Drought resistance of sugar-cane crop for different levels of water availability in the soil

Abstract

Soil water availability is the main cause of reduced productivity, and the early development period most sensitive to water deficit. This study aimed to evaluate the drought resistance of the varieties of sugar-cane RB867515 and SP81-3250 during the early development using different levels of water deficit on four soil depths. The experiment was conducted at the Department of Biosystems at Escola Superior de Agricultura "Luiz de Queiroz" (ESALQ/USP) in a greenhouse in soil classified as Oxisol, sandy loam texture (Series "Sertãozinho"). Once exhausted the level of available water in the soil, the dry strength of the studied strains are relatively low. Water balance with values less than -13 mm cause a significant decrease in the final population of plants, regardless of the variety, and values below -35 mm, leads to the death of all plants.KEYWORDS: irrigation, plant population, Saccharum spp., drought tolerance. PALAVRAS-CHAVE: irrigação, população de plantas, Saccharum spp., tolerância à seca. RESISTÊNCIA

Silicon fertilization reduces the deleterious effects of water deficit in sugarcane

“…Irrigation was carried out based on the soil moisture data obtained from the readings of puncture tensiometers installed at two depths (0 to 11.5 cm and 11.5 to 23 cm) in each pot, according to Barbosa et al, (2014).…”

Effect of Irrigation Regime and Nitrogen Fertilization Levels on Sugarcane Yield and Its Components

“…The yield and yield components were highest with irrigation at 1-week interval. Barbosa et al , (2014) Water balance with values less than -13 mm cause a significant decrease in the final population of plants, regardless of the variety, and values below -35 mm, leads to the death of all plants.…”

Crescimento, desenvolvimento e consumo hídrico de cana-de-açúcar sob dois sistemas de manejo da palha

“…Segundo Barbosa et al (2014), uma vez que o nível de água disponível no solo diminui, a tolerância à seca das variedades da cana-de-açúcar é relativamente baixa. Os mecanismos eficazes de resistência à seca para a cultura de cana de açúcar devem estar relacionados com a capacidade das plantas em evitar a perda excessiva de água para a atmosfera, dentre os mecanismos os autores destacam a regulação estomática, resistência do fluxo de seiva no xilema, concentração de sais nas raízes e uma exploração mais eficaz da água disponível no perfil do solo, aumentando a profundidade do sistema radicular.…”