Research on physiological characteristics and seed storage measures of Tarrietia javanica Blume in Central North region

Abstract

Tarrietia javanica Blume is a native, big-sized timber species, widely distributed in Central region of Vietnam. The research results show that the length of fruit without wing is 17.4 mm, the width is 13.1 mm; the length of wing in 66.6 mm, width of wing is 32.6 mm; total length of fruit with wing is 84 mm. The seed purity is 95.92%, number of fruits with wings is 1,011 -1,087 per kg, number of fruits without wings is about 1,396 - 1,424 per kg. The weight of 1.000 fruits with wings is about 989.2 - 919.8 g and without wings is about 702.3 - 716.2g. The moisture of seeds collected in Central north region on average is 13.1%. Germination rate of seeds is 82.3%. Germination time of seeds is 19 - 21 days. Seeds start germinating in 5 th day after sowing and getting the highest germination rate in 9 th day. Temperature greatly affects germination possibility of seeds. The highest germination rate occurs at temperature 27 - 29 o C, at lower temperature germination rate is decreased and the time that’s seeds start germinating will be longer. Storage of seeds can be done in cloth bags and put in the jar at room temperature, germination rate after 1 month storage is 60.67%, after 3 months remains 45.33%. It is recommended that storage of seeds of Tarrietia javanica can be applied by only 3 - 4 months because after this time germination rate shaply decrease