Feasibility of Replacing Chemical Fertilizer by Using Organic Fertilizer in Wheat (Triticum aestivum) Considering Dry Matter Content and Estimatimation of Different Growth Parameters

Abstract

An experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during the period from October 2010 to March 2011 to study the feasibility of replacing chemical fertilizer by using organic fertilizer in wheat. The experiment comprised of 10 treatments, such as T₀: Control condition; T₁: All chemical fertilizer as recommended dose; T₂: Cowdung as recommended dose; T₃: Compost as recommended dose; T₄: ½ Cowdung + ½ Compost; T₅: Cowdung + Compost; T₆: Cowdung + ½ Chemical fertilizer; T₇: Compost + ½ Chemical fertilizer; T₈: Cowdung + Compost +½ Chemical fertilizer and T₉: ½ Cowdung + ½ Compost + ½ Chemical fertilizer. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. At 30, 50, 70, 90 and 110 (Days After Sowing) DAS, the highest dry matter content plant^-1 was recorded from T₁ (0.30 g, 3.87 g, 8.84 g, 19.58 g and 30.18 g), whereas the lowest weight from T₀ (0.18 g, 2.49 g, 6.50 g, 11.80 g and 18.08 g). At 30-50 DAS, the highest (Crop Growth Rate) CGR was found from T₁ (5.35 g m^-2day^-1), while the lowest CGR from T₀ (3.46 g m^-2day^-1). At 50-70 DAS, the highest CGR was found from T₇ (8.34 g m^-2day^-1), while the lowest CGR from T₀ (6.70 g m^-2day^-1). At 70-90 DAS, the highest CGR was found from T₁ (17.89 g m^-2day^-1), while the lowest CGR from T₀ (8.83 g m^-2day^-1). At 90-110 DAS, the highest CGR was found from T₈ (18.69 g m^-2day^-1), while the lowest CGR from T₀ (10.47 g m^-2day^-1). At 30-50 DAS, the highest RGR was found from T₃ (0.134 g g^-1 day^-1) and the lowest RGR from T₅ and T₈ (0.127 g g^-1 day^-1). At 50-70 DAS, the highest RGR was found from T₃ (0.049 g g^-1 day^-1) and the lowest RGR from T₉ (0.041 g g^-1 day^-1). At 70-90 DAS, the highest RGR was found from T₃ (0.040 g g^-1 day^-1) and the lowest RGR from T₀ (0.030 g g^-1 day^-1). At 90-110 DAS, the highest (Relative Growth Rate) RGR was found from T₃ (0.026 g g^-1 day^-1) and the lowest RGR from T₀ (0.021 g g^-1 day^-1). The longest spike (19.86 cm), highest grain yield (3.71 t ha^-1) and highest straw yield (5.78 t ha^-1) was attained from T₁ and the shortest spike (14.33 cm), lowest grain yield (2.06 t ha^-1) and lowest straw yield (4.49 t ha^-1) from T₀.

DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22032

J. Environ. Sci. & Natural Resources, 6(1): 07-10 2013