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Research Detail

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Md. Sajidur Rahman
Senior Scientific Officer
Soil Science Division, BRRI Gazipur

Masuda Akter
Senior Scientific Officer
Soil Science Division, BRRI Gazipur

S. M. Mofizul Islam
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

In perpetual wet condition the annual rice production (three crops) is decreasing in unfertilized plot over time. On the other hand, complete treatment (NPKSZn) is maintaining the static yield over time. However, the reverse control management i.e. addition of complete fertilizer (NPKSZnCu) produced similar yield as complete fertilizer treatment. It clearly indicates that the soil has the capability to produce optimum yield when it receives balanced fertilizer. In unfertilized condition, the yield of 2010-2011 cropping pattern came down below 1 t/ha of each variety except BRRI dhan46 (T. Aman) irrespective of seasons over 30 years. While in 1981 yields of unfertilized plot were recorded as 2.1 t/ha for Boro (BR3), 1.7 t/ha for T. Aus (BR1) and 2.6 t/ha for T. Aman (BR11).

  Wetland, T. Aus, N, P, K, Zn, Soil fertility and Productivity
  BRRI farm, Gazipur
  01-07-2010
  30-06-2011
  Crop-Soil-Water Management
  Fertilizer

To evaluate the consequences of intensive cropping under continuous wet land condition 2. to monitor soil fertility changes over time.

This experiment was initiated in 1971 in a permanent layout with an objective to grow three rice crops (Boro, T.Aus and T.Aman) annually with NPK fertilizer application keeping the soil perpetually wet. Since Boro 2000, the experiment was modified to accommodate six treatments viz. control (native nutrient), reverse control (NPKSZnCu), NPK, NPKS, NPKSZn and NPKSZnCu. The varieties tested in T.Aus, T.Aman and Boro seasons are BRRI dhan48, BRRI dhan46 and BRRI dhan50, respectively. The NPK doses were 140-25-80, 60-15-80 and 60-10-60 kg/ha for Boro, T. Aman and T .Aus, respectively. Sulfur, Zn and Cu were applied at the rate of 10, 4 and 1 kg/ha in Boro season only. This experiment was non-replicated.

  Proceedings of BRRI Annual Internal Research Review, 2010- 2011
  
Funding Source:
1.  Government Budget:  
  

The reverse nutrients management indicates that if the soil was fertilized with optimum fertilizer dose may have the capability to produce similar yield as continuously fertilized soil.

  Report/Proceedings
  

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