Reduction of leaf tip burns of Ornithogalum dubium by controlling the temperature during bulb storage and greenhouse forcing to produce quality plants

Q3 Agricultural and Biological Sciences

Advances in horticultural science Pub Date : 2022-01-14 DOI:10.36253/ahsc-11568

X. Wu, L. Wang, M. Roh

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引用次数: 0

Abstract

Production of quality potted Ornithogalum dubium Houtt. plants were investigated under multiple conditions: pre-planting treatment at 10, 16, and 22°C for 40 days from Sept. 21 (stage A; ST-A) during bulb storage and then bulbs were potted. After potting, post-planting treatment at 15/12, 18/15, and 21/18°C (day/night) during stage B for 35 days from Nov. 2 (stage B; ST-B), and at 15/12 and 21/18°C during stage C for 30 days from Dec. 7 (stage C; ST-C) during greenhouse forcing was applied. Leaf tissue analyses for macro- and micro-nutrients were performed to investigate the cause of leaf tip burn symptom (LTB). Three criteria for quality of the plants at flowering were established: (1) LTB occurs on less than 1.5 leaves per plant. (2) the number of days to flower is less than 115 days, the length of the third leaf counted from the crown (the junction of the shoot and roots) is shorter than 11.5 cm, and the width is narrower than 2.5 cm; the scape length is shorter than 15 cm, and there are more than 45 flowers. (3) the leaf spread and morphology (leaf spread) and the pattern of the scape curvature (scape growth) have a score of less than 1.5. The following conditions are optimal to produce quality plants based on these three criteria: (1) Pre-planting bulbs treatment was applied at 10 or 16°C during ST-A, and forcing was performed at 15/12°C during ST-B and 21/18°C during ST-C. These conditions accelerated flowering, produced straight scape growth and upward (erect) growing leaves, and yielded acceptable leaf length and width. (2) The incidence of LTB was minimal at 10°C or possibly 16°C during ST-A, and at 15/12°C in ST-B and at 21/18°C in ST-C during greenhouse forcing. Leaf tip burn symptom was observed in both young and old leaves and was caused by a high boron (B) concentration (218-230 ppm) and possibly a high zinc (Zn) concentration (155-159 ppm) in O. dubium. A low calcium (Ca) concentration was not the cause of LTB. Although LTB cannot be avoided, it can be minimized by temperature manipulation during pre- and post-planting phase to produce high quality potted plants.

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通过控制球茎贮藏温度和温室强制生产优质植株来减少鸟草叶尖烧伤

生产品质优良的鸟粪石罐。在多种条件下对植株进行了研究:从9月21日开始，在10、16和22°C下进行40天的种植前处理(阶段A;ST-A)，然后将球茎盆栽。盆栽后，从11月2日(B期)起，在B期15/12、18/15、21/18℃(昼/夜)进行种后处理，共35天;阶段C从12月7日起30天，温度分别为15/12和21/18℃(阶段C;ST-C)。通过对叶片组织进行宏量和微量元素分析，探讨叶尖灼烧症状(LTB)的原因。建立了花期植株质量的3个标准:(1)每株植株叶片上发生LTB少于1.5片;(2)开花天数小于115天，从冠部(茎与根交界处)算起的第三片叶子长度小于11.5厘米，宽度小于2.5厘米;花苞长度小于15厘米，花45朵以上。(3)叶展与形态(叶展)和景观曲率格局(景观生长)得分均小于1.5分。根据这三个标准，以下条件是生产优质植株的最佳条件:(1)在ST-A期间，种植前球茎处理在10或16°C进行，在ST-B期间在15/12°C和ST-C期间在21/18°C进行催育。这些条件加速了开花，产生了直立生长和向上(直立)生长的叶片，并产生了可接受的叶片长度和宽度。(2)温室强迫期间，在ST-A期10°C或16°C时，ST-B期15/12°C和ST-C期21/18°C时，LTB的发生率最小。在幼叶和老叶中都观察到叶尖灼烧症状，其原因可能是杜仲中硼(B)浓度高(218 ~ 230 ppm)，也可能是锌(Zn)浓度高(155 ~ 159 ppm)。低钙(Ca)浓度不是引起LTB的原因。虽然LTB无法避免，但可以通过在种植前和种植后阶段控制温度来减少LTB，以生产高质量的盆栽植物。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in horticultural science Agricultural and Biological Sciences-Horticulture

CiteScore

1.20

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： Advances in Horticultural Science aims to provide a forum for original investigations in horticulture, viticulture and oliviculture. The journal publishes fully refereed papers which cover applied and theoretical approaches to the most recent studies of all areas of horticulture - fruit growing, vegetable growing, viticulture, floriculture, medicinal plants, ornamental gardening, garden and landscape architecture, in temperate, subtropical and tropical regions. Papers on horticultural aspects of agronomic, breeding, biotechnology, entomology, irrigation and plant stress physiology, plant nutrition, plant protection, plant pathology, and pre and post harvest physiology, are also welcomed. The journal scope is the promotion of a sustainable increase of the quantity and quality of horticultural products and the transfer of the new knowledge in the field. Papers should report original research, should be methodologically sound and of relevance to the international scientific community. AHS publishes three types of manuscripts: Full-length - short note - review papers. Papers are published in English.