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Effect of Bioslurry on Transplanted Aus Rice Under Rainfed Condition in Sylhet

M.R. Shaheb
Senior Scientific Officer
On-Farm Research Division, Bangladesh Agricultural Research Institute (BARI), Sylhet-3100, Bangladesh

M. I. Nazrul
Senior Scientific Officer
On-Farm Research Division, Bangladesh Agricultural Research Institute (BARI), Sylhet-3100, Bangladesh.

Abstract/ Executive Summary:

An experiment was conducted in farmer’s field with the aim to evaluate the effect of integrated use of bioslurry and inorganic fertilizer on the agroeconomic performance of transplanted aus rice (t. aus) (cv. BRRI dhan42) in AEZ 20. The trial was laid out in a randomized complete block design with three replications. There were three treatments viz., T1: soil test based inorganic fertilizer dose for high yield goal (HYG), T2: cowdung (CD) slurry @ 5 t ha^-1 with integrated plant nutrition system (IPNS) basis inorganic fertilizer dose for HYG and T3: Farmer’s practice (average of 20 farmers fertilizer dose). The highest mean grain yield (3.93 t ha^-1) of t. aus rice was obtained from the treatment T2 followed by T1 (3.46 t ha^-1). Gross return, gross margin and benefit cost ratio were also observed higher in T2. Therefore, fertilizer package NPKSZn @ 56-4-20-9-1 kg ha^-1 + cow dung slurry @ 5 t ha^-1 in IPNS approach might be helpful for getting higher grain yield of t. aus rice and maintaining sustainable soil health as well.

Keywords: Bioslurry, IPNS, Transplanted Aus rice, Benefit cost ratio, Soil health

Location: At farmer’s field in multilocation testing site, Moulavibazar (AEZ 20)

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Crop-Soil-Water Management

Commodity: Bio fertilizer

Objectives:

The present study was undertaken to evaluate the efficiency of bio-slurry on the performance of t. aus rice under rainfed condition in AEZ 20.

Methodology:

The experiment was conducted at farmer’s field in multilocation testing site, Moulavibazar (AEZ 20) during the two consecutive years of 2011 and 2012 under rainfed condition in AEZ 20. The experiment was laid out in a randomized complete block design with three replications. Three fertilizer treatments viz., T1: soil test based inorganic fertilizer dose for high yield goal (HYG), T2: cowdung (CD) slurry @ 5 t ha^-1 with IPNS basis inorganic fertilizer dose for HYG and T3: Farmer’s practice (average of 20 farmers fertilizer dose applied in transplanted aus rice) were used in the trial. Treatment-wise nutrient elements were calculated based on the initial soil nutrient status with the help of FRG (2005). The unit plot size was 6m × 5m. Rice variety BRRI dhan42 of transplanted aus (t. aus) was used in the trial. Entire amounts of cow dung slurry as per treatment were applied 4 days before final land preparation. The whole amount of phosphorus (P), potassium (K), sulphur (S), boron (B) and 1/3 of nitrogen (N) were applied during final land preparation. The rest of N was top dressed at 21 and 45 days after transplanting of aus rice. Twenty seven day old aus rice seedlings were transplanted on 08-10 June 2011. Plant protection measures and other intercultural operations were done as and when necessary. The crop was harvested on 15 and 17 August in 2011 and 2012, respectively. Five years average monthly maximum and minimum temperatures and monthly total rainfall data have been presented in Fig. 1. Data on yield attributes viz., plant height, plants per m2, effective tillers per plant and 1000 grain weight were recorded in time. Individual plot-wise data on grain and straw yields were recorded and converted into t ha-1. Harvest index and biological yield were calculated by the following formula (Equ. 1 and 2). The collected data were analyzed statistically following the ANOVA technique with the help of MSTAT- C software. The mean differences among the treatment means were adjudged by Least Significant Difference (LSD) test (Gomez and Gomez, 1984).

Harvest Index (%)= (Grain Yield)/ (Biological Yield) X 100 …………………………………….(1)

Biological Yield = Grain Yield + Straw Yield …………………............(2)

Source of Information: Bangladesh J. Agril. Res. 42(3): 467-474, September 2017 ISSN 0258-7122 (Print), 2408-8293 (Online)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results, it can be concluded that application of CD slurry@ 5 t ha^-1 with IPNS based inorganic fertilizer is better than other two treatments to obtain higher yield and economic return of transplanted aus rice. Cost benefit analysis also confirmed that the same treatment provided the highest gross return, net return and BCR. Soil nutrient status after harvest of t. aus rice also slightly increased due to application of bioslurry with inorganic fertilizers in the soil. Thus, it is recommended that farmers of AEZ 20 should apply cowdung slurry with IPNS basis inorganic fertilizer dose in their field for getting higher economic return and better soil health.

Knowledge Management: Journal