【摘要】 在成龄元帅苹果树盛花初期喷布７种浓度的硼酸，结果表明，５０～８００ｍｇ／ｋｇ的硼酸液能显著和极显著地提高花朵坐果率和花序坐果率。花粉萌发试验结果表明，低浓度硼酸对花粉萌发有明显促进作用。但随着浓度的增加，花粉萌发受到抑制或出现畸形萌发，花粉管扭曲生长，说明高浓度的硼抑制了花粉萌发和花粉管的伸长更多还原

【Abstract】 The boric acid of 7 different concentrations was sprayed on adult marshal apple trees in early flowering phase The results show that 50-800×10 -6 boric acid liquor can improve fruiting rates of flower and inflorescence significantly. A test on pollen germination shows that the boric acid of a low concentration can promote pollen germination obviously,but when the concentration increases pollen germination is restrained or abnormal germination occurs and pollen tubes grow twistily.It is concluded that the boron of a high concentration would restrain pollen germination and stretch of pollen tubes.更多还原