EFFECT OF PLANT POPULATION, NUTRITION, PINCHING AND GROWTH REGULATORS ON PLANT GROWTH, SEED YIELD AND QUALITY OF AFRICAN MARIGOLD (Tagetes erecta L.)
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Date
2007-09-01
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University of Agricultural Sciences GKVK, Banglore
Abstract
Two field experiments were conducted to study the influence of plant
population, nutrition, pinching and growth regulators on plant growth,
seed yield and quality of African marigold at Water and Land Use
Management Institute (WALMl) Farm, Dharwad during 2004-05 and
Laboratory studies were carried out at National Seed Project, University of
Agricultural Sciences, Dharwad.
The application of vermicompost as 50% RDN along with 50% RDF
recorded significantly higher plant height (100.32 cm), number of primary
branches per plant (13.13), number of flowers per plant (66.19), seed yield
per plant (18.65 g) and seed yield per ha (499.05 kg) and also recorded
higher 1000 seed weight (3.36 g), germination percentage (89.10), field
emergence percentage (81.48), root length (6.22 cm), shoot length (5.55
cm), seedling dry weight (11.53 mg) and vigour index (1047) compared to
application of recommended dose of fertilizer (RDF). While wider spacing of
60 X 60 cm recorded more number of primary branches per plant (11.59),
number of flowers per plant (59.65), seed yield per plant (15.37 g)
compared to closer spacing of 60 x 40 cm. However seed yield per ha
(453.47 kg) was significantly higher at closer spacing of 60 x 40 cm.
Significantly higher plant height (95.93 cm) was recorded in
unpinched plants, while pinched plants recorded significantly higher
number of primary branches per plant (12.00), number of flowers per plant
(61.88), seed yield per plant (18.22 g) and seed yield per ha (473.71 kg).
Among the growth regulator, GA3 200 ppm spray recorded
significantly higher plant height (101.21 cm), number of primary branches
per plant (14.47), number of flowers per plants (68.66), seed yield per plant
(20.63 g) and seed yield per ha (531.54 kg) and also recorded significantly
higher 1000 seed weight (3.34 g), germination percentage (90.13), field
emergence percentage (77.10), root length (6.34 cm), shoot length (5.41
cm), seedling dry weight (11.44 mg) and vigour index (1059) compared to
ethrel 750 ppm.
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