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Nutrient Management for a Rooftop Garden (2018–2019)

A. Barman
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

I. S. M. Farhad
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

R. Sen
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

M. M. Masud
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

R. Khatun
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

S. Akhter
Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

Abstract/ Executive Summary:

The study has been conducted in Gazipur (rooftop of Soil Science Division) during the year of 2017-18 and 2018-19. Two types of research work have been conducted in this work. One is integrated nutrient management-based research (Organic and inorganic fertilizer combination) and another is towards the soil to organic materials ratio-based research for safe food production in the rooftop garden. The experiment activities include fertilizer management of some vegetables, fruits and flowers; and the influence of the different ratios of soil and organic materials on the growth and yield of vegetables, fruits and flowers for a rooftop garden. Prior to setting the experiments initial soil samples, as well as organic fertilizers, were analyzed and nutrient statuses were determined. In case of experiments regarding nutrient management of some vegetables, fruits and flowers, T₇treatment (80% of T₁+ 2 kg vermicompost 6 kg^-1 soil) showed the best performance followed by T₃ treatment (80% of T₁+ 2 kg kitchen waste 6 kg^-1soil) for maximizing the yield of vegetables and flowers grown on the rooftop garden. Vegetables (sweet pepper, bottle gourd & bitter gourd), fruits (strawberry) and flowers (periwinkle, gladiolus & gerbera) performed better in T₅treatment (1 kg vermicompost for 1 kg soil) compared to others in the experiments related to the influence of the different ratio of soil and organic materials on the growth and yield of vegetables, fruits and flowers for a rooftop garden. The lowest yield was recorded from the T₄treatment (1 kg cowdung for 2 kg soil). Results showed that T₅treatment gave a 20-240% higher yield over other treatments.

Keywords: Yield, Rooftop garden, Vegetables, Fruits and Flowers

Location: Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh

Start Date: 00-00-2017

End Date: 00-00-2019

Program Area: Resource Development and Management

Commodity: Fertilizer and manures

Objectives:

To maximize the yield of a rooftop garden as well as ensure family nutrition of the urban people.

Methodology:

The experiment was conducted at the rooftop of Soil Science Division, BARI, Gazipur during 2017-18. The initial soil sample, vermicompost, compost and cowdung collected before establishing the experiment was analyzed in the laboratory following standard methods. Chemical parameters of the experimental soil and other organic materials are presented. Nutrient management-based research (Organic and inorganic fertilizer combination) for food production in the rooftop garden was laid out in a randomized complete design with three replications. For nutrient management based research eight different treatments viz. T₁= 100% STB (Soil Test Based Fertilization = N₁₈ P₃ K₄ S_0.2 gm m^-2), T₂= T₁+ 1 kg kitchen waste (decomposed) 6 kg^-1 soil, T₃= 80% of T₁+ 2 kg kitchen waste (decomposed) 6 kg^-1 soil, T₄= T₁+ 1 kg cowdung 6 kg^-1soil, T₅= 80% of T₁+ 2 kg cowdung 6 kg^-1soil, T₆= T₁+ 1 kg vermicompost 6 kg^-1soil, T₇=80% of T₁+ 2 kg Vermicompost 6 kg^-1soil & T₈= Absolute control were selected. Different types of the pot (Tob, Half dram and Wood box) were used. Different vegetables namely Tomato (BARI Tomato-15), Bt. Brinjal (BARI Bt. Brinjal-2), Chilli (Baromashi), Red Amaranth (BARI Lalshak-1), Indian Spinach (BARI Puishak-2), Amaranth (BARI Danta-2), Kangkong (BARI Gimakolmi-1), Spinach (BARI Palongshak-1), Batishak (BARI Batishak-1), Chinashak (BARI Chinashak-1) were cultivated. Three fruits namely Lemon (Seedless), Mango (BARI Aam-3) and Dragon fruit(BARI Dragon Fruit-1) were cultivated. Three flowers namely Rose (Hybrid), Marigold (Inca) and Tuberose (Single) were cultivated. Fertilizer N-P-K-S-Zn and B were supplied from urea, TSP, MoP, gypsum, zinc sulphate and boric acid, respectively. In the case of vegetables and seasonal flowers, all organic fertilizer and PKSZnB and ¹/₃of N were applied at the time of final soil preparation. The remaining two-thirds of N was applied as top dress after sowing. In the case of fruits and rose, all organic fertilizer and ¹/₆ PKSZnB and ¹/₆of N were applied at the time of final land preparation. The remaining fertilizers were applied as top-dressing at two months intervals after transplanting. Irrigation s and other intercultural operations were done as when required. The soil used in the rooftop garden is sandy loam in texture having a pH of 6.5. The organic matter was low (1.09%) and total N content was very low (0.08%). Available P, K ,S & B were medium, low, medium & low respectively but available Ca, Mg and Zn existed at a satisfactory level.

Source of Information: Annual Research Report 2018–2019, Soil Science Division, BARI, Joydebpur, Gazipur, Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on the results, it may be concluded that 80% of STB doses along with 2 kg vermicompost 6kg^-1 soil was more effective than other fertilizer management packages for maximizing the yield of different vegetables, fruits and flowers grown on the rooftop garden. So, T₇ treatment packages (80% of T₁ + 2 kg vermicompost 6kg^-1 soil) may be recommended for the rooftop gardeners for the cultivation of different vegetables, fruits and flowers. The lowest growth and yield performance were obtained from the control treatment. 80% of STB doses along with 2 kg kitchen waste 6kg^-1 soil could also be recommended as it also provided higher yield and kitchen waste compost is domestically and easily made by the rooftop gardeners. This is the result of a 1st-year study, so further investigation will be required for the confirmation of the findings.

Knowledge Management: Report/Proceedings