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Tomato Production at Different Levels of Light for Agroforestry Systems

M. Giashuddin Miah
Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1703

M. Abiar Rahman
Department of Agroforestry and Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1703

M. Moynul Haque
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1703

Abstract/ Executive Summary:

A field experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University farm during rabi season, 1998-99 to determine the effects of different reduced light levels on the growth, and yield of a tomato variety, Ratan. There were four light treatments of which three reduced light treatments i.e. 75,50 and 25% PAR and one control treatment (full sunlight i.e. 100% PAR). The reduced light treatments were created using mosquito nets of different sieve sizes. All the parameters of tomato were decreased with the light levels decreased except plant height. The shortest plant (52.93 cm) recorded under full sunlight was statistical similar to 75% PAR level. Number of leaves per plant and individual fruit weight showed almost a similar responses where the highest values of both the parameters observed under full sunlight were varied insignificantly up to 75% PAR, and the lowest values observed under 75% reduced light (25% PAR) were also statistically identical to 50% PAR. Number of cluster per plant, number of fruits per plant and fruit diameter showed the similar trends where no significant differences were observed at full PAR, 75% PAR and 50% PAR, although, relatively higher values were observed at relatively higher PAR levels. The marketable yield of tomato obtained under full sunlight (36.09 t/ha) and 25% reduced light (31.75 t/ha) did not vary significantly but yield obtained under 50 and 75 % reduced light levels decreased remarkably. The present results suggest that tomato can be grown at 25% reduced light under agroforestry system without significant yield loss.

Keywords: Reduced light, Tomato growth, Yield components and yield.

Location: Bangabandhu Sheikh Mujibur Rahman Agricultural University farm

Start Date: 00-12-1998

End Date: 00-04-1999

Program Area: Farming System

Commodity: Tomato

Objectives:

To investigate the performance of a tomato variety under different reduced light levels.

Methodology:

The study was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University farm during the period from December, 1998 to April, 1999 with four different light treatments i.e. 100, 75, 50 and 25% photosynthetically active radiation (PAR). The reduced light levels (75, 50 and 25% PAR) were made by using mosquito nets of different sieve sizes. The mosquito nets were imposed up to 8 feet over the plots. The treatments were arranged in a randomized complete block design with three replications. The size of each plot was 2 m X 3 m i.e., 6 square meter. The test variety of tomato was "Ratan". The seedlings of Ratan were collected from the Bangladesh Agricultural Development Corporation farm, Kashempur, Gazipur, and healthy uniform sized seedlings were transplanted with a spacing of 60 cm X 45 cm in the plots on 23 December, 1998. Recommended doses of fertilizers were applied in the plots. All cowdung and TSP were incorporated during the final land preparation. Urea and MP were top dressed in two equal installments at 15 and 35 days after transplanting. The crop was irrigated properly after each top dressed and, thereafter, as and when needed. Recommended cultural operations were done in time. After 75 days of transplanting, five representing plants were tagged from each plot for data collection. Fruits were harvested time to time starting from 15th March '99 and ended on 6th April '99. Growth and yield contributing characters such as plant height, number of leaves per plant, number of primary branch per plant, number of fruits per plant, number of clusters per plant, fruit diameter, individual fruit weight and fruit yield per plot were recorded.

Source of Information: Ann. Bangladesh Agric. 9(2): 139-146, 1999

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It is concluded that tomato can be grown in association with trees without significant yield loss where upperstorey trees would cut 25% incoming radiation. Beyond this light reduction range, yield would be reduced remarkably.

Knowledge Management: Journal