铁锌锰元素对矫治柠檬缺铁黄叶的研究

EFFECTS Of IRON,ZINC AND MANGANESE ON FOLIAR CHLOROSIS INDUCED BY DEFICIENCY IN IRON

对缺铁尤力克柠檬幼苗，喷施０．３％尿素铁或０．３％硫酸亚铁或与０．２％硫酸锌、０．２％硫酸锰３者混合喷施，可获得较好的矫治缺铁复绿效果。其中，尿素铁优于硫酸亚铁，尤以尿素铁与硫酸锌、硫酸锰混合喷施的效果最佳，其叶绿素含量可恢复到正常幼苗叶的水平。同时还探讨了有关矫治缺铁复绿的机理，铁锌锰元素间的相助作用和拮抗作用等问题。

The trial,carried out with the chlorosis lemon seedlings by four spraying treat-ments:0.3%urea-Fe,0.3%ferrous sulphate,0.3%urea-Fe +0.2%zinc sulphate,and0.3%ferrous sulphate +0.2%manganese sulphate, could obtain better result of re-vires-cence by correction of ferric deficiency.The urea-Fe presented a better effect than the fer-rous sulphate,especially while the former was combined rest1ectively with zinc sulphateand manganese sulphate,which restored the chlorophyll content in the seedling leaf to thenormal level.The mechanism of ferric deficient,correction,the antagpnism and promotioneffects between zinc and manganese were also discussed。