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Effect of Tillage Intensity, Fertilizer and Manure on Root Mass Density, Soil Properties and Their Correlation on Rice (oryza Sativa L.) Yield

M. M. Sarker
Assistant Director
Ministry of Communication, Bangladesh Bridge Authority, Dhaka, Bangladesh.

M. A. Matin,
Professor
Dept. of Soil Science, Bangladesh Agricultural University (BAU), Mymensingh, Bangladesh.

M. G. Hossain
Scientific Officer
Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

M. M. R. Sarker
Scientific Officer
Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

M. S. Huda
Scientific Officer
Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

An experiment was carried out at the Bangladesh Agricultural University Farm, Mymensingh during the Aman season of 2008 to study the effect of tillage intensity, fertilizer and manure on the root mass density soil properties and their correlation on rice yield (BRRI dhan41). The experiment was laid out in a split plot design with three replications. The treatments were three tillage operations as factor A: one passing (P₁), two passing (P₂), and three passing (P₃) of a power tiller and four fertilizer and manure treatments as factor B: recommended dose of fertilizers (FM₀), 50% of N plus rest of recommended dose of fertilizers + cowdung @ 5 t/ha (FM₁), 50% of N plus rest of recommended dose of fertilizers + rice straw @ 5 t/ha (FM₂) and 50% of N plus rest of recommended dose of fertilizer + cowdung @ 2.5 t/ha plus rice straw @ 2.5 t/ha (FM₃). The highest and the lowest bulk densities were found in P₁FM₀ and P₃FM₂ treatments, respectively. The maximum soil moisture content and air filled porosity were obtained in P₃FM₁ treatment, whereas P₁FM₀demonstrated the lowest soil moisture content. The maximum (8.09 mg cm^-3) and minimum (1.63 mg cm^-3) root mass densities were observed in P₃ (10 cm depth) and P₁ (10-20 cm depth) treatments, respectively. The highest grain yield was recorded in P₃FM₀ treatment. Root mass density was positively correlated with soil moisture content and grain yield, but negatively with bulk density.

Keywords: Tillage, Fertilizer, Manure, Correlation, Yield

Location: Bangladesh Agricultural University Farm, Mymensingh

Start Date: 28-07-2008

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To evaluate the effect of tillage operations, fertilizer and manure on the root mass density, soil properties and yield of rice.

Methodology:

The experiment was conducted at the Bangladesh Agricultural University Farm during the Aman (Kharif-2) season of 2008. The experimental field belongs to the "Old Brahmaputra Floodplain" agroecological zone (AEZ-9). The land was first opened on 28 July 2008 with the help of a power tiller and it was further ploughed on 3 August 2008. Every ploughing was followed by laddering to have a good tilth. High yielding T. Aman variety BRRl dhan-41 was used as the test crop. The experiment was laid out in a split plot design with three replications. There were two sets of treatments viz. (A) three tillage treatments in main plot, namely P₁,= One passing, P₂= two passings and P₃= three passings of a power tiller (P₃), and (B) fertilizer and manuring treatments in sub-plots, namely (a) recommended dose of fertilizer (FM₀), (b) 50% of N plus rest of recommended dose of fertilizers + cowdung @ 5 t/ha (FM,), (c) 50% of N plus rest of recommended dose of fertilizers + rice straw @ 5 t/ha (FM₂), and (d) 50% of N plus rest of recommended dose of fertilizers + cowdung @ 2.5t/ha + rice straw @ 2.5 t/ha (FM₃). The unit plot size was 4.0m x 2.5m, plot to plot spacing was 0.5m and block to block was 1m. The cowdung and the rice straw were applied after the first tillage operation and incorporated into the soil thoroughly. The land was fertilized by applying N, P, K, S, and Zn fertilizer. Data were recorded from five randomly selected samples of each treatment. Data were statistically analyzed using MSTAT-C computer program.

Source of Information: BANGLADESH JOURNAL OF AGRICULTURAL RESEARCH, Vol-37 (3), pp. 529-535, September 2012, ISSN 0258-7122.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Root mass density was positively correlated with soil moisture content and grain yield of rice, but had a negative relationship with bulk density. Regarding tillage treatment and fertilizer and manuring, the treatment combination P₃FM₀ (three passing of a power tiller with recommended dose of fertilizer) was most suitable for both root mass density and yield of rice.

Knowledge Management: Journal