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Effect of leaf-area management on tomato plant growth in greenhouses
Horticulture, Environment, and Biotechnology ( IF 2.4 ) Pub Date : 2020-10-21 , DOI: 10.1007/s13580-020-00283-1
Won Jun Jo , Jong Hwa Shin

Photosynthesis in plants depends on various vegetative growth factors, such as leaf age, leaf area, and leaf number. Leaf area is related to canopy photosynthesis and production of crops. However, there are few studies that quantify the relationship between leaf area and crop growth according to various climatic conditions for tomato crops. Therefore, this study was conducted to quantify the relationship between leaf area and two cultivars of tomato plants in a greenhouse in the northeast Asian climate. In the experiment, tomato seedlings of ‘Super334’ and ‘Poongyoung’ were used. We ran the experiment from May 28 to September 16, 2019, with various leaf-area index (LAI) treatments. The greenhouse environments were managed to maintain a relative humidity of 38–90% and temperature of 15–35 °C. Irrigation was controlled based on accumulated radiation. We compared the tomato growth according to five leaf-area treatments: non-defoliation (control), LAI (2.5), LAI (3.0), LAI (3.5), and LAI (4.0). In terms of the vegetative growth of tomatoes, the smaller the LAI, the greater the plant height of the crops. In terms of reproductive growth, the number of flowers did not show significant differences between the control and the LAI treatments, but the number of fruits in the ‘Poongyoung’ cultivar seemed to increase with the higher LAI treatment. In terms of fruit quality, although fruit weight, sugar content, and acidity did not show any trends between the treatments, firmness was reduced below 3.0 LAI treatments. Given this experiment, we think that appropriate leaf-area management may be effective for increasing productivity in greenhouse tomato cultivation and that the data on the relationship between leaf area and plant growth of the various tomato cultivars should be further increased by continuous research.

中文翻译:

叶面积管理对温室番茄植株生长的影响

植物的光合作用取决于各种营养生长因素,例如叶龄、叶面积和叶数。叶面积与冠层光合作用和作物产量有关。然而,很少有研究根据番茄作物的各种气候条件来量化叶面积与作物生长之间的关系。因此,本研究旨在量化东北亚气候下温室中番茄植株的两个栽培品种与叶面积之间的关系。在实验中,使用了'Super334'和'Poongyoung'的番茄幼苗。我们于 2019 年 5 月 28 日至 9 月 16 日进行了实验,使用了各种叶面积指数 (LAI) 处理。管理温室环境以保持 38-90% 的相对湿度和 15-35°C 的温度。根据累积辐射控制灌溉。我们根据五种叶面积处理比较了番茄的生长情况:不落叶(对照)、LAI(2.5)、LAI(3.0)、LAI(3.5)和 LAI(4.0)。在番茄营养生长方面,LAI越小,作物株高越大。在生殖生长方面,对照和 LAI 处理之间的花数没有表现出显着差异,但 'Poongyoung' 品种的果实数量似乎随着 LAI 处理的增加而增加。在果实品质方面,尽管果实重量、糖含量和酸度在处理之间没有表现出任何趋势,但在 3.0 LAI 处理以下时硬度降低。鉴于这个实验,
更新日期:2020-10-21
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