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OPTIMIZATION OF SOWING WINDOW AND CROP DENSITY IN MESTA FOR SEED PRODUCTION

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Title OPTIMIZATION OF SOWING WINDOW AND CROP DENSITY IN MESTA FOR SEED PRODUCTION
 
Creator PUSHPA, P
 
Contributor RAMANA, A.V.
 
Subject OPTIMIZATION, SOWING WINDOW, CROP DENSITY, MESTA, SEED PRODUCTION
 
Description A field trial entitled ?Optimization of sowing window and crop density in mesta for seed production? was carried out on sandy soil of Agricultural College Farm, Bapatla during kharif, 2013. The experiment was laid out in a split plot design and replicated thrice. The treatments consisted of four dates of sowings (D1- 3rd week of July, D2- 1st week of August, D3- 3rd week of August and D4- 1st week of September) allotted to main plots and four spacings (S1- 30 cm ? 10 cm, S2- 20 cm ? 10 cm, S3- 15 cm ? 15 cm and S4- 15 cm ? 10 cm) allotted to sub plots.
The results of the trial revealed that growth parameters, yield attributes and seed yield of mesta crop were significantly influenced by sowing window, spacing and their interaction.
Growth parameters viz., plant height, dry matter accumulation, number of branches per plant and crop growth rate were found significantly higher with the earliest sowing window i.e. 3rd week of July (D1), which was closely followed by 1st week of August (D2) in case of plant height and number of branches per plant. Whereas, relative growth rate of the crop was found higher with 1st week of September (D4) sowing. Mesta sown during 3rd week of July took significantly higher number of days to attain 50% flowering over other sowing windows.
Significantly higher number of capsules per plant and 1000 seed weight was observed with early sowing of mesta during 3rd week of July (D1) which were however, comparable with the immediate delayed sowing during 1st week of August (D2). Sowing of roselle during the 1st week of September (D4) was found to produce maximum number of seeds per capsule which was significantly higher over rest of the sowing windows. Maximum seed yield of mesta was obtained when the crop was
sown during 1st week of August (D2), which was however, found parity with 3rd week of July (D1) sowing. Significantly higher stalk yield of mesta was obtained with early sowing (D1). Except number of seeds per capsule, all the yield attributing parameters were found to decrease significantly with the most delayed sowing (D4).
Plant height and number of branches per plant were not altered significantly due to different spacing practices tried. Significantly superior values for dry matter accumulation and crop growth rate were noticed with closer spacing (S4-15 cm ? 10 cm) than the remaining spacing. Significantly higher relative growth rate was found at a wider spacing of 30 cm ? 10 cm (S1), which was however, found similarity with S3 (15 cm ? 10 cm) and S2 (20 cm ? 10 cm). Mesta sown at a closer spacing of 15 cm ? 10 cm (S4) took maximum number of days to reach 50 % flowering which was significantly more than the remaining spacings tried.
Significantly higher number of capsules per plant in roselle was observed with wider spacing of 30 cm ? 10 cm (S1), which was however, on a par with 15 cm ? 15 cm (S3). Differences were not significant among various spacing practices with regard to the number of seeds per capsule and 1000 seed weight. Roselle sown at a closer spacing S4 (15 cm ? 10 cm) produced maximum seed yield which was however, found parity with S2 (20 cm ? 10 cm). Roselle crop sown at a closer spacing of 15 cm ? 10 cm (S1) recorded significantly higher stalk yield over other spacing tried.
Interaction effect between sowing window and spacing were found to be non significant in respect of plant height, number of branches per plant, days to 50 % flowering, number of seeds per capsule and 1000 seed weight. Sowing of mesta during 3rd week of July (D1) at a spacing of 15 cm ? 10 cm (S4) was found to be significantly superior in dry matter accumulation and crop growth rate over rest of the treatment interactions. Sowing of roselle during 1st week of September (D4) at a wider spacing of 30 cm ? 10 cm (S1) was found to provide higher relative growth rate, which was however, on a par with S3 (15 cm ? 15 cm) at the same sowing window (D4). Sowing of roselle during 3rd week of July (D1) at a wider spacing of 30 cm ? 10 cm (S1) was found to be significantly superior in producing maximum number capsules per plant, which was however, found parity with S3 (15 cm ? 15 cm) at the same sowing window (D1), D2 (1st week of August) at S1 (30 cm ? 10 cm) and S3 (15 cm ? 15 cm). Maximum seed yield (1089.4 kg ha-1) was realized when mesta crop was sown at a spacing of 20 cm ? 10 cm with a population of 5,00,000 plants ha-1 (S2) when sown during 1st week of August (D2) which was however, comparable with S4 (15 cm ? 10 cm - 6,66,666 plants ha-1) when sown during D1 (3rd week of July), D2 at S4 and D1 at S1 (30 cm ? 10 cm- 3,33,333 plants ha-1). Highest stalk yield was registered when roselle was sown during 3rd week of July (D1) at 15 cm ? 10 cm (S4), which was significantly higher over all other D x S interactions. Roselle crop sown during 1st week of August (D2) at a spacing of 20 cm ? 10 cm (S2) produced highest gross returns, net returns and returns per rupee invested compared to the other sowing window and spacing tried.
 
Date 2016-11-30T11:03:42Z
2016-11-30T11:03:42Z
2014
 
Type Thesis
 
Identifier 110p.
http://krishikosh.egranth.ac.in/handle/1/88330
 
Language en_US
 
Relation D5042;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY