Performance of different planting materials of tannia (xanthosoma sagittifolium(L.) schott) under shade
By: Nayana V R.
Contributor(s): George Thomas, C (Guide).
Material type:
BookPublisher: Vellanikkara, Thrissur Department of Agronomy, College of Horticulture 2018Description: 96p.Subject(s): AgronomyDDC classification: 630 Online resources: Click here to access online Dissertation note: MSc Abstract: An experiment was conducted for studying the response of different shade
levels and planting materials on tannia (Xanthosoma sagittifolium (L.) Schott), an aroid
tuber crop. The experiment was done in split plot design with the shade levels of 25
and 50 per cent and open as main plots and top of corm, cormels, and split corm as
planting materials in sub plots. Shading and planting materials affected both growth
and yield of tannia.
Shade caused taller plants with longer petioles. Leaf numbers, lamina area, and
LAI were higher with 50 per cent shade. Open condition decreased leaf life span but
increased lamina thickness. Corm yield was higher in 50 per cent shade (6.80 t/ha).
Higher number of cormels (10.29) were also obtained from plots with 50 per cent
shade. Both 25 and 50 per cent shade recorded highest cormel yield (13.47 t/ha and
12.66 t/ha, respectively). Shoot: storage organ ratio (0.11) was significantly low in
open plots, while low corm: cormel ratio (0.48) was noted in 50 per cent shade.
Among planting materials, top of corm has taken less days for emergence (15
days) followed by cormels (21days). Top of corm was superior in terms of leaf
numbers, leaf area, and LAI. Yield characters including number of cormels (10.63),
corm yield (8.13 t/ha), and cormel yield (13.59 t/ha) were also high in top of corm
planting.
Crude protein content was low in cormels compared to corms. However, starch
content was much higher in cormels. Shade increased starch content of cormels, but
decreased corm protein content. Higher crude protein content of corm (8.14 %) and
cormels (4.38 %) was observed with split corm planting, but higher starch content of
corms (56.98 %) and cormels (65.07 %) were noted with top of corm. Oxalate content
was unaffected because of treatments but higher in corms than cormels.
Higher benefit - cost ratio of 4.86 was observed with planting of top of corm
under 50 per cent shade followed by it under 25 per cent shade (4.45). It is concluded
that tannia is a shade loving crop, which can be cultivated under 25 to 50 per cent shade
using top of corm as planting material. In the absence of enough planting materials,
split corm is an ideal substitute.
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KAU Central Library, Thrissur Theses | Reference Book | 630 NAY/PE (Browse shelf) | Not For Loan | 174436 |
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MSc
An experiment was conducted for studying the response of different shade
levels and planting materials on tannia (Xanthosoma sagittifolium (L.) Schott), an aroid
tuber crop. The experiment was done in split plot design with the shade levels of 25
and 50 per cent and open as main plots and top of corm, cormels, and split corm as
planting materials in sub plots. Shading and planting materials affected both growth
and yield of tannia.
Shade caused taller plants with longer petioles. Leaf numbers, lamina area, and
LAI were higher with 50 per cent shade. Open condition decreased leaf life span but
increased lamina thickness. Corm yield was higher in 50 per cent shade (6.80 t/ha).
Higher number of cormels (10.29) were also obtained from plots with 50 per cent
shade. Both 25 and 50 per cent shade recorded highest cormel yield (13.47 t/ha and
12.66 t/ha, respectively). Shoot: storage organ ratio (0.11) was significantly low in
open plots, while low corm: cormel ratio (0.48) was noted in 50 per cent shade.
Among planting materials, top of corm has taken less days for emergence (15
days) followed by cormels (21days). Top of corm was superior in terms of leaf
numbers, leaf area, and LAI. Yield characters including number of cormels (10.63),
corm yield (8.13 t/ha), and cormel yield (13.59 t/ha) were also high in top of corm
planting.
Crude protein content was low in cormels compared to corms. However, starch
content was much higher in cormels. Shade increased starch content of cormels, but
decreased corm protein content. Higher crude protein content of corm (8.14 %) and
cormels (4.38 %) was observed with split corm planting, but higher starch content of
corms (56.98 %) and cormels (65.07 %) were noted with top of corm. Oxalate content
was unaffected because of treatments but higher in corms than cormels.
Higher benefit - cost ratio of 4.86 was observed with planting of top of corm
under 50 per cent shade followed by it under 25 per cent shade (4.45). It is concluded
that tannia is a shade loving crop, which can be cultivated under 25 to 50 per cent shade
using top of corm as planting material. In the absence of enough planting materials,
split corm is an ideal substitute.
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