Yield characteristics of cherry tomato cultivated with and without shading screen at different irrigation levels

ABSTRACT The use of shading screen in vegetable crops sensitive to the radiation excess, associated with the effective water use via irrigation, allows for yield gains. This study aimed to evaluate the yield characteristics of cherry tomato cultivated with and without shading screen and different irrigation levels. A randomized block design was used, in a 4 x 2 factorial arrangement, with four irrigation levels (140 %, 160 %, 180 % and 200 % of the reference evapotranspiration - ETo) and two cherry tomato hybrids (Wanda and Dolcetto). The irrigation level corresponding to 200 % of the ETo provided the highest values for number of flowers and clusters formed, number of fruits per plant and fruit diameter. The Wanda hybrid was more fruitful, with a higher emission of clusters, while Dolcetto was more floriferous. The use of shade screen for cultivating cherry tomato provides an increase in the yield characteristics, if compared to the cultivation in open areas.摘要 针对过量辐射敏感的蔬菜作物施用遮阳网，并配合灌溉实现高效水分利用，可提升作物产量。本研究旨在评估不同灌溉梯度下，遮阳网栽培与露地栽培樱桃番茄的产量相关性状。本试验采用随机区组设计，设置4×2析因排列，包含4个灌溉梯度（分别为参考蒸发蒸腾量（reference evapotranspiration, ETo）的140%、160%、180%及200%）与2个樱桃番茄杂交品种（Wanda与Dolcetto）。当灌溉梯度为ETo的200%时，单株开花数、果穗数、单株结果数及果实直径均达到最高值。Wanda杂交品种结果能力更强，果穗抽生数更多；而Dolcetto品种开花量更高。与露地栽培相比，采用遮阳网栽培樱桃番茄可提升其产量相关性状表现。