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Performance of Gima Kalmi (ipomoea Reptans) Under Lemon and Guava Tree as Influenced by Plant Density

S. M. Shafi
Department of AgroforestryBangladesh Agricultural University, Mymensingh-2202

G. M. Mujibar Rahman
Department of AgroforestryBangladesh Agricultural University, Mymensingh-2202

M. A. Rahim
Department of Horticulture, Bangladesh Agricultural University, Mymensingh-2202

M. S. Alam
Fruit Tree Improvement Project, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

The experiment was conducted at the Germplasm Centre, Horticulture Farm, Bangladesh Agricultural University, Mymensingh during the period from April to May 2007 to study the effect of different plant density and tree canopy on the growth and yield of Gima Kalmi (Ipomoea reptans).The experiment consisted of three levels of plant density viz., 30 cm × 15 cm, 30 cm × 25 cm and 30 cm × 30 cm and three tree canopy orientation viz. no canopy (open condition), lemon canopy and guava canopy were included in this experiment. The experiment was laid out following RCBD with three replications. Performance of Gima Kalmi grown under no canopy, lemon canopy and guava canopy in different orientation were evaluated. The plant height, number of leaves per plant, number of branches per plant, fresh weight of foliage per plant, yield per plot and yield per hectare grown under lemon and guava canopy showed significantly reduction than those grown in no canopy. The ranked order of different canopy orientation for better performance were no canopy>lemon canopy>guava canopy. In case of plant density The maximum growth and yield of the plant were observed in 30 cm × 30 cm and 30 cm × 15 cm density, respectively. The highest yield (8.85 t/ha) was found at the closest density (30 cm × 15 cm) whereas the lowest yield (4.77 t/ha) was obtained from the widest density (30 cm × 30 cm) at 45 DAS. The combined effect of plant density and canopy showed that is the highest yield (12.60 t/ha) was produced is 30 cm × 15 cm density at 45 DAS under no canopy whereas the lowest yield (3.20 t/ha) was obtained from 30 cm × 30 cm density at same harvest time under guava canopy. Moderate yield (7.98 t/ha) was found under lemon canopy of plant density on the same harvesting time.

Keywords: Gima kalmi, Canopy, Plant density, Lemon and guava

Location: Germplasm Centre of Fruit Tree Improvement Project, Horticulture Farm of Bangladesh Agricultural University, Mymensingh

Start Date: 03-04-2007

End Date: 07-05-2007

Program Area: Farming System

Commodity: Guava, Spinach, Lemon

Objectives:

1. To evaluate the performance of Gima kalmias under storied crops in a lemon and guava orchard

Methodology:

The experiment was conducted in the field laboratory of Germplasm Centre of Fruit Tree Improvement Project, Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period from 3rd April to 17th May, 2007 to investigate the performance of Gima kalmi (Ipomoea reptans) under guava and lemon as influenced by plant density. The present experiment comprised of two factors, viz. Factor A: It included three canopy orientations: No (without tree) canopy, (C₀) Lemon canopy (C₁) and Guava canopy (C₂); Factor B: three plant density, D₁ = 30 cm × 15 cm ,D₂ = 30 cm × 25 cm and D₃ = 30 cm × 30 cm was laid out following Randomized Complete Block Design (RCBD) with three replications. Gima Kalmi seeds were used. Seeds rate 1 gm/1 m2 land. The following doses of manure and fertilizers were applied as recommended by BARI. Cowdung 1 kg/plot, Triple superphosphate (TSP) 11 gm/plot, Muriate of potash (MP) 11 gm/plot, Urea 37 gm/plot .The unit plot size was 1.0 cm × 1.0 m. Two seeds were sown in each planting hole at one cm depth and covered with a thin layer of soil. Thinning was done seven days after emergence and only one seedling was allowed to grow in each hill. Intercultural operation was done as and when necessary. Data were recorded on plant height, number of leaves per plant, number of branches per plant, yield per plant, yield per plot, yield per hectare. The mean differences were evaluated by Least Significant Difference (LSD) test.

Source of Information: J. Agrofor. Environ. 1(2): 161-163, 2007; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The ranked order of different canopy orientation for better performance were no canopy>lemon canopy>guava canopy. In case of plant density The maximum growth and yield of the plant were observed in 30 cm × 30 cm and 30 cm × 15 cm density, respectively. The highest yield (8.85 t/ha) was found at the closest density (30 cm × 15 cm) whereas the lowest yield (4.77 t/ha) was obtained from the widest density (30 cm × 30 cm) at 45 DAS. The combined effect of plant density and canopy showed that is the highest yield (12.60 t/ha) was produced is 30 cm × 15 cm density at 45 DAS under no canopy whereas the lowest yield (3.20 t/ha) was obtained from 30 cm × 30 cm density at same harvest time under guava canopy. Moderate yield (7.98 t/ha) was found under lemon canopy of plant density on the same harvesting time.

Knowledge Management: Journal