Growth analysis of short duration transplant Aus rice (Oryza sativa L. cv. Parija) under irrigated ecosystem

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during April to July 2012 to examine the effect of plant spacing and nitrogen level on the growth performance of short duration transplant Aus rice (cv. Parija) under irrigated ecosystem. The experiment comprised four plants spacings viz., 20 cm × 20 cm, 20 cm × 15 cm, 20 cm × 10 cm and 15 cm × 15 cm and four nitrogen levels viz. 0, 35, 70 and 105 kg N ha-1. The experiment was laid out in a Randomized Complete Block Design with three replications. Morpho-physiological characters, of transplant Aus rice (cv. Parija) significantly influenced by spacing of planting, nitrogen level and their interaction. At 60 DAT, the highest plant height (80.68 cm) was obtained at 20 cm × 15 cm spacing fertilized with 70 kg N ha-1 which was as good as 20 cm × 10 cm fertilizad with 35 kg N ha-1.  The maximum number of tillers hill-1 (15.16) was obtained at 20 cm × 20 cm spacing fertilized with 105 kg N ha-1which was statistically at par with 20 cm × 15 cmfertilized with 70 kg N ha-1.  The highest total dry matter (8.92g) was obtained at the 20 cm × 15 cm spacing fertilized with higher dose of nitrogen (105 kg N ha-1) and at 45-60 DAT, the highest crop growth rate (3.34) was obtained at 15 cm × 15 cm spacing fertilized with 35 kg N ha-1 while the lowest CGR (1.12) was recorded at the same spacing (15 cm × 15 cm) with control treatment. This study revealed that short duration transplant Aus rice cv. Parija can be cultivated at 20 cm × 15 cm or 15 cm × 15 cm spacing with 35 to 105 kg N ha-1 for proper growth

Effect of water and weed management in Boro rice (cv. BRRI dhan28) in Bangladesh

The experiment was conducted at the Farm of Farm Management Division, Bangladesh Agricultural University, Mymensingh during December 2012 to June 2013 to find out the effect of water and weed management in Boro rice (cv. BRRI dhan28). The experiment consisted of three irrigation systems viz., conventional flood irrigation, Alternate wetting and drying (AWD) and System of rice intensification (SRI) and four weed management practices viz., No weeding, hand weeding thrice at 20, 35 and 50 days after sowing, blade weeding + hand weeding once at 20 DAS; and pre-emergence herbicide (Panida 33 EC) @ 2.5 l ha-1 + hand weeding once at 20 DAS. Crop characters, yield components and yield were significantly influenced by water and weed managements, and their interaction. The highest plant height (91.51 cm), total tillers hill-1 (15.49), grains panicle-1 (86.87) and grain yield (4.02 t ha-1) were obtained in SRI method and corresponding lowest values were found in conventional flood irrigation while all parameters showed intermediate values in AWD. The highest plant height (93.45 cm), total tillers hill-1 (16.53), effective tillers hill-1 (12.88), grains panicle-1 (86.14), grain yield (5.47 t ha-1) and straw yield were found in pre-emergence herbicide (Panida 33 EC) @ 2.5 l ha-1 + one hand weeding at 20 DAS while all the parameters showed lowest values in weedy check. Weed infestation reduced 80.07% yield compared to application of pre-emergence herbicide (Panida 33 EC) @ 2.5 l ha-1 + one hand weeding at 20 DAS. In case of interaction, the highest total tillers hill-1 (20.93), grains panicle-1 (102.3) and grain yield (5.86 t ha-1) were found in SRI method with pre-emergence herbicide (Panida 33 EC) @ 2.5 l ha-1 + one hand weeding at 20 DAT while the lowest total tillers hill-1 (10.97), grains panicle-1 (61.46) and grain yield (0.91 t ha-1) were found in conventional flood irrigation having no weeding treatment. The above results concludes that SRI method with pre-emergence herbicide (Panida 33 EC) @ 2.5 l ha-1 + one hand weeding at 20 DAS appeared as the promising technique for appreciable grain yield of Boro rice (cv. BRRI dhan28)

Effects of plant spacing and nitrogen level on the green fodder yield of maize (Zea mays L.)

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during December 2016 to February 2017 to investigate the effect of plant spacing and nitrogen level on growth parameters and green fodder yield of maize (Zea mays L.). The experiment comprised three plant spacings viz., 35 cm × 10 cm, 35 cm × 20 cm, 35 cm × 30 cm and three nitrogen levels viz., 100, 150 and 200 kg N ha-1. The experiment was laid out in a randomized complete block design with three replications. Results revealed that plant spacing, nitrogen levels and their interaction had significant effect on growth parameters and green fodder yield. The tallest plant (192.5 cm) was obtained at plant spacing  35 cm × 30 cm, while the highest fodder yield (61.13 t ha -1) of Z. mays was recorded  at  35 cm × 10 cm spacing. In case of nitrogen level, the tallest plant (204.9 cm), the highest number of leaves plant -1 (12.22), the highest chlorophyll content in leaves (41.50) and the highest fodder yield (70.38 t ha -1) of Z. mays were recorded in 200 kg N ha-1. In case of interaction, the tallest plant (218.4 cm) of Z. mays was produced at spacing 35 cm × 30 cm along with 200 kg N ha-1. The highest fodder yield (78.01 t ha -1) of Z. mays was obtained at spacing 35 cm × 10 cm fertilized with 200 kg N ha-1 which was at par with spacing 35 cm × 20 cm fertilized with 200 kg N ha-1 and the lowest fodder yield (31.91 t ha -1) was obtained at spacing 35 cm × 30 cm along with 100 kg N ha-1. Therefore, spacing 35 cm × 10 cm fertilized with 200 kg N ha-1 appears as the promising practice for maize cultivation as fodder crop

Effect of plant spacing and integrated nutrient management on the yield performance of Binadhan-14

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from June to December 2014 with a view to finding out the effect of plant spacing and integrated nutrient management on the yield of Binadhan-14. The experiment consisted of three spacing viz., 25 cm × 15 cm, 20 cm × 20 cm and 20 cm × 15 cm and seven nutrient management viz., recommended dose of inorganic fertilizer @ 180-150-70-65-8 kg ha-1 of Urea-TSP-MoP-Gypsum-ZnSO4 respectively, cowdung @ 10 t ha-1, poultry manure @ 5 t ha-1,  50% recommended dose of inorganic fertilizer + cowdung @ 5 t ha-1, 50% recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha-1, 50% recommended dose of inorganic fertilizer + cowdung @ 10 t ha-1, 50% recommended dose of inorganic fertilizer + poultry manure @ 5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. Crop characters, yield components and yield of Binadhan-14 were significantly influenced by spacing, integrated nutrient management and their interaction. The highest number of effective tillers hill-1(6.81), 1000-grain weight (22.67 g) and grain yield (4.78 t ha-1) were recorded at the spacing 20 cm × 15 cm while in case of integrated nutrient management, the highest number of grains panicle-1 (64.47) was found with 50% recommended dose of inorganic fertilizer + cowdung @5 t ha-1, on the other hand, 1000- grain weight (22.91g), and grain yield (5.02 t ha-1) were found with 50% recommended dose of inorganic fertilizer +  poultry manure @ 5 t ha-1 while the lowest values  from  poultry manure @ 5 t ha-1. The highest grain (5.53 t ha-1) and straw (6.23 t ha-1) yields were found at the interaction of 20 cm × 15 cm spacing fertilized with 50% recommended dose of inorganic fertilizer + poultry manure @ 5 t ha-1. It can be concluded that short duration Binadhan-14 can be transplanted at the 20 cm × 15 cm spacing fertilized with 50% recommended dose of inorganic fertilizer + poultry manure @5 t ha-1 to obtain maximum grain yield

Growth, yield and quality of faba bean (Vicia faba L.) in response to sowing date and phosphorus fertilization

An experiment was carried out to study the effect of date of sowing and level of phosphorus on the yield, yield components and seed protein content of faba bean (Vicia faba L.) at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during November 2018 to March 2019 to study the influence of sowing date and phosphorous fertilization on the growth, yield and quality of faba bean (V. faba). Three date of sowing viz. 25 November, 5 December, 15 December and five levels of phosphorus viz., 0, 10, 20, 30, 40 kg P ha-1 were used in this experiment laid out in a randomized complete block design with three replications.  At 60 DAS, 25 November sowing fertilized with 40 kg P ha-1 showed significant influence on all characters except dry matter production. Early sowing on 25 November produced the tallest plant (42.95 cm), highest number of branches plant-1 (8.31), number of pods plant-1 (49.87), 1000-seed weight (97.55 g), seed yield (1.21 t ha-1), stover yield (1.98 t ha-1) and seed protein content (31.54%) while the corresponding lowest values were recorded from late sowing on  15 December. The crop fertilized with 40 kg P ha-1 produced the highest number of branches plant-1 (8.33), number of pods plant-1 (49.05), 1000-seed weight (97.40 g), seed yield (1.33 t ha-1), stover yield (2.28 t ha-1) and seed protein content (38.17%) while control treatment (0 kg P ha-1) produced the lowest values of all parameters. In case of interaction, the highest number of pods plant-1 (58.42), seed yield (1.59 t ha-1), stover yield (2.44 t ha-1) and protein content in seeds (39.60) were recorded with 25 November sowing fertilized with 40 kg P ha-1 whereas the lowest seed yield (0.54 t ha-1), stover yield (1.32 t ha-1) and seed protein content (25.90%) were obtained from 15 December sowing along with control treatment. Therefore, early sowing (25 November) with 40 kg P ha-1 appears as the promising combination for higher yield and seed protein content of faba bean

Influence of weeding regime on the performance of aromatic Boro rice (Oryza sativa L.)

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, from December 2013 to May 2014 to investigate the influence of weeding regime on the performance of aromatic Boro rice (cv. BRRI dhan50). The experiment comprised nine treatments viz., un-weeded, one hand weeding at 20 DAT + pre-emergence herbicide after hand weeding, two hand weeding at 20 and 40 DAT, pre-emergence herbicide followed by one hand weeding at 20 DAT, pre-emergence herbicide followed by one hand weeding at 40 DAT, post-emergence herbicide + one hand weeding at 40 DAT, pre-emergence herbicide + post-emergence herbicide, pre-emergence herbicide + post-emergence herbicide + one hand weeding at 40 DAT and weed free throughout the growth period. Panida (pendimethalin) @ 2.5 L ha-1 as pre-emergence herbicide and granite (penoxsulam) @ 93.70 ml ha-1 as post-emergence were used for weed control. The experiment was laid out in a randomized complete block design with four replications. Thirteen weed species belonging to seven families were observed in the experimental field. The highest weed density and dry weight were observed in no weeding condition compared to other treatments. The tallest plant, the highest number of total tillers hill-1, number of effective tillers hill-1, total spikelets panicle-1, grains panicle-1, 1000-grain weight, grain yield, straw yield, biological yield and harvest index were obtained from weed free treatment. The highest grain yield (5.92 t ha-1) was obtained from weed free throughout the growth period. Grain yield was reduced by 56.42% due to weed infestation in unweeded condition. The highest benefit-cost ratio (2.28) was obtained from application of pre-emergence herbicide followed by post-emergence herbicide + one hand weeding at 40 DAT. Therefore, weeding treatment pre-emergence herbicide followed by post-emergence herbicide + one hand weeding at 40 DAT may consider for cultivation of aromatic Boro rice (cv. BRRI dhan50)

Influence of plant nutrient management on the yield performance of transplant Aman rice (Oryza sativa L.)

The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, Bangladesh during June to December 2016 to investigate the influence of plant nutrient management on the yield performance of transplant Aman rice varieties. The experiment comprised four varieties viz., BRRIdhan70, BRRI dhan71, BRRI dhan72 and BRRIdhan73 and six nutrient managements viz. poultry manure 5 t ha-1, recommended dose of prilled urea, P, K, S, Zn (160, 65, 90, 70, 10 kg ha-1  of urea, TSP, MoP, Gypsum and Zinc sulphate, respectively), 75% of recommended dose of prilled urea and P, K, S, Zn + poultry manure 2.5 t ha-1, 50% of recommended dose of prilled urea and P, K, S, Zn + poultry manure 5 t ha-1, USG 1.8 g/4 hills and P, K, S, Zn recommended dose, USG 1.8 g/4 hills and P, K, S, Zn + poultry manure 2.5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. Number of total tillers hill-1 (10.25), number of effective tillers hill-1(8.85), grains panicle-1 (94.23), 1000-grain weight (27.81), grain yield (5.88 t ha-1) and straw yield (8.83 t ha-1) were found to be the highest in BRRI dhan72. Among the nutrient management, USG 1.8 g/4 hills and P, K, S, Zn + poultry manure 2.5 t ha-1 exhibited its superiority  to other treatments in terms of plant height (131.0 cm), number of total tillers hill-1 (10.67), number of effective tillers hill-1 (9.13), grains panicle-1 (92.71), 1000-grain weight (26.82), grain yield (6.0 t ha-1) and straw yield (8.35 t ha-1). The highest grain yield (6.45 t ha-1) was found in BRRI dhan72 combined with USG 1.8 g/4 hills and P, K, S, Zn + poultry manure 2.5 t ha-1 and the lowest grain yield (4.85 t ha-1) was found in BRRI dhan71 fertilized with poultry manure 5 t ha-1. From the study, it can be concluded that transplant Aman rice cv. BRRI dhan72 fertilized with USG 1.8 g/4 hills and P, K, S, Zn + poultry manure 2.5 t ha-1 appears as the promising practice to obtain the highest grain yield

Growth performance of aromatic Boro rice (Oryza sativa L. cv. BRRI dhan50) as influenced by date of transplanting and nutrient management

The present experiment  was  conducted  at  the  Agronomy  Field  Laboratory,  Bangladesh Agricultural  University,  Mymensingh,  during  December  2015  to May  2016 to find out the effect of transplanting date and nutrient management on the growth performance of aromatic Boro rice (cv. BRRI dhan50). The experiment comprised five dates of transplanting viz. 15 December, 30 December, 15  January; 30  January and 15  February, and four nutrient managements viz., recommended dose of inorganic fertilizer (N, P, K, S and Zn @ 115, 25, 60, 18, 3.5  kg ha-1,  respectively),  poultry manure @ 5 t ha-1, 25% less than recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha-1, 50% less than recommended dose of inorganic fertilizer + poultry manure @ 2.5 t ha-1. The experiment was laid out in a randomized complete block design with three replications. Morpho-physiological characteristics were significantly influenced by date of transplanting, nutrient management and their interactions. The highest plant height (71.41 cm) was recorded in early transplanting (15 December) and the lowest plant height (66.29 cm) was recorded when transplanted on 15 February. At 75 DAT, the tallest plant (72.79 cm), the highest number of tillers hill–1 (15.13) and LAI (2.78) were obtained in 25% less than recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1 and the shortest plant (66.63 cm) and lowest  number of tillers hill–1 (11.13) were recorded when applied only poultry manure @ 5 t ha-1. The highest dry matter production hill–1 (31.18 g) at 75 DAT was obtained when the crop was transplanted on 15 December and fertilized with 25% less than recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1.  Therefore, aromatic Boro rice (cv. BRRI dhan50) can be transplanted on 15 December fertilized with 25% less than recommended dose of inorganic fertilizers + poultry manure @ 2.5 t ha-1 for appreciable growth performance

Growth analysis of short duration transplanted Aus rice (cv. Parija) under three agronomic practices

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh to investigate the growth of short duration transplanted Aus rice (cv. Parija) under three agronomic practices. The study comprised of two nursery seeding densities viz. 40 and 80 g seeds m-2, three ages of seedlings viz. 20, 30 and 40-day old, and three levels of seedlings hill-1 viz. 2, 4 and 6 seedlings hill-1. The experiment was laid out in a Randomized Complete Block Design with three replications. For individual treatment effects, the highest plant height, number of tillers hill-1, total dry matter, leaf area index and crop growth rate were found when seedlings were raised @ 40g seed m-2 and 30-day old seedlings were transplanted @4 seedlings hill-1. In interaction, the highest number of tillers hill-1 (13.00) and total dry matter (22.93 g) at 45 DAT, and crop growth rate (6.71 g m-2 day-1) at 15-30 DAT were obtained from the interaction among 40 g seed m-2 × 30-day old seedlings × 4 seedlings hill-1. On the other hand, the tallest plant (73.27 cm) at 45 DAT was found from the interaction among 80 g seed m-2 × 30-day old seedlings × 4 seedlings hill-1, while the highest leaf area index (2.87) was recorded from the interaction of 40 g seed m-2 × 30-day old seedlings × 2 seedlings hill-1 at 50 DAT. Considering both the significant individual and interaction treatment effects on the growth parameters, the use of 40 g seed m-2 × 30-day old seedlings × 4 seedlings hill-1 could improve the growth performance of short duration transplanted Aus rice (cv. Parija). Therefore, a nursery seeding density of 40 g seed m-2 and 30-day old seedlings transplanting with 4 seedlings hill-1 appears as the promising combination in respect of growth performance of short duration transplanted Aus rice (cv. Parija)

Assessing the influence of integrated nutrient management on growth performance of aromatic fine rice

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during July 2017 to December 2017 to study the combined effect of vermicompost with inorganic fertilizers on the growth attributes of aromatic fine rice varieties. The experiment comprised three varieties viz. BRRI dhan34, Binadhan-13 and Kalizira, and five nutrient managements viz. Control (no application of manures and fertilizer), Recommended dose of inorganic fertilizers ( i.e. 150, 95, 70, 60, 12 kg ha-1 of Urea, TSP, MOP, Gypsum and Zinc Sulphate, respectively), vermicompost @ 3 t ha-1, 25% less than recommended dose of inorganic fertilizer + vermicompost @ 1.5 t ha-1, 50 % less than recommended dose of inorganic fertilizer + vermicompost @ 3 t   ha-1. The experiment was laid out in a randomized complete block design with three replications. Growth characters of aromatic fine rice were significantly influenced by variety, nutrient management and interaction of variety and nutrient management. In case of variety, the highest number of total tillers hill-1 leaf area index, total dry matter production and chlrophyll content were obtained from Binadhan-13 at all sampling dates. While, Kalizira produced the lowest number of total tillers hill-1, total dry matter, leaf area index and chlorophyll content except plant height at all sampling dates. In case of nutrient management, the tallest plant, the highest number of total tillers hill-1, total dry matter production, leaf area index and chlrophyll content were obtained from 50 % less than recommended dose of inorganic fertilizer + vermicompost @ 3 t ha-1 at all sampling dates. But the shortest plant, the lowest number of total tillers hill-1, leaf area index, total dry matter production, crop growth rate and chlorophyll content were found in control (no manures and fertilizers) at all sampling dates. In case of interaction of variety and nutrient management, the highest number of total tillers hill-1, leaf area index, total dry matter production and chlorophyll content were found in Binadhan-13 along with 50 % less than recommended dose of inorganic fertilizer + vermicompost @ 3 t ha-1 at all sampling dates. So, it can be concluded that Binadhan-13 along with 50% less than the recommended dose of inorganic fertilizers + vermicompost @ 3 t ha-1 combination might be a promising practice for aromatic fine rice cultivation