【摘要】 在桃树果实膨大期喷施ＬａＣｌ３（１５ｍｇ／Ｌρ）３次，能明显提高桃树座果率和单果重，增加产量，改善品质．实验显示，这与稀土镧增加桃树叶片叶绿素含量，提高光合速率，比叶重，希尔反应活力，硝酸还原酶活性，促进光合产物输出等多重生理学作用相关．更多还原

【Abstract】 LaCl 3(15 mg/L ρ) was sprayed three times on the leaves of peach tree at fruit development stage. It could increase fruit set percentage, single fruit weight, total yield and improve fruit quality. The study indicated that these increments were related to the increases in chlorophyll content, photosynthetic rate, specific leaf weight, Hill reaction activity, nitrate redutase, hydrogen peroxidase, invertase and promotion of the export of assimilates.更多还原