用快速和标准方法分析叶柄汁液营养成分及其与施肥后的嘎啦苹果叶片分析的关系

IF 3.1 3区 农林科学 Q1 HORTICULTURE
Mariana Mota, M. J. Martins, L. Sprey, Anabela Maurício, Cristina Rosa, João Faria, Miguel B. Martins, M. L. De Sousa, Ricardo Santos, Rui M. de Sousa, Henrique Ribeiro, C. Oliveira
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引用次数: 0

摘要

目前,苹果园的施肥决策是根据土壤和叶片分析结果做出的,而叶片材料是在生长季节结束后取样的,通常是在 6-7 月份(盛花期后 90-110 天)。这种方法效率很低,因为获得信息的时间晚于生长季节,因此只能为下一年的施肥决策提供支持,而不能为当年的施肥决策提供支持。为了建立一种在生长周期早期就能为施肥决策提供有用信息的方法,我们的研究重点是使用不同的方法(标准方法和使用反射仪的快速方法)评估叶柄汁液的养分含量。在这项研究中,我们于 2021 年对四个 "嘎啦 "果园施用了不同水平的氮磷钾肥。使用标准实验室方法和反射仪测定了盛花期(DAFB)后 45 天和 90-110 天的叶片和叶柄汁液中的宏量和微量营养元素。将盛花后 45 天和 90-110 天的叶片分析与同一时间点的叶柄汁液分析进行比较,发现叶片材料和叶柄汁液中的营养成分含量之间没有显著的相关性,钙除外。不过,反射仪测定结果与标准实验室分析结果之间的相关性呈正相关。回归分析表明,标准实验室方法和反射仪对 N-NO3- (R2 = 0.703)、K+ (R2 = 0.705)、Ca2+ (R2 = 0.715) 和 Mg2+ (R2 = 0.780) 的测定系数较高。这些结果表明,反射仪是一种实时诊断工具,可用于监测整个生长周期的养分状况,尤其是与果实品质相关的关键养分。N-P-K 施肥策略对叶片或叶柄汁液的养分含量没有影响。两种样本类型的养分含量因果园而异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Analysis of Petiole Sap Nutrients Using Rapid and Standard Methods and Its Relation to Leaf Analysis of Fertilized Malus domestica cv. Gala
Currently, fertilization decisions in apple orchards are based on soil and leaf analyses while the leaf material is sampled after the growing season, usually in June–July (90–110 days after full bloom). This approach is inefficient, as the information becomes available later than the growing season and is therefore only useful in supporting fertilization decisions for the next year, not the current one. To establish a method that provides useful information for fertilization decisions earlier in the growth cycle, our research focused on the assessment of the nutrient content of petiole sap using different methods, the standard method and the rapid method using a reflectometer. For this study, in 2021, four ‘Gala’ orchards were fertilized with different N–P–K levels. Macro and micronutrients were determined in leaves and petiole sap at 45 and 90–110 days after full bloom (DAFB) using standard laboratory methods and the reflectometer. When leaf analysis at 45 and 90–110 DAFB was compared with petiole sap analysis at the same time point, no significant correlations were found between the nutrient contents in leaf material and petiole sap, with the exception of calcium. However, positive results were obtained regarding the correlation between reflectometer determination and standard laboratory analyses. The regression analysis revealed high determination coefficients for N-NO3− (R2 = 0.703), K+ (R2 = 0.705), Ca2+ (R2 = 0.715), and Mg2+ (R2 = 0.780) between standard laboratory methods and the reflectometer. These results suggest that the reflectometer enables a real-time diagnostic tool for monitoring nutrient status throughout the growth cycle, particularly key nutrients related to fruit quality. The N–P–K fertilization strategies had no influence on the nutrient content of leaves or petiole sap. The nutrient content of both sample types varied depending on the orchard.
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来源期刊
Horticulturae
Horticulturae HORTICULTURE-
CiteScore
3.50
自引率
19.40%
发文量
998
期刊介绍: Horticulturae (ISSN 2311-7524) is an international, multidisciplinary, peer-reviewed, open access journal focusing on all areas and aspects of temperate to tropical horticulture. It publishes original empirical and theoretical research articles, short communications, reviews, and opinion articles. We intend to encourage scientists to publish and communicate their results concerning all branches of horticulture in a timely manner and in an open venue, after being evaluated by the journal editors and randomly selected independent expert reviewers, so that all articles will never be judged in relation to how much they confirm or criticize the opinions of other researchers.
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