Abstract
ABSTRACT Sugarcane has a great economic interest in Brazil, so it needs technologies to increase its yield strength, especially for seedling production. This study aimed to ascertain the influence of shading nets on early growth and development of pre-sprouted sugarcane seedlings. An experiment was conducted in a protected environment, in the Rural Federal University of Pernambuco (UFRPE), in Recife-PE, Brazil. The protected environments were covered with anti-UV low-density polyethylene plastic plus: Solpack® red ultranet net, Solpack® white net, Solpack® freshnet net, and without shade net, and five replications each. The experiment was carried out in a completely randomized design, and multivariate principal component analysis (PCA) was used to verify associations among cultivation modules, micrometeorological factors, and seedling growth parameters. Anti-UV low-density polyethylene + shade net improved seedling growth and development up to 27 days after planting. Higher substrate temperatures benefited early growth of seedlings. After 27 days of planting, sugarcane seedlings required higher air temperatures, as well as increased global and photosynthetically active solar radiation.
Highlights
Brazil is the world's largest sugarcane producer and export leader, responsible for over 50% of its derivatives that are traded around the world, mainly sugar and ethanol
This study aimed to investigate the influence of shade nets on early growth and development of pre-sprouted sugarcane seedlings
According to the data covariance matrix, the first and second principal components (PCs) explained above 67.5% of the total variation in the four studied periods. This implies that data variability and associations among parameters can be described in only two main axes
Summary
Brazil is the world's largest sugarcane producer and export leader, responsible for over 50% of its derivatives that are traded around the world, mainly sugar and ethanol. The search for new cultivation technologies has increased to provide greater profitability and production quality (Nascimento et al, 2015). Pre-sprouted seedling (PSS) production is an alternative to conventional planting, which leads to an excessive number of stems and spread of diseases. PSS is a technology that allows greater control of seedling quality, vigor, and soundness (Xavier et al, 2016). It is of crucial importance to know the practices used from harvesting and propagative material storage to field transplanting of seedlings. Plants require certain shade conditions during the initial period of production to favor their development (Lee et al, 2007)
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