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University of Agricultural Sciences, Raichur (2012)

SEED TECHNOLOGICAL INVESTIGATIONS ON DROUGHT TOLERANT PRE RELEASED MAIZE HYBRID (Zea mays L.)

VENKATESH, B.

Titre : SEED TECHNOLOGICAL INVESTIGATIONS ON DROUGHT TOLERANT PRE RELEASED MAIZE HYBRID (Zea mays L.)

Auteur : VENKATESH, B.

Université de soutenance : University of Agricultural Sciences, Raichur

Grade : Master of Science (MS) 2012

Résumé
A field experiment was conducted at the College of Agriculture, Bheemarayanagudi, University of Agricultural Sciences, Raichur, on deep black loamy soil during rabi 2011-12 under drought condition and the laboratory experiment was carried out at the department of Seed Science and Technology, College of Agriculture, Raichur, University of Agricultural Science, Raichur, to study the performance of maize inbreds NEI 92202B (Female) and HS-4 (Male) with three different planting ratios and three different planting geometry. In the present investigation on maize hybrids with three different planting ratios like 3:1, 4:1 and 5:1 and three different planting geometry viz., 60 cm x 20 cm, 75 cm x 20 cm and 90 cm x 20 cm. The experiment was laid out in a two factorial randomized completely block design with 9 treatments replicated thrice. Among the different planting ratio and planting geometry, higher hybrid seed yield (54.07 q/ ha) was recorded in 5:1planting ratio with combination of 60 cm x 20 cm planting geometry and other yield contributing parameters viz., cob weight (168.67 g), number of seeds per row (43.67), number of seed rows per cob (15.00) and number of seeds per cob (654) but highest cob length (17.67 cm) was recorded in 4:1 planting ratio with combination of 90 cm x 20 cm spacing and similarly thousand seed weight (223 g) and seed recovery percent (78.99) was recorded maximum in planting ratio of 3:1 with the combination of 90 cm x 20 cm spacing. Whereas the seed quality parameters were non-significant. However, among the different treatments numerically highest root length (22.67 cm) and seedling vigour index (3200) were recorded in planting ratio of 4:1 with the combination of 75 cm x 20 cm of planting geometry. The economic analysis indicated that the higher gross return (432560.00), net return (398739.00) and B : C ratio (11.78) was recorded in 5:1 planting ratio with combination of 60 cm x 20 cm.

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