一、前言关于林木叶片(或叶丛)矿质营养诊断的研究,国外从三十年代以来已做了很多工作,主要研究采样和诊断方法。矿质营养状况与生长的关系,营养诊断的理论意义和实际应用价值等等,但大多数集中于针叶树。我国近十多年来在橡胶和果树方面也开展了一些工作,而在林木特别是阔叶树方面,尚未见有关研究工作报导。在林业上,由于林木群体遗传型较混杂,森林土壤较复杂,立地条件差异和个体差异不易消除等原因,即使在国外目前还未象农艺那样普遍应用叶分析来指导制订合理的管理措施。但在人工林里,已被证明应用叶分析有着很大的希望(Leyton 1957)。应用此 I. Preface The research on the diagnosis of mineral nutrition of tree leaves (or leaves) has done a lot of work abroad since the 1930s, mainly studying sampling and diagnosis methods. The relationship between mineral nutrition and growth, the theoretical significance and practical value of nutrition diagnosis, etc., but most of them focus on conifers. In the past ten years or so, some work has been carried out on rubber and fruit trees in our country. However, no research work has been reported on trees, especially broad-leaved trees. In forestry, due to the mixed genetic tree structure, complex forest soil, site conditions and individual differences are not easy to eliminate and other reasons, even in foreign countries as far as agronomy has not yet applied leaf analysis to guide the development of appropriate management measures. However, in plantations, there has been great promise of using leaf analysis (Leyton 1957). Apply this