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Effect of Seedling Age on Yield and Lint Quality of Cotton

M Akhteruzzaman
Cotton Development Board, Khamarbari, Dhaka, Bangladesh,

MB Momtaz
Cotton Research, Training and Seed Multiplication Farm, Sreepur, Gazipur, Bangladesh

S Bari
Cotton Research, Training and Seed Multiplication Farm, Sreepur, Gazipur, Bangladesh

Abstract/ Executive Summary:

The study was conducted in the experimental field of the Cotton Research, Training and Seed Multiplication Farm, Sreepur, Gazipur during June 2018 to February 2019 to find out the effective age of cotton seedling for transplanting. Five categories of seedlings viz.,10, 15, 20, 25 and 30 days old were tested along with direct seed sowing as control treatment. Survival rate of the seedlings among the age categories ranges from 79 to 96%. The highest and lowest survival rates of the seedlings were observed in direct seed sowing and 30 days age category seedlings, respectively. The seedling age did not affect yield and yield contributing agronomic traits like plant height and boll weight. Other agronomic traits namely number of plant per hectare, monopodial branch, sympodioal branch and boll per plant among the seedling age categories differed significantly. The highest numbers of monopodial branch and boll per plant were found in control category and the highest number of sympodioal branch per plant was observed in 15 days age category. The seedling age categories had insignificant effect on lint quality characteristics like length, strength and micronaire value of the lint.

Keywords: Gossypium hirsutum, Plant traits, Yield, Lint

Location: The experimental field of the Cotton Research, Training and Seed Multiplication Farm, Sreepur, Gazipur

Start Date: 00-06-2018

End Date: 00-02-2019

Program Area: Crop-Soil-Water Management

Commodity: Cotton

Objectives:

This study was conducted to evaluate the effect of seedling age an yield ant lint quality of cotton.

Methodology:

Study site and condition: The study was conducted during June 2018 to February 2019 in the Field of Entomology, Cotton Research, Training and Seed Multiplication Farm, Sreepur, Gazipur, Bangladesh. The study site is located in the middle of Bangladesh which occupied 24°22′ North latitude and 90°41′ East longitude. The study area has a tropical climate followed by mean maximum and minimum temperatures, relative humidity and rainfall of 36.0 and 12.7 o C, 65.8% and 237.6 cm, respectively (Amin et al. 2016). Raising of seedling: Cotton Gossypium hirsutum L, var. DM-3 seeds were collected from Supreem Seed Company Dhaka. Seeds were sown in seedbed with five days differences viz., 10, 15, 20, 25, 30 days and then transplanted to the main plot along direct seed sowing in the month of August 2018. The distance from row to row was 90 cm and plant to plant 45 cm. Intercultural operations such as irrigation and weeding etc. were done whenever necessary but the crops were kept free from pest management practices. Experimental design and cultivation of cotton: The experiment was laid out in randomized complete block design with three replications. Five categories of seedlings such as 10, 15, 20, 25 and 30 days age were transplanted and direct seed sowing was done as control treatment. The experiment was set up in the month of August, 2018 and the plot size was 4.5 m × 3.6 m. Intercultural operations and observation of cotton agronomic traits: Thinning and earthing up were completed by 20 days after emergence. In case of first thinning, two seedlings per hill were kept after 10 days of emergence. Second thinning was done 20 days after emergence keeping one seedling per hill. N, P, K, S was fertilized @ 120:45:131:27 kg ha^-1. One forth of Urea and half of MOP were applied during final land preparation as basal dose. The rest amount of urea was applied in three equal splits at 20, 40 and 60 days after sowing as top dressing. Similarly, rest amount of murate of potash was applied at the time of second and third application of nitrogen application. The experimental field was kept weed free up to 60 days after emergence of seedling by hand weeding. Mulching between two rows was done by power tiller. The third week of November and first week of December irrigation were given due to drought situation. Scouting based spray was followed for pest management. Ten plants were selected randomly from each plot and tagged for taking data. Harvesting of seed cotton from the net plot and border are done in three number of picking. Data on plant height at harvest, number of monopodial brunch plant^-1, number of sympodial brunch plant^-1, number of boll plant^-1, individual boll weight, seed cotton yield were taken during experiment. Data analysis: Analysis of variance (ANOVA) followed by LSD was used for analyzing data.

Source of Information: Bangladesh J. Ecol. (2019) 1 (2) : 79-81

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Direct seed sowing produced the highest seed cotton yield followed by 10 days age seedling yield 2.3 ton/ha. Highest single boll weight was found in treatment 6 that is 5.9. Highest boll/plant was found in treatment 6 that is 26.63. Survive rate of cotton plant decreased with increasing the age of seedling transplantation.

Knowledge Management: Journal