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Pre-rice Green Manuring on the Growth and Yield of BINA Dhan7

N. Jahan
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.R. Islam
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.H. Sumon
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

A. Huda
Department of Soil Science, Sylhet Agricultural University, Sylhet-3100, Bangladesh

S. Bilkis
Department of Soil Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh during Aman season of 2013 to study the effect of pre-rice green manure (GM) on the growth and yield of BINA dhan7. To undertake field trial with GM, five treatments were chosen: Fallow (No GM), GM with Deshi Dhaincha (Sesbania aculeata), African Dhaincha (Sesbania rostrata), Black gram (Vigna radiata) and Mungbean (Vigna mungo). After chopping GM at 50 days, short duration T. Aman rice BINA dhan7 was planted. For T. Aman there were nine treatment combinations: T₁ (No GM + 100%RDN), T₂ (Sesbania aculeata + 75%RDN), T₃ (Sesbania aculeata + 50%RDN), T₄ (Sesbania rostrata + 75%RDN), T₅ (Sesbania rostrata + 50%RDN), T₆ (Vigna radiata + 75%RDN), T₇ (Vigna radiata + 50%RDN), T₈(Vigna mungo + 75%RDN) and T₉ (Vigna mungo + 50%RDN). The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The recommended fertilizer doses were used to supply N, P, K and S from Urea, TSP, MoP and gypsum, respectively. Among the yield contributing characters the panicle length and grains/panicle differed significantly due to different treatments which resulted in significant effect on the grain and biological yields of BINA dhan7. However, the other yield components and straw yields were statistically similar. The highest grain yield was found in T₂ (Sesbania aculeata + 75%RDN) which was statistically similar to T₆ (Vigna radiata + 75%RDN) and the lowest grain yield of 4125 kg ha^-1 was found in T₈ (Vigna mungo + 75%RDN). The straw yields were identical in all the treatments. The N uptake by BINA dhan7 was also influenced by different treatments. The overall results indicate that use of Sesbania aculeata or Vigna radiata as pre-rice green manure with 75% recommended dose of nitrogen fertilizer could be recommended for higher production of BINA dhan7 in Aman season.

Keywords: Green manure, BINA dhan7, Rice yield, N uptake

Location: Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh

Start Date: 00-05-2013

End Date: 00-11-2013

Program Area: Crop-Soil-Water Management

Commodity: Manures

Objectives:

To observe the effect of pre-rice green manuring on the growth and yield of BINA dhan7 and to find out a suitable combination of green manure and N fertilizer for growing BINA dhan7

Methodology:

The experiment was carried out at the Soil science Field Laboratory, Bangladesh Agricultural University, Mymensingh during May-November 2013 to study the effect of green manure on the growth and yield of BINA dhan7. The experimental soil belongs to the Sonatala series under the AEZ of Old Brahmaputra Floodplain. Characteristically, the soil was silt loam in texture having pH 6.39, organic matter content 1.72%, and total N 0.039%. The experiment was designed with 9 treatments laid out in randomized complete block design with three replications. The unit plot size was 5m x 4m. The treatments used in the experiment were T₁ (No GM + 100% RDN), T₂ (Sesbania aculiata + 75%RDN), T₃ (Sesbania aculiata + 50%RDN), T₄ (Sesbania rostrata + 75%RDN), T₅ (Sesbania rostrata + 50%RDN), T₆ (Vigna radiata + 75%RDN), T₇ (Vigna radiata + 50%RDN), T₈ (Vigna mungo + 75%RDN), T₉ (Vigna mungo + 50%RDN). Green manuring crop was incorporated into the soil at 50 DAS. Nitrogen, phosphorus, potassium and sulphur were supplied through urea, TSP, MoP and gypsum, respectively. The recommended fertilizer doses applied for the experiment were 180 kg urea ha^-1, 120 kg TSP ha^-1, 70 kg MoP ha^-1, 50 kg gypsum ha^-1. TSP, MoP and gypsum were applied as basal dose during final land preparation. Urea was applied in three installments (The first installment at 13 DAT, the second at 32 DAT and the third at 43 DAT). The seedlings of 25 days old were transplanted in the plots on the 8th August, 2013. Intercultural operations were done as and when necessary. The crop was harvested at full maturity. Five hills were randomly selected from each plot to record the yield contributing characters. Grain and straw yields were recorded plot wise and converted to kg ha^-1. Grain and straw samples were collected, dried, ground, sieved and finally chemical analysis was done. The nitrogen was analysed by micro-kjeldahl method. All the data were statistically analyzed following F-test and mean comparison was made by Duncan s New Multiple Range Test (DMRT).

Source of Information: J. Soil Nature 7(2):19-22, (2014)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In the present research, it was found that panicle length, filled grains per panicle, 1000- grain weight, grain and straw yield and N uptake were higher in the plots treated with green manure in combination with 75% recommended fertilizer. Among the green manuring crops used in the experiment Sesbania aculeata performed better. However, there was no significant difference between Sesbania aculeata and Vigna radiata. Therefore, use of Sesbania aculeata or Vigna radiata with 75% of recommended fertilizer N application could be recommended for BINA dhan7 production during Aman season in Bangladesh.

Knowledge Management: Journal