Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Seed Yield and Quality of Late Season Direct Seeded Kenaf (hibiscus Cannabinus L.) as Influenced by Spacing and Time of De-topping

Md. Abul Fazal Mollah
Jute Research Regional Station, Bangladesh Jute Research Institute (BJRI), Rangpur, Bangladesh

Md. Moshiur Rahman
Dept. of Agronomy, Bangladesh Agricultural University, Mymensingh, Bangladesh

Md. Zablul Tareq
Jute Agriculture Experimental Station, BJRI, Manikganj, Bangladesh

A.B.M. Zahidul Hoque
Genetic Resource and Seed Division, BJRI, Dhaka, Bangladesh

Mir Mehedi Hasan
Adaptive Research Division, Bangladesh Rice Research Institute, Gazipur, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Bangladesh Jute Research Institute (BJRI), Regional Station, Kishoreganj during July to December of 2010 and 2011 to investigate the effect of spacing and de- topping on yield and quality of kenaf seeds cv. HC-95 grown under direct seeding method. Three plants spacings (40 cm × 15 cm, 30 cm × 15 cm and 20 cm × 15 cm) and four de-topping treatments (no de-topping, de-topping at 15, 30 and 45 days after emergence (DAE) were applied in a Randomized Complete Block Design (RCBD) with three replications. The highest yield of kenaf seed (1403 and 1646 kgha^-1 in 2010 and 2011, respectively) was obtained from sowing at 30 cm × 15 cm spacing. The best quality seed in respect to germination and vigour was also obtained from sowing at 30 cm × 15 cm spacing. The highest seed yield, germination and vigour of seed were obtained for de- topped at 45 days after emergence. It is concluded that the highest seed yield and quality of late season direct seeded kenaf could be obtained by sowing at a spacing of 30 cm x 15 cm and de-topping at 45 days after emergence.

Keywords: Kenaf, De-topping, Plant spacing, Yield, Branching, Germination, Vigour

Location: Bangladesh Jute Research Institute (BJRI) Regional Station Kishoreganj,

Start Date: 00-07-2010

End Date: 00-12-2011

Program Area: Crop-Soil-Water Management

Commodity: kenaf

Objectives:

To find out the effect of spacing and time of de-topping on yield and quality of kenaf seed under direct seeded method in Bangladesh.

Methodology:

The experiment was conducted at the Bangladesh Jute Research Institute (BJRI), Regional Station (24°38´North latitude and 90°13´ East longitudes and at an altitude of 18 m), Kishoreganj, Bangladesh during July to December 2010 and 2011. The soil of the studied area belongs to Old Brahmaputra Floodplain Agro Ecological Zone, ‘AEZ-9’ (UNDP and FAO, 1988). The field was medium high land having well-drained silty loam soil with p^H 6.75. The experiment comprised of four times of de- topping viz., no de-topping, de-topping at 15, 30 and 45 days after emergence (DAE) and three plant spacing viz., 40 cm × 15 cm, 30 cm × 15 cm and 20 cm × 15 cm. The trial was laid out in a randomized complete block design with three replications. The unit plot size was 3 m × 2 m. Kenaf variety HC-95 was used as test crop. The experimental plots were fertilized with urea, triple super phosphate (TSP), muriate of potash (MoP) and gypsum @ 180-50-20-50 kg ha^-1, respectively. All fertilizers except urea were applied during final land preparation. Urea was top dressed in three equal splits at 15, 30 and 45 days after sowing (DAS). The seed was sown @ 12 kg ha^-1 on 30 July in both the years. Weeding was done by hand at 25 and 45 days after sowing (DAS). Thinning was done to maintain plant to plant distances of about 15 cm in line along with the weeding operation. The crop was infested by mealy bug and white fly at the vegetative stage those were successfully controlled by spraying Ripcord 10 EC @ 2mlL^-1 of water for three times at an interval of 10 days. No irrigation was needed while excess water was drained out as and when necessary. Prior to harvesting, 10 plants from each plot were harvested to collect data on different crop characters, such as number of pods plant^-1, seeds pod^-1, 1000-seed weight, seed yield plant^-1. The crop was hand harvested at maturity i.e. when 80% of the capsules become brown in color. Threshing was done with a hammer after 2-3 days sun drying. Then seeds were sun dried on jute mat placed on cemented floor for 5-6 days to have around 8% moisture content. After cleaning, the seed was stored in thick polythene bags and kept in the laboratory until further use for quality tests. Standard laboratory germination test, electrical conductivity and accelerated ageing tests were done to record on germination and vigour of seed. A brief description on different laboratory tests is given below. The test was conducted on top of the paper method. One hundred seeds in four replications were placed on the moist paper (two fold of Bashundhara kitchen towel) in petridish (11 cm diameter). The petridishes were kept in the germinator maintain temperature at 30 ±1^oC. Daily counting of the germinating seedlings were done up to 8 days of seed setting. The number of normal seedling was counted at 8 DAS and the germination percentage of seed was measured with the following formula: Germination (%) = Number of normal seedling/Number of seeds set for germination x 100. The numbers of germinated seedlings were counted daily from the germination test up to 8 days. Randomly selected 50 seeds were taken in a 250 ml flasks containing 75 ml de-ionized water and were kept at 20^oC(±1°C). Electrical conductivity of seed leachate was measured after 24 hours using a conductivity meter (Model-YSI 3200) and the values were expressed inµscm^-1g^-1 (AOSA, 1983). Four replicates of 50 seed from each seed lot were used in the test. Accelerated ageing seed was done by taking 15 g seed in accelerated ageing chamber and exposing the seeds to 41⁰C temperature and 100% RH for 72 hours. For conducting the AA test, seeds were weighed and placed on a screen tray (10.0 × 3.5 × 3.0 cm) which is inserted into an inner chamber (plastic box: 10.0 × 6.0 × 4.0 cm) containing 50 ml of water. The boxes were covered with lids and kept airtight. The inner chamber is placed into an accelerated ageing (outer) chamber. During the ageing period the seeds absorb moisture from the humid environment within the inner chamber and are stressed by high temperature and RH. After accelerated ageing, germination test of seeds was done using modified paper folding method (ISTA, 1999). The collected data on different yield related characters and seed quality parameters were subjected statistical analysis following ANOVA technique. Differences among treatment means were adjusted by Duncan’s Multiple Range Test with the help of a computer based statistical package program MSTAT-C (Gomez and Gomez, 1984).

Source of Information: The Agriculturists 15(1):92-100(2017)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The result of the present study concludes that the highest yield of kenaf seed was obtained for the crops sown at 30 cm × 15 cm spacing and de- topped at 45 DAE. The best quality seed in respect to germination and vigour was also obtained for at 30 cm × 15 cm spacing. The study concludes that late season kenaf produces highest seed yield with best quality when sown at 30 cm × 15 cm spacing and for de-topping at 45 DAE.

Knowledge Management: Journal