Open AccessSubstrate moisture and temperature in Cajanus cajan (L.) Millspaugh germination
Author(s) -
Edlânia Maria de Souza,
Edna Ursulino Alves,
Maria Lúcia Maurício da Silva,
Luciana Rodrigues de Araújo,
Maria das Mercês Serafim dos Santos Neta
Publication year - 2017
Publication title -
semina. ciências agrárias
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.268
H-Index - 25
eISSN - 1679-0359
pISSN - 1676-546X
DOI - 10.5433/1679-0359.2017v38n4suplp2375
Subject(s) - germination , seedling , cajanus , water content , substrate (aquarium) , moisture , dry weight , horticulture , botany , agronomy , mathematics , chemistry , biology , ecology , geotechnical engineering , organic chemistry , engineering
Cajanus cajan (L.) Millspaugh, a member of the Fabaceae, is commonly known as feijão-guandu. It was introduced into Brazil because it readily adapts to local climate conditions and tolerates a wide range of water and mineral nutrient levels. The objective of this study was to determine the substrate temperatures and water volumes that are conducive to feijão-guandu seed germination and seedling vigor. The experiment was conducted at the Laboratory of Seed Analysis of the Centre of Agricultural Sciences, Federal University of Paraíba, Areia, PB, Brazil. Seed germination was tested using paper towel rolls moistened with volumes of water equivalent to 2, 2.5, 3, 3.5, and 4 times the dry mass of the substrate. Variable temperatures in the range of 20 °C to 30 °C and constant temperatures of 25 °C, 30 °C, and 35 °C were used. The experimental design was completely randomized. The variables analyzed were water content, percent germination, first germination count, germination rate index, and seedling root and shoot lengths and dry weights. Increasing the volume of water used to moisten the substrate hindered feijão-guandu germination at all temperatures. It was determined that moistening the substrate with water volumes equivalent to 2.8 and 3.5 times the substrate dry weight at 30 °C and 35 °C, respectively, were the ideal conditions for evaluating feijão-guandu seed germination and seedling vigor.