Abstract
Clitoria fairchildiana R. A. Howard, belonging to the family Fabaceae is a fast-growing ornamental tree, with potential for use in reforestation for heterogeneous vegetation reconstruction and recovery of degraded areas. Storage is aid in quality programs, which allows the preservation of the quality of seeds, however, the water content of the same is a crucial factor in its preservation, because it is high may cause deterioration and death of seeds stored. In this way the objective to evaluate the germination and vigor of seeds of C. fairchildiana stored with different levels of water. That’s way was an experiment in completely randomized design in a factorial 5 x 7 (water levels and periods of storage). Before storage for 20, 40, 60, 80, 100 and 120 days, the seeds were subjected to drying in an oven at 40 °C for 0, 6, 12, 18 and 12:0 am, to obtain the following water levels: TA 1 = 19.05, TA 2 = 13.60, TA 3 = 11.99%, TA 4 = 10.51% and TA 5 = 8.70%, respectively. After each interval of storing seeds were subjected to the following evaluations: determination of the moisture content, germination and vigor tests (emergency, first count of germination and emergence and germination speed index and emergence, seedling dry mass and length). The reduction of water content of seed C. fairchildiana to 10.5 and 8.7% (TA 4 TA 5 and, respectively) resulted in greater preservation during storage, giving Orthodox behavior for stand drying until it reaches the water content of around 8%.
Highlights
The same is a technique that can be used to preserve the quality of seed and make them available in different times of the year, some factors must be observed, such as the water content of the seeds, used packaging and environmental features such as temperature and relative humidity, in order to ensure the maintenance of the germination and vigor of seeds during this process (CARVALHO; NAKAGAWA, 2012)
After each drying period of seed samples were removed from the oven, which were placed in Kraft paper bag and stored in the fridge (6 ± 2° C and 38% ± 3 UR) for up to 120 days, with evaluations in the intervals of 0, 20, 40, 60, 80, 100 and 120 days, and after each period seeds were subjected to the following evaluations: Determination of water content Content of the seeds was determined before and after each period of drying and storage, in four sub-amostras of 10 seeds for each treatment, using the method of oven at 105 ± 3° C for 12:0 am, following the recommendations of Brasil (2009), with the results expressed in percentage
The data from the first count of germination (Figure 2C) if found that the vigor of seeds of C. fairchildiana with 19.05% water content (TA1) decreased throughout the store, demonstrating behavior similar to that observed in germinating end, for the water content of 13.60% (TA2) to 25 days maximum germination obtained was 62%, whereas with 11.99% (TA3), the highest percentage of germination in the first count (70%) was observed for 45 days of storage
Summary
A. Howard, better known as sombreiro is a native of the Amazon forest, belonging to the family Fabaceae, whose wood is used in construction as internal partitions, ceilings, manufacturing of toys and boxing; its growth is fast, so is widely used in afforestation, reforestation programs permanent preservation and heterogeneous the fruits of that species is a pod that must be harvested directly in the tree at the beginning of the natural sun-dried and dehiscence to complete the opening and release of seed (LORENZI, 2009). For a variety of native forest species have irregular seed production, being abundant in given year and insufficient in others, so the storage becomes necessary to ensure the annual demand of seeds for the production of seedlings that may be employed in reforestation programs, as well as, allow the stock for years in which seed production is low (CARNEIRO; AGUIAR, 1993). The same is a technique that can be used to preserve the quality of seed and make them available in different times of the year, some factors must be observed, such as the water content of the seeds, used packaging and environmental features such as temperature and relative humidity, in order to ensure the maintenance of the germination and vigor of seeds during this process (CARVALHO; NAKAGAWA, 2012)
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