Effect of peatmoss and sand mixing ratio on the acclimatization of Smooth cayenne pineapple (Ananas comosus (L) Merr.).

Abstract

The effect of peat moss and sand each alone and in 8 different mixing ratios (5 part of peatmoss mix with 1, 2, 3, 4 and 5 part of sand and 1 part of peatmoss mix with 1, 2, 3, 4, and 5 parts of sand) on the survival and growth of Smooth cayenne pineapple plantlets during acclimatization stage were compared. The highest plantlets survival (100 %) obtained in pots filled with sand alone (0 : 1) and mix of 1 part of peat moss and 3 parts of sand (1: 3) while the lowest survival (67 %) obtained on pots filled with 5 parts of peat moss and 3 parts of sand (5: 3). The tallest (120 mm) and heaviest (2.94 g) plantlets, on the other hand, obtained in pots filled with mix of 1 part peat moss and 4 parts sand (1: 4) and equal parts of sand and peat moss (1: 1) respectively while mixing of 5 parts of peat moss with 4 parts of sand (5: 4) resulted in the shortest (103 mm) and lightest plantlets (2.42 g). The difference of 33 % in plantlets survival among the various mixing ratio indicated that proper selection of substrate during acclimatization stage is very crucial for commerciality of any micropropagation system

In Vitro Micrografting of Red Globe (Vitis Vinifera L)

“…Furthermore, Freedom was obviously had the highest number of roots and longer than in SO4 rootstock. (21). The remarkable growth and roots of the survival plantlets could be explained by the successful acclimatization and these results is in agreement with those obtained by (37) who reported that rooting of grafted plants may happen when the roots first initiated in vitro and after that grown outdoor on root growing media and those recorded by (46,29) who stated that the more successful transplantation of plantlets, the high growth can be achieved.…”

“…Hence mixing sand, peatmoss, and perlite in equal volumes might have helped in giving a better grip for the roots, ample aeration, and sufficient organic matter. Similar results have also been obtained by (48,41,21). The results presented in Figure 21 show that Freedom rootstock is considered more effective for Red globe micrografts than SO4, as it achieved the highest survival rate (100%) compared to those on SO4 (80%).…”

“…Pt: peatmoss, Sa: sand, Per: perlite The physical and chemical properties of the soil media have obviously different impact on the plantlet survival. Therefore, different workers have suggested different media such as soil-vermiculite mixture (19), soil (33), and sand-peatmoss (21). Among various potting mixtures tried, the mixture containing sand+peatmoss+perlite (1:1:1) was found to be the most suitable.…”