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[1] Assessment of some exotic potato accessions/cultivars for their yield performance under Bangladesh condition

Md. Murad Hossan Chowdhury, Md. Amirul Islam, Md. Habibur Rahman, Md. Abdur Rahim, Md. Atikuzzamman, Maria Akter Sathi

doi: 10.5455/faa.59383

Abstract

A field research was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period between November 2011 and February 2012 to determine the yield performance of some exotic potato accessions/cultivars. The experiment was laid out in randomized complete block design (RCBD) with three replications. The experiment comprised of six (6) different exotic potato accessions viz. i) AC10064, ii) AC10076, iii) AC10097, iv) AC10109, v) AC10123, vi) AC10190 and one cultivar Cardinal as control. Various data were recorded on yield and different yield contributing characters. The lowest days required for plant emergence at accession AC10109 (6.25) and the maximum days required at variety Cardinal (10.02). The highest tuber length (7.11 cm) and diameter (5.70 cm) were found in the accession AC10109 and lowest length (5.85 cm) and diameter (3.81 cm) of tubers were found in the variety Cardinal. The maximum (274.74 g) and the minimum (130.11 g) yield of tubers per hill were found in accession AC10109 and Cardinal, respectively. The maximum yield of tubers per hectare was obtained from the accession AC10109 (29.31 t/ha) closely followed by AC10064 (28.88 t/ha) and the minimum yield of tubers was obtained from the accession Cardinal followed by AC10190 (15.97 t/ha). Considering the yield performance, potato accession AC10109 was the best performer followed by AC10064 and performed better than popular existing variety Cardinal, therefore these two accessions may be considered for further multi-location trial before final recommendation.

Keywords: Potato, accession, growth, yield


[2] Response of strip-planted wheat varieties to pendimethalin

Taslima Zahan, Md. Moshiur Rahman, Mahfuza Begum, Md. Enamul Haque, Richard W. Bell

doi:10.5455/faa.56921

Abstract

The study was initiated with the aims to determine the variation in growth and yield of winter wheat varieties to pendimethalin at different application rates and to identify the wheat varieties tolerant or susceptible to pendimethalin. A two-year study was conducted on sandy clay loam textured soil containing low organic matter content during the dry season having no or very little amount of rainfall. Eight wheat varieties (BARI Gom 21 to 28) were tested against pendimethalin 33EC applied at its label rate (3 L ha-1), double (6 L ha-1) and three times of the label rate (9 L ha-1). Emergence of all wheat varieties was not adversely affected by pendimethalin even applied at three times higher than the label rate; however, plant heights of BARI Gom 23 and BARI Gom 25 were slightly decreased with increasing application rate. Label rate application of pendimethalin did not decrease the yields of all wheat varieties compared to the control, but BARI Gom 21, BARI Gom 22, BARI Gom 24, BARI Gom 26 and BARI Gom 27 gave their best yields at three times higher of the label rate application. Therefore, the study marked out BARI Gom 21, BARI Gom 22, BARI Gom 24, BARI Gom 26 and BARI Gom 27 as the pendimethalin-tolerant wheat varieties under strip planting system. Additionally, the study confirmed that all the wheat varieties were tolerant to label rate application of pendimethalin; however, BARI Gom 23, BARI Gom 25 and BARI Gom 28 were susceptible to the higher rate of pendimethalin.

Keywords: Herbicide; minimum tillage; plant growth; tolerance; wheat


[3] Current research status of allelopathy of plants grown in Bangladesh

Hisashi Kato-Noguchi

doi:10.5455/faa.73168

Abstract

Allelopathy is probably involved in all aspects of natural ecosystems such as competition and succession of plant communities. Much of research in allelopathy mentioned that allelopathy can be used to control weeds and to reduce synthetic chemical input into agriculture practices. Several important papers describing allelopathy and allelopathic active substances in plants in Bangladesh have published in the last decay. Hundreds of plant species including about 150 rice cultivars in Bangladesh were evaluated their allelopathic potential. Dozens of allelopathic active substances including novel compounds were also isolated from those plant species. Concept of allelopathy is very important to developed sustainable agriculture setting in organic farming. Some of the information in allelopathy have the potential for use in understanding and controlling weeds in agriculture.

Keywords: Allelopathy, Bangladesh, Phytotoxicity, Weed management


[4] Kinetics of air drying of jackfruit and mango pulp and development of mixed leather

Md. Khairul Amin, Md. Ahmadul Islam , Farzana Akter , Tasmia Akter Rosy, Md. Nazrul Islam

doi:10.5455/faa.72409

Abstract

The study was concerned with the kinetics of dehydration of jackfruit and mango pulp and their use for the development of mixed leather. Kinetics study showed that jackfruit pulp dried faster than mango pulp. The chemical composition of fresh jackfruit and mango pulp showed that moisture, ash, protein, fat, vitamin -C, acidity, pH and total soluble solids content were found 74.23%, 0.86%, 1.55%, 0.60%, 5.04 mg/100g, 0.224% (wb), 5.41 and 25.0% for jackfruit pulp, whereas for mango pulp, the contents are 80.1%, 0.45%, 1.2%, 0.70%, 24.2 mg/100 g, 0.48% (wb), 3.79 and 18.0% respectively. During mechanical drying, it was shown that drying rate decreased with the increase in thickness and for fresh jackfruit and mango pulp, values of index ‘n’ were 0.38 and 0.20 at 60°C respectively, whereas for steam blanched jackfruit and mango pulp, value of index ‘n’ were 0.38 and 0.29 at 60°C respectively and these were lower than 2 as predicted by the Fick’s 2nd law of diffusion. The activation energy (Ea) was calculated as 3.12, 2.786, 2.90 and 2.786 Kcal g-1 mole, respectively for the fresh jackfruit, fresh mango, steam blanched jackfruit and steam blanched mango pulps respectively. The organoleptic taste test showed that sample 401 (Fruit pulp with sugar and KMS) secured highest score.

Key words: Dehydration, Jackfruit pulp, Mango pulp, Mixed leather and Activation energy


[5] Response of short duration aman (monsoon) rice varieties to nitrogen fertilization

Md. Moshiur Rahman, Md. Monirul Islam, Md. Mahamudul Hasan, Md. Delwar Hossain

doi:10.5455/faa.71090

Abstract

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh (latitude of 24.750 N, longitude of 90.50 E and altitude l8 m) during 5 July to 21 November, 2017 to find out the effect of nitrogen rates on the yield performance of two short duration transplant Aman (monsoon) rice varieties. The experiment included two rice varieties viz. Binadhan-7 and BRRI dhan49 and six rates of nitrogen viz. 0, 30, 60, 90, 120 and 150 kg N ha-1 in a split- plot design with three replications. The result revealed that grain yield was significantly influenced by rate of nitrogen but not by variety and interaction between variety and nitrogen rates. The highest yield was achieved at 120 kg N ha-1 which was similar with 90 kg N ha-1. The highest yield was attributed to higher number of effective tiller hill-1 at higher nitrogen rates. The field trial showed the highest grain yield for Binadhan-7 and BRRI dhan49 for90-120 kg N ha-1. However, the estimated optimum rate of nitrogen from response analysis for Binadhan-7 and BRRI dhan49 were 107 and 103 kg N ha-1, respectively. Present study reveals that the highest yield of the two short duration rice varieties Binadhan-7 and BRRI dhan49 could be obtained by applying 107 and 103 kg N ha-1, respectively.

Keywords: Monsoon rice, nitrogen rate optimization, short duration variety, quadratic response model


[6] Identification of plant growth promoting antagonistic bacteria against Xanthomonas oryzae pv. oryzae in Bangladesh

Md. Rashidul Islam, Noor E Tajkia Islam, Papia Sharmin Juthy, Md. Mahbubul Haque, Md. Mahfujur Rahman

doi:10.5455/faa.67224

Abstract

Bacterial leaf blight (BLB) is a major disease which is caused by Xanthomonasoryzaepv. oryzae and this diseases is a great threat to rice production worldwide. Several biological, chemical and genetic control approaches has resulted the improved management of BLB of rice. Recently, biological control using plant growth-promotingbacteria is emerging as potential alternative to chemicals.Therefore, identification and evaluation of new PGP bacteria from native sources is an essential step to determine their activities on plant growth promotion. The purposeof this work was to isolate and identify the plant growth promoting bacteria from rice phylloplane and rhizosphere that antagonistic to X. oryzaepv.oryzae, the causal agent of BLB of rice for eco-friendly management of the disease. Rice phylloplane and rhizosphere bacteria were isolated from the surface of rice leaves and stem as well as from the soil attached to the roots of rice plants, respectively, by dilution plate technique. The antagonistic activity of these isolated bacteria was determined by dual culture method. The antagonistic bacterial isolates were identified by sequencing of 16SrDNA.The activities related to plant growth promotion were determined by Indole Acetic Acid (IAA) production, siderophore and phosphate solubilizationassay.The promotion of plant growth wasassessed by the determination of root length, shoot length and vigor index. (Root length, shoot length and vigor index was the determiner of plant growth promotion.). Sixteen bacterial isolates were identified as antagonist to X. oryzaepv.oryzae out of 300 bacterial isolates by dual culture method. The maximum growth inhibition (33.5mm) of X. oryzaepv.oryzaewas recorded in plate inoculated with BDISOB05P while the minimum growth inhibition(5mm)was recorded by BDISOB98Pand BDISOB272R. The moderate growth inhibition was recorded in BDISOB241P, BDISOB16P, BDISOB306R,BDISOB242P,BDISOB220R,BDISOB04P,BDISOB258R, BDISOB219R, BDISOB221R, BDISOB275R, BDISOB283R and BDISOB61R.16S rDNA sequencing was used to identify the bacterial isolates which were antagonistic. The bacterial isolates were identified BDISOB04P as Pseudomonas putida, BDISOB05P as Pseudomonas putida, BDISOB16P as Bacillus sp.,BDISOB98P as Stenotrophomonas maltophilia,  BDISOB241P as Burkholderia sp., BDISOB242P as Burkholderia gladioli,  BDISOB219R as Pseudomonas taiwanensis,  BDISOB220R as Serratia sp., BDISOB221R as Pseudomonas sp., BDISOB222R as Pseudomonas plecoglossicida, BDISOB258R as Pseudomonas putida, BDISOB272R as Stenotrophomonas maltophilia, BDISOB275R as Pseudomonas putida , BDISOB283R as Pseudomonas fluorescens and BDISOB306R as Pseudomonas putida. The results of growth promoting determinants revealed that eight antagonistic bacterial isolates produce Indole acetic acid (IAA), sixteen bacterial isolates were able to produce siderophore and nine bacterial isolates were found to show phosphate solubilizing capability. The results of plant growth promotion activities indicating that these bacterial isolates can increase the root growth, shoot growth and vigor index. The results conceded some of the PGPbacterial isolates seem potential in inhibiting the growth of X. oryzaepv. oryzaeas well as inpromoting the growthof rice plants.

Key words: Identification, plant growthpromoting,antagonistic,bacteria,Xanthomonasoryzaepv. oryzae


[7] Assessment of some exotic potato accessions/cultivars for their yield performance under Bangladesh condition

Md. Murad Hossan Chowdhury, Md. Amirul Islam, Md. Habibur Rahman, Md. Abdur Rahim, Md. Atikuzzamman, Maria Akter Sathi

doi:10.5455/faa.59383

Abstract

A field research was conducted at the Horticulture Farm of Bangladesh Agricultural University, Mymensingh during the period between November 2011 and February 2012 to determine the yield performance of some exotic potato accessions/cultivars. The experiment was laid out in randomized complete block design (RCBD) with three replications. The experiment comprised of six (6) different exotic potato accessions viz. i) AC10064, ii) AC10076, iii) AC10097, iv) AC10109, v) AC10123, vi) AC10190 and one cultivar Cardinal as control. Various data were recorded on yield and different yield contributing characters. The lowest days required for plant emergence at accession AC10109 (6.25) and the maximum days required at variety Cardinal (10.02). The highest  tuber length (7.11 cm) and diameter (5.70 cm) were found in the accession AC10109 and lowest length (5.85 cm) and diameter (3.81 cm) of tubers were found in the variety Cardinal. The maximum (274.74 g) and the minimum (130.11 g) yield of tubers per hill were found in accession AC10109 and Cardinal, respectively. The maximum yield of tubers per hectare was obtained from the accession AC10109 (29.31 t ha-1) closely followed by AC10064 (28.88 t ha-1) and the minimum yield of tubers was obtained from the accession Cardinal followed by AC10190 (15.97 t ha-1). Considering the yield performance, potato accession AC10109 was the best performer followed by AC10064 and performed better than popular existing variety Cardinal, therefore these two accessions may be considered for further multi-location trial before final recommendation.

Keyword: Potato, accession, growth, yield


[8] Effects of fruit thinning on the on-and off-season production of guava

Md. Al Ekram , Md. Harun Ar Rashid, Md. Abdur Rahim, Tahmina Akter

doi:10.5455/faa.60378

Abstract

The study was conducted at the FTIP Germplasm Centre of the Bangladesh Agricultural University (FTIP BAU-GPC), Mymensingh during the period from July 2017 to October 2018 to find out the effects of fruit thinning on the off-season quality guava production. The two factor experiment consisted of two guava varieties viz. Swarupkathi and BAU Peyara-5, and six type fruit thinning namely no fruit thinning (control), 20% fruit thinning, 40% fruit thinning, 60% fruit thinning, 80% fruit thinning and 100% fruit thinning. The experiment was carried out in a randomised complete block design (RCBD) with three replications. Guava varieties and fruit thinning both had significant effects on both on-season and off-season guava production. During on-season, Swarupkathi showed superiority over BAU Peyara-5. During off-season, yield of Swarupkathi was 1.73 kg plant-1, whereas BAU Peyara-5 produced only flowers but no fruit due to flower dropping in off-season. In respect of thinning effect during on season 6.05 kg fruit per plant was produced with 80% fruit thinning, which was the best in on-season. During off-season 1.51 kg fruit per plant was produced with 100% fruit thinning of previous season, which was the best in off-season. For combined effect during on-season, Swarupkathi produced 8.60 kg fruit per plant at 80% fruit thinning which was found to be better result in Swarupkathi after different times of thinning practices, whereas BAU Peyara-5 produced 3.50 kg fruit per plant at 80% fruit thinning which was found to be better result in BAU Peyara-5 after different thinning practices. During off-season, Swarupkathi produced 3.01 kg fruit per plant with 100% fruit thinning of previous season, which was found to be better result in Swarupkathi, while BAU Peyara-5 produced few flowers (3) and did not produce any fruit due to flower dropping.

Key words: BAU Peyara-5, percent fruit thinning, guava, productivity, Swarupkathi, TSS