喷施硼锌镁对提高锦橙产量和果实品质的影响

锦橙叶面喷施硼酸、硫酸锌、硫酸镁溶液后，花粉发芽率提高，药粉管显著伸长，尤以喷镁的为最。还可提高座果率和果实产量、品质，其中，喷施硼酸的效果最佳，可显著提高产量，并便果实增大、着色好、降低总酸量、提高总糖量、增加糖酸比和固酸比。喷施硫酸锌，可增加果实叶蔗糖含量和增进果皮的光滑度。本文还对硼锌镁元素提高座果率，产量和果实品质的机理进行了探讨。

LEAF SPRAYING WItH BORON,ZINC AND MAGNESIUM AND THEIR EFFECTS ON THE FKUIT PROOUCTION AND QUALITY OF JINGCHEN ORANGES(CITRUS SINENSIS OSBECK)

The fruit set,yield and. uality of jingchen oranges could be improved in varyingfoliar applications of H3BO3,ZnSO4 and MgSO4 solutions,and boron.Of the best resultsare yield,fruit weight,coloration,sugars/acids and soluble substances/acids,The applica-tion of ZnSO4 increased the saccharose contet in fruit and at the same time enhanced thefruit brilliance.The spraying treatments gave respectively a higher pollen germination andlonger pollen tube allogement than the contrast,especially for MgSO4 utilization.Some ofthe mechanisms of the mineral elements related to the fruit set,yield and quality have alsobeen discussed in this paper.