Univariate and multivariate analysis on processing tomato quality under different mulches

Abstract

The use of eco-friendly mulch materials as alternatives to the standard polyethylene (PE) has become increasingly prevalent worldwide. Consequently, a comparison of mulch materials from different origins is necessary to evaluate their feasibility. Several researchers have compared the effects of mulch materials on each crop variable through univariate analysis (ANOVA).However, it is important to focus on the effect of these materials on fruit quality, because this factor decisively infl uences the acceptance of the fi nal product by consumers and the industrial sector. This study aimed to analyze the information supplied by a randomized complete block experiment combined over two seasons, a principal component analysis (PCA) and a cluster analysis (CA) when studying the effects of mulch materials on the quality of processing tomato (Lycopersicon esculentum Mill.). The study focused on the variability in the quality measurements and on the determination of mulch materials with a similar response to them. A comparison of the results from both types of analysis yielded complementary information. ANOVA showed the similarity of certain materials. However, considering the totality of the variables analyzed, the fi nal interpretation was slightly complicated. PCA indicated that the juice color, the fruit fi rmness and the soluble solid content were the most infl uential factors in the total variability of a set of 12 juice and fruit variables, and CA allowed us to establish four categories of treatment: plastics (polyethylene -PE, oxo-and biodegradable materials), papers, manual weeding and barley (Hordeum vulgare L.) straw. Oxobiodegradable and PE were most closely related based on CA.

Sweet potato (Ipomoea batatas L.) growing in conditions of southern Slovak republic

“…Total carotenoid content in orange-fleshed tubers was more than three-fold higher compared to sweet potatoes with yellow, purple and white flesh color. The strong interaction between flesh color and total carotenoid content in sweet potato was also presented in study of Ellong, Billard and Adenet ( 2014), Grace et al (2014) and Hussein et al (2014). Within trial in China, Tang, Cai and Xu (2015) found higer total carotenoid in sweet potato tubers compared to results showed in our trial.…”

“…The highest vitamin C content was determined in purple cultivars (727.1 mg.kg -1 ), followed by cultivars with white (672.2 mg.kg -1 ) and yellow flesh color (204.7-254.4 mg.kg -1 ). According to study of Ellong, Billard and Adenet (2014), determined vitamin C content in yellow or creme sweet potatoes varied from 177.5 mg.kg -1 to 290.5 mg.kg -1 f. w. It meant higher values of vitamin C content in comparison with our trial. Yildirim, Tokuşoğlu and Öztürk (2011) also stated that cultivar and flesh color had an significant impact on the vitamin C content in sweet potato tubers.…”

Response of healthy local tomato (Solanum lycopersicum L.) populations to grafting in organic farming

“…The bigger fruits obtained in grafted Mor-62, together with an intensification of the red colour due to the high lycopene content 39 , might have led to its good visual acceptance. In this context, Di Gioia et al .…”

Análisis Multivariado y Aprendizaje Automático en la evaluación y pronóstico de los perfiles financieros en el sector de Telecomunicaciones en Colombia

“…Lo anterior es el sustento para el proceso de pronóstico de las empresas en el objeto de estudio de esta investigación Como criterios de validez se utilizará la matriz de confusión, el análisis de sensibilidad y especificidad Así mismo, el Análisis Multivariado ha mostrado su importancia en el análisis de problemas en los que intervienen un gran número de variables [13]- [15], representa un conjunto de herramientas estadísticas y matemáticas utilizadas para analizar e interpretar los datos asociadas a múltiples variables [16]. Tiene como finalidad analizar de manera simultánea un conjunto de datos multivariantes medidos para cada individuo u objeto estudiado, lo que permite una mejor comprensión del fenómeno o proceso objeto de estudio [16].…”