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在柑桔生产中,氮素营养无疑是极其重要的。许多试验证明,柑桔需要施用大量氮肥,而且在一定范围内,施氮量与产量呈正相关。当前,叶片分析作为指导施肥的一种可靠手段,已在生产中应用。但对叶片分析在测定柑桔植株氮素营养的价值方面存在着不同的见解。不少学者如Rodriguez等(1977)、Guardiola(1977)等认为,柑桔叶片含氮量与产量之间有明显的相关性,而叶片含氮量的显著差异是氮素不同施用量的反映。但Bar-Akiva等
In the production of citrus, nitrogen nutrition is undoubtedly extremely important. Many experiments show that citrus need to apply a large amount of nitrogen fertilizer, and within a certain range, nitrogen application rate and yield were positively correlated. Currently, leaf analysis as a reliable means of guiding fertilization has been applied in production. However, there are different opinions on the value of leaf analysis in determining the nitrogen nutrition of citrus plants. According to Rodriguez et al. (1977) and Guardiola (1977), many scholars think that there is a clear correlation between the nitrogen content and the yield of citrus leaves. However, the significant difference of nitrogen content in leaves is the reflection of different nitrogen application rates. But Bar-Akiva and others