纽荷尔脐橙缺硼表现与其硼、糖含量年变化的关系

 研究了赣南‘纽荷尔’和‘朋娜’脐橙果实及叶片的硼和可溶性糖含量的年变化。结果表明: 幼果期两品种果皮硼含量均较高, 之后果皮与果肉硼含量均趋下降, 但在果实膨大中后期均出现显著上升。纽荷尔越冬老叶硼含量趋明显下降并居较低水平, 而朋娜老叶硼含量变幅小且相对较高。果实膨大中后期两品种果皮和果肉的可溶性糖含量均与果实硼含量出现同步积累, 此时二者老叶和朋娜春梢叶的糖含量均出现低谷, 而对应纽荷尔春梢叶糖含量并无明显下降。

Relationship between Boron Deficiency Occurrence and Annual Changes in Contents of Boron and Sugar of Newhall Navel Orange

Annual changes of boron(B) and soluble sugar(SS) concentrations were investigated in fruits and leaves of both Newhall (Citrus sinensis Osbeck) and Skagg's Bonanza(C.sinensis Osbeck)navel orange in the south part of Jiangxi province. The results showed that B concentrations in the rind were relatively high during fruitlet growth, and then those of both rind and pulp decreased, while the significant increases of B concentrations were detected in both rind and pulp from the two cultivars during middle and late fruit enlargement. Meanwhile, B concentration decreased progressively and remained relatively low in old leaves from last season of Newhall, whereas was relatively high and changed little in old leaves from Skagg's Bonanza. During the middle and late stage of fruit enlargement, SS concentrations in both rind and pulp from the two cultivars accumulated significantly in accordance with B of them, meanwhile, notable decreases were presented for SS both in old leaves from the two cultivars and in spring-flush leaves from Skagg's Bonanza, whereas no obvious decrease was found for SS in spring-flush leaves of Newhall.