Effect of spacing and fertilizer on growth, yield and quality of Bt cotton (Gossypium hirsutum L.) genotypes
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Date
2009
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CCSHAU
Abstract
A study entitled, “Effect of spacing and fertilizer on growth, yield, and quality
of Bt cotton (Gossypium hirsutum L.) genotypes”, was conducted at Research Farm,
Department of Agronomy, CCS, Haryana Agricultural University, Hisar during Kharif
2006. The soil of experimental field was sandy loam in texture and slightly alkaline
in pH. Soil tested low in organic carbon and available nitrogen and high in available
phosphorus and potassium. The experimented was conducted in split plot design
with three replications. The combination of three spacings (67.5 x 60 cm, 100 x 45
cm and 100 x 60 cm), three fertilize levels viz., F1 112.5: 45: 45 NPK Kg/ha), F2
xix
150.0: 50: 50 NPK Kg/ha), F3 187.5: 75: 75 NPK Kg/ha), were kept in main plots
while three hybrids viz. JKCH 1050 Bt, JKCH 1945 Bt and HHH 223 non Bt were
kept in subplots. Maximum plant height was recorded at wider spacing of 100x 45
cm followed plant spacing had a significant effect on dry matter accumulation.
Maximum sympodial branches / plant were recorded in wider spacing (100 x 60 cm)
which were significantly higher than closer spacing (100 x 45 cm and 67.5 x 60 cm).
Seed cotton yield (Kg/ha) was highest in wider spacing (100 x 45 cm) that was
higher than 67.5 x 60 cm and 100 x 60 cm respectively. Maximum oil content (%)
and protein content (%) recorded in cotton seed in wider spacing (100 x 60 cm)
which were significantly higher than closer spacings (100 x 45 cm and 67.5 x 60
cm). Plant spacing had a significant effect on N and K uptake but non-significant
effect on phosphorus uptake by the crop. Total NPK uptake cotton seed was highest
in S2 with a significant difference with S1.Nitrogen uptake by crop was
non-significant. Total uptake of NPK by cotton crop under F1and F3 fertilizer doses
did not differ significantly. Maximum potassium uptake was recorded in HHH 223
non-Bt than JKCH 1050 Bt followed by and JKCH 1945 Bt. The genotypes did not
differ in N, P and K uptake by cotton seed as well as total uptake by crop. Spacing
67.5 x 60 cm and 100 x 45 cm resulted in higher total cost of cultivation, gross
returns and net returns than 100 x 60 cm with 100% and 125% of recommended
dose of fertilizers. Benefit : cost ratio was significantly better in spacing 67.5 x 60 cm
and 100 x 45 cm with 75% and 100% of recommended dose of fertilizers.
Description
Keywords
Biological phenomena, Livestock, Research methods, Diseases, Genes, Nucleus, Pcr, Concentrates, Bacteria, Cell culture