EFFECT OF SOWING DATE ON PHENOLOGY, GROWTH AND YIELD OF LENTIL GENOTYPES

Author (s): S. Akther, F. Ahmed, M. A. Hossen, B. Ahmed and M. A. Hossain

 Abstract 

A field experiment was conducted during rabi seasons of 2010-2011 to evaluate sowing dates effect on phenology, growth and yield of lentil genotypes. Fourteen genotypes (T₁ = BLX-01012-7, T₂ = BLX-01014-9, T₃ = BLX-99033-14, T₄ = BLX-9903-11, T₅ = ILI-5143, T₆ = BLX-01013-1, T₇ = BLX-99033-19,  T₈= X-95-3-167(4), T₉ = BLX-98001-1, T₁₀ = BLX-98002-3, T₁₁ = BARI Mosur-3, T₁₂ = BARI Mosur-4, T₁₃ = BARI Mosur-5, T₁₄ = BARI Mosur-6) were tested at four sowing dates (November 10, November 25, December 10 and December 25) in the present study. Sowing dates greatly influenced vegetative (emergence to first flowering time) and reproductive growth stages (flowering to pod maturity time) as well as crop maturity. In November 10 sown crop first flower was observed at 48 days after sowing (DAS) in most of the genotypes while that was around 50 DAS in November 25 sown crop. Beyond November 25 sowing, flowering was enhanced and as a result December 10 sown crop took about 47 days to first flower while December 25 sown crop took only 45 days. Crop maturity was enhanced with delay sowing. November 10 sown crop was harvested within 116-118 DAS while November 25 sown within 102-103 DAS. December 10 and December 25 sown crop took 92-94 DAS and 80-90 DAS, respectively to become mature. Almost all of the genotypes performed well at November 10 and November 25 sowing might be due to favorable temperatures (min.9.50 to 10.0 ^oC and max. 20.0 to 24.0 ^oC) prevailed at flowering and pod development stages. The higher seed yield 2167 kg ha^-1 was recorded in T₁₁ (BARI Mosur-3) at November 10 and lower yield 417 kg ha^-1 in T₂ (BLX-01014-9) at December 25 sowing. However, irrespective of sowing dates T₃ (BLX-99033-14), T₇ (BLX-99033-19), T₁₀ (BLX-98002-3) and T₁₁ (BARI Mosur-3) performed well.

Kew words: Sowing date, phenology, lentil   and yield

J. Expt. Biosci. 4(1):1-8, January 2013

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GROWTH AND YIELD OF WHEAT AS INFLUENCED BY CHEMICAL AND ORGANIC FERTILIZERS

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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GROWTH AND YIELD PERFORMANCE OF STRAWBERRY GERMPLASM AT SHER-E-BANGLA AGRICULTURAL UNIVERSITY

Author (s): M.J. Hossan, M.S. Islam, M.K. Ahsan, H. Mehraj and A.F.M. Jamal Uddin

 Abstract 

An experiment was conducted at the Horticulture Farm, Sher-e-Bangla Agricultural University, Dhaka during the period from October, 2010 to April, 2011 to evaluate growth and yield performance of three strawberry germplasms. The experiment consisted of three germplasms viz. SG-1, RABI-3 and SG-3. Results showed that the tallest plant (28.0 cm), maximum number of leaves (11.0 plant^-1) and maximum leaf area 69.8 cm² plant^-1) was recorded from SG-1. Maximum number of fruits (26.0 plant^-1), average fruit weight (14.6 g) and maximum yield (379.8 g plant^-1) was also found in SG-1 whereas the minimum values each of the above said variables were recorded in RABI-3. Brix percentage was also found higher in SG-1 germplasm.

Key words: Strawberry germplasm, Fragaria × ananassa and  Brix. 

J. Expt. Biosci. 4(1):1-8, January 2013

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