and 2003 showed that the density of rice pollen grains on leaves of mulberry exponentially decreased with the increase of distance from edge of the rice field. In 2002, the average of cumulative deposition of Bt pollen grains was highest within the rice field (255.0 grains/cm2) and decreased to 34.6 grains/cm pollen al 9m from the edge of the field. Similarly in 2003, pollen load declined steeply from a mean of 190.8 grains/cm2 within the field to a mean of 6.0 grains/cm2 at a distance of 9m from the rice field. The deposition of pollen also declined with the increase of mulberry plant highness. Rainfall can highly significantly reduce the amounts of pollen on the mulberry leaves.更多还原