MD. SADEQUL ISLAM1, G.K.MUSTAFIZURRAHMAN2, TAZUDDIN AHMED3, MD. MAHMUDUL HASAN4 and MD. ASHRAFUL ISLAM5
1Ph.D Student, Department of Soil Science, Hajee Mohammad Danesh Science and Technology University, Dinajpur, 2Professor, Department Soil Science, Bangabandhu Sheikh Mojibur Rahman Agriculture University, Salna, Gazipur, 3Zonal Manager, Apex Organic Soya Industries Limited, Rangpur Zone, Rangpur, 4Zonal Manager, Apex Organic Soya Industries Limited, Gobindogonj Zone, Gaibandha and 5Regional Specialist-Economic Development, Northern Bangladesh Region, World Vision, Rangpur, Bangladesh
ABSTRACT
Field experiment was conducted at the Farm, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh during December 2002 to July 2003 to assess the direct and residual effects of secondary nutrients (S and Mg), micronutrients (Zn, B and Mo) and organic amendments (PM and CD on wheat (cv. Kanchan) and succeeding mungbean (cv. Binamoog-2) crop. The experiment was laidout in a Randomized Complete Block Design (RCBD) with eight treatments, each having four replications. The treatments were as T1: Control, T2: S, T3: S + Mg, T4: S + Mg + Zn, T5: S + Mg + Zn + B, T6: S + Mg + Zn + B + Mo, T7: PM and T8: CD. The doses for nutrient elements and organic amendments were 80 kg N/ha, 20 kg P/ha, 30 kg K/ha, 20 kg S/ha, 15 kg Mg/ha, 5 kg Zn/ha, 2 kg B/ha, 1.5 kg Mo/ha, 5t PM/ha and 5t CD/ha as urea, TSP, MP, gypsum, magnesium oxide, zinc oxide, borax, ammonium molybdate, poultry manure and cowdung respectively. All the plots received an equal amount of N, P and K as basal application. The grain and straw yields of wheat were significantly influenced due to application of secondary nutrients, micronutrients and organic amendments. The plant height and spike length was also significantly affected by the treatments. The grain yield of wheat varied from 2,234 to 2,748 kg/ha. The treatment containing poultry manure resulted in 23% grain yield increase over control as against 20.6% grain yield increase due to cowdung and 14.1% grain yield increase for T6 treatment, which contained maximum nutrients. The straw yield of wheat was also significantly influenced by the treatment combinations. The added nutrients showed significant effect on grain and straw nutrient concentration viz. N, P, K, S, Mg, Zn and B, while the effect was not prominent on grain Mg and straw B concentration of wheat. The uptake of nutrients viz. N, P, K, S, Mg, Zn and B by the crop (wheat) was also influenced significantly by the treatments. The grain and stove yield, plant height, branches/plant, total pods/plant, seeds/pod of mungbean responded significantly to the residual effects of organic and inorganic fertilizers, which were applied to the previous crop (wheat). The residual effects of the treatments also significantly affected the nutrient uptake by mungbean (grain and stover). Secondary nutrients and micronutrients along with NPK fertilizers showed less response than those of organic amendments plus NPK fertilizers in wheat-mungbean cropping pattern. The overall results express that an application of organic amendments with NPK is essential to obtain satisfactory yield of wheat and the succeeding crop mungbean. The secondary nutrient viz. S and Mg and micronutrients viz. Zn, B and Mo application had an appreciable effect on the crops.
Keywords: Secondary and micro nutrients, Organic amendments, Wheat and Mungbean.