Varietal Differences in Underground Shoot Branching Characteristics and their Relation to Harvest Characteristics in Asparagus Crowns

IF 0.9 4区 农林科学 Q4 HORTICULTURE Horticulture Journal Pub Date : 2023-12-20 DOI:10.2503/hortj.qh-106
Minori Hikawa-Endo, Takao Ikeuchi, Shuji Kozai, Tomoya Nakamura, Masanori Yamaji, Ryosuke Yamanaka, Hisashi Yoshikoshi, Hiroki Kawashima
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Abstract

In general, either high or low branching may contribute to the yield potential of a cultivated crop. In this study, we evaluated the varietal differences in branching characteristics in asparagus crowns and examined the relationship between branching types and harvest characteristics among six varieties tested by careful observation. ‘UC 157’ developed numerous tillers and shoot apical meristems 6 months after sowing; thus, it was considered to be a high-branching type variety. In contrast, ‘All-male Gulliver’ and ‘Ryuryoku’ developed few tillers or shoot apical meristems and, were therefore considered to be low-branching type varieties. The final order of sympodial shoots and composition of sympodial shoots by order were similar between the varieties. ‘UC 157’ had fewer scale leaves attached to the underground shoots than other varieties, which may have been advantageous for developing underground shoots more rapidly. The total spear yield of ‘UC 157’ was high, but the marketable spear yield was similar to that of other varieties owing to the large number of thin spears. Although further studies are needed to determine whether high-branching or low-branching type asparagus varieties are more high-yielding, we determined that high-branching type varieties have lower labor productivity under unimproved growing conditions such as non-sparsely planted growing conditions.

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芦笋冠地下嫩枝分枝特性的品种差异及其与收获特性的关系
一般来说,高分枝或低分枝都有助于提高栽培作物的产量潜力。在这项研究中,我们评估了芦笋树冠分枝特性的品种差异,并通过仔细观察,研究了六个受试品种的分枝类型与收获特性之间的关系。UC 157 "在播种 6 个月后出现大量分蘖和芽顶端分生组织,因此被认为是高分枝型品种。相比之下,'全雄格列佛'和'Ryuryoku'的分蘖或芽顶端分生组织很少,因此被认为是低分枝型品种。各品种的合生枝最终顺序和合生枝各顺序的组成相似。与其他品种相比,'UC 157'的地下芽上附着的鳞片叶较少,这可能有利于更快地发育地下芽。UC 157 "的长矛总产量很高,但由于细长矛较多,其可销售的长矛产量与其他品种相似。虽然需要进一步研究才能确定是高分枝型芦笋品种更高产还是低分枝型芦笋品种更高产,但我们确定高分枝型品种在非改善的种植条件下(如非稀疏种植的种植条件)劳动生产率较低。
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来源期刊
Horticulture Journal
Horticulture Journal HORTICULTURE-
CiteScore
2.20
自引率
8.30%
发文量
61
期刊介绍: The Horticulture Journal (Hort. J.), which has been renamed from the Journal of the Japanese Society for Horticultural Science (JJSHS) since 2015, has been published with the primary objective of enhancing access to research information offered by the Japanese Society for Horticultural Science, which was founded for the purpose of advancing research and technology related to the production, distribution, and processing of horticultural crops. Since the first issue of JJSHS in 1925, Hort. J./JJSHS has been central to the publication of study results from researchers of an extensive range of horticultural crops, including fruit trees, vegetables, and ornamental plants. The journal is highly regarded overseas as well, and is ranked equally with journals of European and American horticultural societies.
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