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Effect of Double or Triple Rice Cropping on Yield Maximization and Soil Fertility

S M Mofizul Islam
Scientific Officer
Soil Science Division, BRRI Gazipur

Masuda Akter
Senior Scientific Officer
Soil Science Division, BRRI Gazipur

Pranesh Kumar Saha
Principal Scientific Officer
Soil Science Division, BRRI Gazipur

A. Latif Shah
Chief Scientific Officer
Soil Science Division, BRRI Gazipur

Abstract/ Executive Summary:

It was observed that STB dose and 50% STB + Mixed manure (MM) produced identical yield but higher than farmers practice. However, triple cropping cumulative yield always higher than double rice cropping pattern irrespective of treatments. The yield advantage was more with STB and 50% STB + MM than farmers’ practice. The economic analysis showed that the net income of STB (50%) + MM treatment was higher than all other treatments. It might be the influence of integrated nutrient management effect. The yield scenario of Boro 2010-11 (7th crop) indicates that the yield of triple rice cropping decreased over time compared to double cropping. It means that intensive cropping may deteriorate the soil fertility and the resultant decreased yield was observed in triple cropping pattern.

Keywords: STB dose, Mixed manure, Triple cropping, INM

Location: BRRI farm, Gazipur

Start Date: 01-07-2010

End Date: 30-06-2011

Program Area: Farming System

Commodity: Soil fertility, Rice

Objectives:

To evaluate the effects of fertilizers and integrated nutrient management under continuous wetland culture for sustainable soil health and productivity.

Methodology:

The experiment was initiated in Boro 2009 at BRRI farm Gazipur in clay loam soil. Under this experiment in double cropping pattern (Boro-Fallow-T.Aman) BRRIdhan29 and BRRI dhan49 were used as test variety. In triple cropping pattern (Boro-T.Aus-T.Aman) BRRIdhan29, BRRIdhan43 and BR22 were used as test variety. Four treatment combinations were tested viz. T1= Control, T2= STB dose (NPKS @ 160-25-60-20 kg ha-1 for Boro, 70-12-48-10 kg ha-1 for T. Aus and 84-15-54-14 kg ha-1 for T. Aman), T3= STB (50%) + Mixed manure (cow dung 2 t ha-1 + ash 1 t ha-1as oven dry basis), T4= Farmers’ practice (NPKS @ 80-10-20-10 kg ha-1 for Boro, 70-10-15-0 kg ha-1 for T. Aus and 70-10-15-0 kg ha-1 for T. Aman). The experiment was laid out in a RCB design with three replications. Urea N was applied in three equal splits i.e. 1/3 at final land preparation, 1/3 at active tillering stage and 1/3 at 5-7 days before PI stage. Cow dung, ash, TSP, MOP and gypsum were applied at final land preparation. The unit plot size was 8m X 5 m. Two to three seedlings were used per hill with 20cm X 20cm spacing. At maturity, the crop was harvested from 5 m2 areas at the centre of each plot and 16 hills were collected for straw yield. The grain yield was recorded at 14% moisture content and straw yield as oven dry basis.

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2010- 2011

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

INM was a good option for obtaining higher rice yields either double or triple rice cropping pattern. But it needs long term monitoring in respect of soil fertility evaluation in triple cropping pattern.

Knowledge Management: Report/Proceedings