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Influence of Green Manuring Crops on Dry Matter Production and Soil Health Improvement

I. J. Irin
PhD Fellow, Dept. of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

P.K. Biswas
Professor
Dept. of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M.J. Ullah
Professor
Dept. of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

T.S. Roy
Professor
Dept. of Agronomy, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M.A. Khan
Professor
Dept. of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

The field experiment was conducted at the Agronomy farm of Sher-e- Bangla Agricultural University to evaluate the impact of different kind of green manures on soil nutrient balance through adding biomass and N,P and K accumulation. Green manuring crops were incorporated after in situ cultivation and results showed that, the biomass incorporation increased the N production in soil. The biomass from Sesbania rostrata, Sesbania aculeata and Crotalaria juncea gave the higher dry matter and nutrient status. Incorporation of Sesbania rostrata and Sesbania aculeata added more organic matter and nitrogen to the soil after green manure incorporation than the prior soil. However, the improved soil quality was recorded with S. rostrata and S. aculeata followed by C. juncea and V. unguiculata incorporation as compared to control (no green manure) and other green manuring crops. The nutrient balance of soil after incorporation of different green manuring crops specially S. rostrata, S. aculeata and C. juncea showed positive balance of nutrients than other green manures.

Keywords: Green manuring, Soil health, Nutrient balance, Dhaincha, Sunnhemp, Mungbean, Cowpea

Location: Agronomy farm of Sher-e-Bangla Agricultural University

Start Date: 00-04-2015

End Date: 00-06-2015

Program Area: Crop-Soil-Water Management

Commodity: Manures, Soil fertility

Objectives:

The present experiment was undertaken to study the feasibility of improving soil quality through green manuring.

Methodology:

The field experiment was conducted at the Agronomy farm of Sher-e-Bangla Agricultural University during April - June, 2015 to evaluate the impact of different kinds of green manures on soil nutrient balance through adding biomass and N,K and P accumulation. The green manure crops viz. Deshi dhaincha (Sesbania aculeata), African dhaincha (Sesbania rostrata), Sunnhemp (Crotolaria juncea L.), Mungbean (Vigna radiata), Blackgram (Vigna mungo), Cowpea (Vigna unguiculata), Ipil-ipil (Leucaen aleucocephala) and Mimosa (Mimosa pudica) were grown for improving soil fertility along with a control (no green manuring crop). The initial soil of the experimental field (0-15 cm) was collected for analyzing physical and chemical properties before setting the experiment. The experiment was laid out in a Randomized Complete Block Design with three replications. There were eight different green manuring crops along with a control as treatments having three replications. The experimental plots (except control) were fertilized with 20-17.6-24.9 kg N, P and K ha^-1 from their sources of Urea, TSP and MoP. Fifty days-old green manuring crops were incorporated after in situ cultivation. Thirty days after incorporation of green manuring crops, the final soil samples of each experimental plot (0-15 cm) was collected for analyzing physical and chemical properties. The collected data were analyzed statistically by using the Statistic-10 computer package. The mean comparison of all parameters were done with Tukey’s W- procedure (Gomez and Gomez, 1984).

Source of Information: Bangladesh Agron. J. 2019, 22(1): 39-45

Article Link (Online Journal): DOI: https://doi.org/10.3329/baj.v22i1.44929

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Four green manuring crops viz. S. rostrata, S. aculeata, C. juncea and V. unguiculata were found effective for green manuring in terms of their dry matter production, organic matter, nitrogen and potassium contribution. These green manures could be beneficial for nutrient exhaustive different cropping pattern through nitrogen as well as NK fertilizer saving and increase the soil fertility.

Knowledge Management: Journal