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首页> 外文期刊>The Journal of Horticultural Science & Biotechnology >Comparison of sampling strategies for determining fruit mineral concentrations in 'Hass' avocado (Persea americana Mill.).
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Comparison of sampling strategies for determining fruit mineral concentrations in 'Hass' avocado (Persea americana Mill.).

机译：确定“哈斯”鳄梨（Persea americana Mill。）中水果矿物质浓度的采样策略比较。

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摘要

Spatial and temporal variation in mineral and dry matter (DM: % dry weight) concentrations were examined in 'Hass' avocado (Persea americana Mill.) fruit to identify sampling strategies for examining fruit mineral, DM and fruit quality relationships. Calcium (Ca), magnesium (Mg), potassium (K), and DM concentrations were compared from different parts of the same fruit, from fruit harvested from different shoot types and locations within the same tree, and at different stages during the growing season, from fruit set to commercial harvest. The main source of variation within fruit was longitudinal, with K and DM concentrations being higher at the distal end of the fruit. Sampling methods based on equatorial plugs of tissue provided the best estimates of whole fruit values for DM and mineral nutrients. While there was much variability in the internal distribution of minerals within the fruit, the distribution was the same for fruit from both the northern and southern aspects of the tree. During the first 4 months after fruit set, fruit from determinate floral shoots (i.e., with a flower in the terminal position) had higher Ca and Mg concentrations than fruit from indeterminate shoots (i.e., with a shoot in the terminal position). After this time, fruit Mg and Ca concentrations were higher on indeterminate shoots, possibly because of changes in sink-strength and increased transpirational flow associated with new leaf growth on indeterminate shoots. The data showed that shoot type was a source of fruit-to-fruit variability in an avocado crop, and that care should be taken in sampling fruit tissues for nutrient analyses..
机译：在'Hass'鳄梨（Persea americana Mill。）水果中检测了矿物质和干物质（DM：干重百分比）浓度的时空变化，以确定用于检验水果矿物质，DM和水果质量关系的采样策略。比较了同一果实的不同部位，同一棵树上不同枝类型和位置的果实以及生长季节中不同阶段的钙，钙，镁和钾的浓度。 ，从水果种植到商业收获。果实内变异的主要来源是纵向的，而果实远端的K和DM浓度较高。基于赤道组织的采样方法可以对DM和矿物质营养素的整个水果值进行最佳估计。虽然水果内部矿物质的内部分布存在很大差异，但从树的北部和南部来看，水果的分布是相同的。在坐果后的前4个月中，来自确定的花梢（即末端有花）的果实中的Ca和Mg浓度高于不确定的芽（即末端处有枝）的果实中的Ca和Mg浓度。此后，不确定幼枝上的果实Mg和Ca浓度较高，这可能是由于不定幼枝上的新叶片生长而导致的库强度变化和蒸腾流增加。数据表明，芽的类型是鳄梨作物果实间差异的源头，应谨慎取样水果组织进行营养分析。

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