Author (s): Zayeda Akhter and A. K. M. Ruhul Amin, M. J. Ullah, Mirza Hasanuzzaman and M. Sultana
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 fertilizers
by using organic fertilizer (cowdung and compost) in wheat. The experiment
comprised ten treatments, such as T0: Control condition; T1:
All chemical fertilizers as recommended dose; T2: Cowdung as
recommended dose (10 t ha−1); T3: Compost as recommended
dose (10 t ha−1); T4: ½ Cowdung (5 t ha−1)+ ½
Compost (5 t ha−1); T5: Cowdung (10 t ha−1)+
Compost (10 t ha−1); T6: Cowdung (10 t ha−1) +
½ Chemical fertilizer; T7: Compost (10 t ha−1) + ½
Chemical fertilizer; T8: Cowdung (10 t ha−1) + Compost
(10 t ha−1) +½ Chemical fertilizer and T9: ½ Cowdung (5 t
ha−1)+ ½ Compost (5 t ha−1)+ ½ Chemical fertilizer. Among
the treatments using all chemical fertilizers as recommended dose (T1)
and cowdung + compost + ½ chemical fertilizer (T8) were found
superior considering all yield contributing characters and yield. Along the
growth stages (30 DAS – harvest), all the treatments except T0 showed identical
plant heights (84-95 cm). At 90 DAS and harvest significantly the maximum
number of tillers hill−1 was recorded from T1 and T8
(5.67-6.15), whereas the minimum number was found in T0 (3.94
and 3.72). Either the chemical fertilizer application or (T2) or its
combination with the inorganic fertilizers (T5-T9) showed
longer spikes (16.06-19.86 cm) and greater number of spikelets spikes−1
(17.5-20.33). All the treatments except T0 showed identical
1000-seed weight (43.42-49.06 g) and harvest index (36.92-39.35%).
Significantly the highest grain yields (3.38-3.71 t ha−1) were
obtained from T1 and T7-T9 whereas, the lowest
grain yield (2.06 t ha−1) was recorded from T0. Likewise,
significantly the higher biological yields were obtained from T1 and
T7-T9 (9.23-9.49 t
ha-1) and lowest from T0 (6.54 t ha−1).
Key words: Agronomic
management, Nutrient management, Organic farming, Yield attributes
J. Expt. Biosci. 4(1):1-8, January 2013
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