摘要
[目的]研究澳洲坚果生育期内叶片中矿质营养元素的含量及变化规律。[方法]以贵州主栽的3个澳洲坚果品种H2、OC、788的成年树为研究对象，测定其叶片中N、P、K、Ca、Mg、Fe、Cu这7种矿质营养元素的含量及变化规律。[结果]3个澳洲坚果品种叶片中7种矿质元素含量在生育期内呈现规律性变化，平均含量从大到小依次为N、Ca、K、P、Mg，Fe、Cu。 OC叶片中的N、P、K、Ca、Fe平均含量要大于H2和788。叶片中N和Mg含量是逐渐升高的，P含量先增后减，K含量是先减后增，Ca含量逐渐下降，Fe含量变化呈现倒“V”字型，变化幅度剧烈，而Cu含量呈“V”字型变化。 P与Cu含量达极显著负相关，Mg与Ca含量达显著负相关。[结论]该试验可为贵州澳洲坚果合理施肥提供理论依据。
Abstract
Objective] To investigate the contents and dynamic variation characteristic of mineral elements in Macadamia ternifolia leaves dur-ing the growth period.[Method] Taking H2, OC, 788 which were the main cultivated M.ternifolia varieties in Guizhou Province as the study object, mineral elements content and variation law were determined.[Result]The results showed that the contents of 7 kind of mineral ele-ments indicated regular change in the leaves of three M.ternifolia varieties.The order of mean content of nutrient elements from large to small was N, Ca, K, P, Mg, Fe, Cu.The contents of N, P, K, Ca, Fe in OC variety were higher than that in H2 and 788 species.The contents of N and Mg in the leaves were increased gradually;the content of P firstly increased, then decreased; K contents of M.ternifolia leaves de-creased and then increased; the quantity of Ca in leaves was decreased;Fe contents change presented inverted "V"type, and had a big change range;the contents of Cu showed the "V"type change.The contents of P and Cu change reached extremely significant negative corre-lation, while significant negative correlation existed between Ca and Mg contents.[ Conclusion] The study can provide theoretical guidance for rational fertilization of M.ternifolia in Guizhou Province.
基金项目
贵州省农业科学院项目(黔农科院院专项［2013］021号)
贵州省农业科学院项目(黔农科院自主创新科研专项字［2014］001号)
贵州省科研机构服务企业行动计划(黔科合服企［2015］4002号)
国家科技期刊平台
NSTL
维普
万方数据