Year 2010

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WEED CONTROL AND YIELD OF WHEAT AS AFFECTED BY BRASSICA ALLELOPATHY
(DEPARTMENT OF AGRONOMY, 2010-06) RAHMAN, ANISUR
The experiment was conducted at the Agronomy research field, Sher-e-Bangla Agricultural University, Dhaka from November, 2008 to March, 2009 to find out the allelopathic effect of Brassica biomass on weed control and yield of wheat. The treatment of the experiment consisted of 2 levels of field status viz. fallow land (C ) and field with Brassica (C 2 ); 2 levels of maturity viz. 25 days old Brassica (M ) and 35 days old Brassica (M ); and 3 levels of Brassica biomass amount viz. 0 kg biomass m -2 (B 1 2 ), 0.5 kg biomass m -2 (B 2 ) and 1.0 kg biomass m -2 (B ). Maximum weed population at 30 DAS (165 m -2 ) and at 60 DAS (291 m -2 ), dry wt. of weeds at 30 DAS was found in the plots having no biomass. The highest dry weight of weed at 60 DAS was found for the field status from fallow land (107.77 gm ), 25 days old Brassica (78.80 gm -2 ) & 0 kg biomass application (89.94 gm -2 ). The highest grain yield was found from Brassica fields (2.68 t ha -1 ), 35 days old Brassica biomass (2.59 t ha -1 ) & 1.0 kg biomass application (2.71 t ha -1 ). The interaction effect of field status and Brassica biomass concentration showed significant result on weed population (80.33 m -2 ), dry weight of weed (39.74 g m -2 ), plant height (33.98 cm), number of effective tillers linear m -1 (84.67), spike length (16.09 cm), number of filled grain spike -1 (50.93), number of leaves plant -1 (10.53), weight of 1000 grains (41.22 g), grain yield (2.83 t ha -1 ) and straw yield (4.08 t ha -1 ).The lowest weed population (124.0 m -2 ) and dry weight of weed (39.11 gm -2 ) at 60 DAS was found from the field with Brassica field and 25 days old biomass @ 1.0 kg m -2 . The highest thousand grain weight (41.84 g) was found from the field with 35 days old Brassica application @ 0.50 kgm -2 . The maximum grain yield (2.86 t ha -1 ) was found from the field with 35 days old Brassica biomass application @ 1.0 kgm -2 . Weed population and weed dry weight showed highest result in fallow land with no biomass application. Fallow land, less matured biomass and no biomass application and their interaction encouraged growth of weed and dry weight of weed that means Brassica biomass reduced weed growth in all cases of application. Weed control was quite positive with Brassica biomass. On the other hand, land with Brassica and application of 35 days old Brassica biomass @ 0.5 -1.0 kg m -2 increased yield contributing characters and yield of wheat. -2 3 1 1
EFFECT OF WEEDING FREQUENCY AND POPULATION DENSITY ON THE GROWTH AND YIELD OF SESAME
(DEPARTMENT OF AGRONOMY, 2010-06) AHMMAD, ALI
Abstract The experiment was conducted at the Agronomy farm of Sher-e-Bangla Agricultural University to evaluate the effect of four weeding frequencies(W 1 =control, W =10, W 3 =20 and W 4 =30 days after emergence) and population densities (P =66666, P 2 =33333, P 3 =22222 and P =16666 plants/ha) on the growth and yield attributes of sesame. Weeding frequencies resulted in the increase on growth and yield attributes of sesame. The highest plant height (127.10 cm), number of branches/plant (6.33 cm) and dry weight/plant (23.63g) were obtained with 3 times weeding (10, 20 and 30 days after emergence respectively). Number of effective capsule/plant (109.60), 1000- seeds weight (3.19g), grain yield (0.98 t/ha) and harvest index (25.16%) were also found with same weeding treatment in this study. The highest plant height (136.90 cm) was recorded from the combined effect of 33333 plants/ha and three times weeding at 10, 20 and 30 days after emergence (DAE) and weeding at 10, 20 and 30 days after emergence (DAE). Weed infestation also affected the lowest plant height (109.50 cm) was found from 22222 plants/ha 4 with no weeding. But the combined effect of 16666 plants/ha with three times weeding at 10, 20 and 30 days after emergence(DAE) revealed the highest number of leaves/plant (31.80), number of branches/plant (8.30) and dry weight/plant (26.93 g). On the other hand, the highest number of effective capsule/plant (146.8), number of seeds/capsule (79.20) and 1000- seed weight (3.86g) were found with the interaction effect of 16666 plants/ha with three times on growth, yield and yield contributing characters of the crop. The highest weed significantly biomass (152.1 g/6m 2 ) was observed from 16666 plants/ha with three times weeding at 10, 20 and 30 days after emergence(DAE) whereas the lowest figure was (27.55 g/6m 2 ) recorded from the plots treated with 666666 plants/ha with 1 2 one weeding at 10 days after emergence(DAE). However, the results revealed that the plots, with highest plant population weeded once, caused lower weed densities. As such, the combined treatments of 66666 plants/ha with one weeding at 10 days after emergence showed the lowest infestation, as evaluated by the lowest weed dry weight (27.55 g/6m 2 ), in compare to that of the highest (65.17 g/6m 2 ) with 16666 plants/ha and three times weeding at 10, 20 and 30 days after emergence(DAE).
GROWTH AND YIELD OF HYBRID AND INBRED BORO RICE AFFECTED BY DIFFERENT WEED CONTROL METHODS
(DEPARTMENT OF AGRONOMY, 2010-06) AHAMED, SHAMIM
A field experiment was carried out at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from December, 2008 to May, 2009 to evaluate the Growth and yield of hybrid and inbred boro rice affected by different weed control methods. The experiment comprised of seven weeding treatments viz. no weeding, one weeding at 30 DAT (Days after transplanting), two weeding at 30 DAT and 50 DAT, application of herbicides: Sunrise 150WP recommended dose at 100g ha-1, Sunrise 150 WP 25% higher than the recommended dose, Commit 500EC recommended dose at 1000ml ha-1, Commit 500EC 25% lower than the recommended dose; boro rice varieties viz. Hira-6(hybrid), Sonarbangla-6(hybrid) and BRRI dhan29(inbred). The experiment was carried out in RCBD with three replications. Eight weed species belonging to four families were identified in the experimental field of which Echinochloa colonum, Leersia hexandra, Cynodon dactylon, Cyperus rotundus, Scirpus mucronatus, Spilanthes acmella, Enhydra fluctuans and Desmodium trifolium. Population density of weeds was recorded from 7 DAT to 50 DAT at 7 days interval. It was evident that among the weed control treatments, application of Sunrise 150 WP 25% higher than the recommended dose showed best performance in respect of the highest plant height (103.35cm), maximum tillers hill-1 (22.00), the maximum plant dry matter (192.8g hill-1), effective tillers hill-1(20.34), lowest number of ineffective tiller hill-1(1.33) and consequently produced highest grain yield (9.50 t ha-1), straw yield (10.25 t ha-1) and harvest index (41.16) in comparison all other treatments. Among the weed control treatments, Sunrise 150WP at 25% higher than the recommended dose control 81% weed population, where as Commit 500EC 55% and hand weeding only 52% which was costlier than others. The highest grain yield, straw yield as well as benefit cost ratio was obtained from the variety Sonarbangla-6(hybrid). Application of Sunrise 150 WP 25% higher than the recommended dose increased 22.63% higher grain yield than Commit 500EC 25% lower than the recommended dose and 34.9% higher grain yield than two hand weeding due to higher number of panicles hill-1 and higher number grains panicle-1.
INFLUENCE OF APPLICATION METHOD OF NITROGEN ON THE GROWTH AND YIELD OF MUSTARD
(DEPARTMENT OF AGRONOMY, 2010-06) JABIN, UMME
The field experiment was conducted at the agronomy field of Sher-e-Bangla agricultural university, Dhaka during the rabi season (November- February) 2009-2010 to study the influence of application method of nitrogen (N) on the growth and yield of mustard. The experiment was laid out in randomized complete block design (RCBD) with three replications. Two forms of nitrogen fertilizer i.e. prilled urea (PU) and urea super granule (USG) were used in this experiment with different application methods. The treatments were i.e. T1= Prilled Urea (PU) broadcasted (conventional method), T2= PU given in the side furrows, T3= PU given between two rows, T4=PU and seed given in the same furrows, T5= Urea Super Granular (USG) placed at 5 cm depth as basal, T6= USG placed at 5 cm depth at 10 days after sowing (DAS), T7= USG placed at 5 cm depth at 20 DAS, T8= USG placed at 5 cm depth at 30 DAS, T9= USG placed at 10 cm depth as basal, T10= USG placed at 10 cm depth at 10 DAS, T11= USG placed at 10 cm depth at 20 DAS, T12= USG placed at 10 cm depth at 30 DAS, T13= USG placed at 15 cm depth as basal, T14= USG placed at 15 cm depth at 10 DAS, T15= USG placed at 15 cm depth at 20 DAS and T16= USG placed at 15 cm depth at 30 DAS. Results showed that USG placed in 5 cm depth at 20 DAS gave the highest seed yield (3.59 t ha-1) along with all the higher yield components i.e. siliquae plant-1 (58.60), seeds siliqua-1 (32.00), 1000 seed weight (3.56 g) which reflected in higher value of biological yield (6.78 t ha-1) and harvest index (52.62%). On the other hand, PU (conventional method) gave seed yield (2.58 t ha-1) attributed to lower value of yield components i.e. siliquae plant-1 (44.15), seeds siliqua-1 (31.66), 1000 seed weight (3.30 g) with minimum biological yield (6.65t ha-1) and harvest index (37.03). In contrast, the highest stover yield (4.07 t ha-1) was found in conventional (broadcasting) use of PU. The use of USG out yielded PU by 39.14% when this method required about 52.38% less urea than the amount of PU. Therefore, use of USG had two fold advantages over conventional use of PU.
FEASIBILITY OF REPLACING CHEMICAL FERTILIZER BY USING ORGANIC FERTILIZER IN WHEAT (Triticum aestivum)
(DEPARTMENT OF AGRONOMY, 2010-06) AKHTER, ZAYEDA
The 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. Data on different growth characters and yield were recorded. Among the treatments all chemical fertilizers as recommended dose (T1) and cowdung + compost + ½ chemical fertilizer (T8) were found superior considering all yield contributing characters and yield. The treatments T7 (compost + ½ chemical fertilizer) and T9 (½ cowdung + ½ compost + ½ chemical fertilizer) also showed statistically similar results in respect of grain yield and most of the yield contributing characters. So, it is possible to reduce the use of chemical fertilizers by combined use of organic and chemical fertilizers without significant yield loss in wheat.
PERFORMANCE OF FOUR MUNGBEAN CULTIVARS UNDER DIFFERENT SOWING DATE IN KHARIF II SEASON
(DEPARTMENT OF AGRONOMY, 2010-12) SUKHI, SHEFATH JAHAN
A field experiment was conducted at the Sher-e-Bangla Agricultural University farm, Dhaka, Bangladesh during the period from August, 2010 to February 2011to evaluate the performance of four mungbean cultivars under different sowing date on kharif II season. The experiment comprised four mungbean cultivars viz., BARI mung-3, BARI mung-4, BARI mung-5 and BINA mung-2, and four sowing dates viz., 23 August, 23 September, 23 October and 23 November. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Results showed that cultivar and sowing date significantly influenced all the parameters studied. Plant height, number of branches per plant, number of pods per plant, pod length, seed and stover yield were found highest in BINA mung-2 and lowest in BARI mung-3, while these parameters were found highest and lowest on sowing 23 October and 23 November, respectively. Sowing BINA mung-2 on 23 October and 23 November gave the highest seed yield (2.60 t/ha) and stover yield (3.42 t/ha) and the lowest seed yield (1.80 t/ha) and stover yield (1.87 t/ha), respectively. Results suggested that sowing all the four cultivars studied on 23 October is desirable for higher seed yield under AEZ 28 condition.
PERFORMANCE OF MAIZE MUNGBEAN INTERCROPPING GROWN UNDER DIFFERENT PLANTING GEOMETRY
(DEPARTMENT OF AGRONOMY, 2010-12) TOHURA, TOSNIA
A field experiment was carried out at Sher-e-Bangla Agricultural University farm to study the effect of intercropping summer mungbean with maize on the fodder and grain yield productivity under different planting geometry. There are fourteen (14) treatments were used for the present study viz. (i) T1 = MPR + 4 MuR using MPR spacing = 37.5 cm, distance between adjacent MPR = 112.5 cm, Inter-MuR spacing = 30 cm, (ii) T2 = MPR + 4 MuR using MPR spacing = 30 cm, distance between adjacent MPR = 100 cm, Inter-MuR to MuR = 25 cm, (iii) T3 = MPR + 3 MuR using MPR spacing = 30 cm, distance between adjacent MPR = 100 cm, Inter-MuR to MuR = 30 cm, (iv) T4 = MPR + 3 MuR using MPR spacing = 25 cm, distance between adjacent MPR = 85 cm, Inter-MuR to MuR = 30 cm, (v) T5 = MPR + 3 MuR using MPR spacing = 25 cm, distance between adjacent MPR = 75 cm, Inter-MuR to MuR = 20 cm, (vi) T6 = MPR + 4 MuR using MPR spacing = 25 cm, distance between adjacent MPR = 85 cm, Inter-MuR to MuR = 17 cm, (vii) T7 = MPR + 4 MuR using MPR spacing = 37.5 cm, distance between adjacent MPR = 112.5 cm, Inter-MuR to MuR = 25 cm, (viii) T8 = MPR + 4 MuR using MPR spacing = 30 cm, distance between adjacent MPR = 100 cm, Inter-MuR to MuR = 20 cm, (ix) T9 = MPR + 3 MuR using MPR spacing = 30 cm, distance between adjacent MPR = 100 cm, Inter-MuR to MuR = 25 cm (x) T10 = MPR + 3 MuR using MPR spacing = 25 cm, distance between adjacent MPR = 85 cm, Inter-MuR to MuR = 25 cm, (xi) T11 = MPR + 2 MuR using MPR spacing = 25 cm, distance between adjacent MPR = 85 cm, Inter-MuR to MuR = 25 cm, (xii) T12 = MPR + 3 MuR using MPR spacing = 25 cm, distance between adjacent MPR = 85 cm, Inter-MuR to MuR = 17 cm, (xiii) T13 = Sole Maize (Row to row spacing = 75 cm) and (xiv) T14 = Sole Mungbean (Row to row spacing = 30 cm) where MPR = Maize Paired Row and MuR = Mungbean Row. In the intercropping treatments, maize was grown in paired row using varying spacing of 25-37.5 cm leaving inter-paired-rows space of 85-112.5 cm for sowing mungbean (2-4 rows). Results showed that both the sole maize and mungbean gave the highest per plant values in most of the plant parameters studied. The treatments did not show appreciable difference in plant height, number of leaves/plant and leaf area/plant of maize due to the varying row arrangements. Maize fresh weight/ha and mungbean seed yield/ha decreased drastically by 33 - 56% and 50- 81%, respectively. Among the intercropping treatments ‘4 row-mungbean 25 cm apart accommodated at the space of 112.5 cm left between maize paired rows’ showed higher per plant maize fodder yield. But significantly higher fodder yield and dry weight of maize per hectare was found in sole maize. The sole maize showed significantly the highest values of yield and yield attributes. Among the intercropping treatments with 25 cm - apart maize paired rows leaving 85 cm space between paired rows accommodated with 2-3 rows of 25 cm apart – mungbean (T10) gave comparatively higher values of yield and yield parameters of maize. The sole mungbean showed significantly the highest values of fodder and grain yield and also those of yield attributes. The highest net return, maize equivalent yield, LER and BCR were Tk.69615, 7307.67 Kg/ha, 1.43 and 2.74 respectively with the same treatment. However, the intercropping treatments showed inconsistent results in respect of growth, fodder and yield attributes.
RESPONSE OF MUSTARD VARITIES TO DIFFERENT NITROGEN MANAGEMENT
(DEPARTMENT OF AGRONOMY, 2010-12) AKTER, ROJINA
The experiment was carried out at the research field of Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka during the period from November 6, 2009 to February 10, 2010 to asses the comparative advantages of using urea super granule (USG) over prilled urea and also the effect of different management of nitrogenous fertilizer on growth, yield and yield attributing characters of mustard. Four nitrogen Treatment (T = Normal urea, T 2 = USG as basal, T 3 = USG at 15 DAS and T 4 1 = USG at 25 DAS) and three mustard varieties (BARI Sarisha-11, BARI Sarisha-13 and BARI Sarisha-14) were used as treatment variables in the experiment. The experiment was laid out in a split plot design with 3 replications. Results indicate that the plant growth characters, yield and yield attributes of the cultivars were significantly influenced by USG application. Plant height, number of branches plant , number of leaves plant -1 , leaf area plant -1 , total dry matter, number of siliqua plant -1 , siliqua length, number of seed siliqua-1, 1000-seed weight, and seed yield (t ha -1 ) were found highest when USG was applied as basal dose and all the characters showed lowest value when USG was applied at 25 DAS. Highest number of siliqua per plant (654.7) and yield (2.06 t ha -1 ) was obtained in BARI Sarisha 11 when USG was used as basal dose which reduce 40% use off prilled and 20% of total cost in mustard cultivation.
PERFORMANCE OF LENTIL VARIETIES AS INFLUENCED BY IRRIGATION LEVELS
(DEPARTMENT OF AGRONOMY, 2010-12) ZAKARIA, RAZIB MOHAMMAD
The present study was conducted at the research field of the Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka during the period from November, 2010 to February, 2011 to evaluate performance of lentil varieties as influenced by irrigation levels. The treatment variables were three varieties (V : BARI mosur 4, V 2 : BARI mosur 5 and V : BARI mosur 6) and four irrigation levels (I 0 : no irrigation, I v : irrigation at 25 DAS, I 3 f : irrigation at 50 DAS and I : irrigatation at both 25 and 50 DAS). The experiment was laid-out in a randomized complete block design (RCBD) (factional) with three replications. Results of the study were recorded on plant height, branches plant -1 , leaves plant -1 , pods plant , plant dry weight, 1000-seed weight, seed yield, stover yield, biological yield and harvest index and were found significantly variable with irrigation levels. Individually, BARI mosur 6 and irrigation at both 25 and 50 DAS, showed the best performance on growth and yield of lentil. Combined effect also showed significant effect on all parameters of the study. BARI mosur 6 along with irrigation at both vegetative and productive stage produced the highest 1000-seed weight (24.33 g), seed yield (1967.17 kg ha -1 ) and biological yield (4467.13 kg ha -1 ). From the results it is suggested that BARI mosur 6 with irrigation at both vegetative and reproductive stages may give optimum yield. -1 vf , seeds pod 1 -1
RESPONSE OF LENTIL TO DIFFERENT LEVELS OF NITROGEN AND PHOSPHOROUS
(DEPARTMENT OF AGRONOMY, 2010-06) SARKER, MD. SADIQUZZAMAN
An experiment was conducted at the Agronomy field of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka during the period from October 2008 to March 2009 to evaluate the response of lentil (BARI masur-6) to different levels of nitrogen and phosphorous. The experiment comprised four levels of nitrogen viz N 0 (0 kg N ha -1 ), N 1 (10 kg N ha -1 ), N 2 (20 kg N ha ) and N 3 (30 kg N ha -1 ) and four levels of phosphorus viz. P 0 (0 kg P (20 kg P 2 O 5 ha -1 ), P 2 (40 kg P 2 O 5 ha -1 ) and P 3 (60 kg P 2 O 5 ha -1 2 ). The experiment was laid out in a Randomized Complete Block Design (factorial) with three replications. The data recorded from the experiment revealed that the tallest plant, the highest branches plant -1 and dry weight plant -1 were recorded from (20 kg N ha -1 (N 2 ). The highest pods plant -1 , 1000 grain weight, grain yield (1768.00 kg ha -1 ) and stover yield (3301 kg ha -1 O 5 ha -1 ) were also found from 20 kg N ha . Regarding phosphorus effect it revealed that the highest value of growth, yield and yield contributing parameters all were obtained from the application of 40 kg P 2 O 5 ha -1 . The respective highest values obtained from phosphorus application at 40 kg P 2 O 5 ha -1 were 28.38 cm, 12.99, 10.17g, 109.60, 21.20 g, 1695.00 kg ha -1 and 3217.75 kg ha -1 for plant height, branches plant , dry weight plant -1 , pods plant -1 , 1000 grain weight, grain yield (kg ha -1 ) and stover yield. In interaction effect, it was observed that N 2 P 2 (20 kg N ha -1 -1 × 40 kg P ) showed the highest grain yield as 2145.00 kg ha -1 and stover yield as 3545.00 kg ha -1 . The control treatment either as individual or interaction had the lowest -1 ), P 2 O 5 1 ha -1 -1 performance in respect of growth, yield attributes and yield of the crop.

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