Volume 3 Issue 3 (September 2017)

Most.  Arifunnahar¹*, Md. Momraz Ali², Rabiul Islam³, Md. Amin Uddin Mridha⁴, F. M. Aminuzzaman⁵

¹Plant Pathology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh
²Department of Agricultural Extension, Bagatipara, Natore-6410, Bangladesh
³Oilseed Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh
⁴Department of Botany, Chittagong University, Chittagong-4331, Bangladesh
⁵Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

The present experiment was conducted in the net house of the Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh with a view to studying the role of Arbuscular Mycorrhizal (AM) fungi on growth and nutrient uptake of some vegetable crops. Root segment of Cassia tora along with rhizosphere soil was used as inocula. In inoculated pot, raw inocula were used and in control pot sterilized root and soil inocula were applied to ensure same nutritional condition. Different number of seeds was sown based on seed size of the selected vegetables. A positive growth response to AM was observed in all the selected vegetables such as spinach (Spinacia oleracea L.), Indian spinach (Basella alba L.) and water spinach (Ipomoea aquatica). The seedling emergence, plant height, root length and shoot length of mycorrhiza inoculated vegetables were comparatively higher than that of un-inoculated control. Mycorrhizal root colonization differed among the crops ranging from 18.65 to 44.26%. The mycorrhizal inoculation suppressed root rot, damping off and leaf spot disease of spinach, Indian spinach, and water spinach. Mycorrhizal dependency was ranged from 18.57 to 36.36%. Increased nutrient (N, P, K, Fe, and Zn) uptake was recorded with the inoculated plants. Among the inoculated vegetables, comparatively higher N, P, and K uptake was observed in spinach and water spinach whereas Zn and Fe uptake was found higher in spinach, respectively. Arbuscular Mycorrhizal fungi showed positive response in case of plant growth parameters and it could be used as a bio-fertilizer.

Keywords: VAM fungi, vegetable, growth & nutrient uptake.

*Corresponding author.
E-mail address: bonitaplpa@yahoo.com (Most.  Arifunnahar )

Cite this article: Arifunnahar, M.,  Ali, M.M., Islam R., Mridha,  M.A.U. &  Aminuzzaman, F. M.  (2017). Effect of arbuscular mycorrhizal fungi on growth and nutrient uptake of some vegetable crops. Intl. J. Appl. Res. 3, 3, 01-6. 

Lutfun Nahar^*, Rakiba Shultana, Khairul Alam Bhuiyan, Md. Zakaria Ibne Baki and Romana Akter

Agronomy Division, Bangladesh Rice Research Institute, Joydebpur, Gazipur-1700, Bangladesh

To investigate the performance of different crop residues and pre-emergence herbicide in terms of weed control efficiency in transplanted Aman rice, an experiment was taken in the net house of Agronomy division, BRRI, Joydebpur, Gazipur-1701 during T. Aman in 2016. The experiment comprised of five weed control treatment viz. chopped (2-3 cm) crop residues of sorghum (T₁), Chopped (2-3 cm) crop residues of soybean (T₂), chopped (2-3 cm) crop residues of mungbean (T₃), chopped (2-3 cm) crop residues of rice (T₄), pre-emergence herbicide (Butachlor) (T₅) and control (no weed management method) (T₆) and it was laid out in complete randomized design with three replications. The result revealed that application of pre-emergence herbicide (Butachlor) showed lowest weed density (25.0 m^-2), weed dry matter weight (6.5 gm^-2) and highest weed control efficiency (75.0%) followed by application of sorghum and rice straw residues. The lowest weed control efficiency (58%) was obtained from control treatment. Overall, herbicide treatments provided better weed control than the crop residues treatments. Herbicide-treated plots showed greater rice yield (5.11 t ha^-1) that was similar with sorghum and rice straw residues treated plot. So, to reduce herbicide use in the present situation of Bangladesh, natural herbicide or crop residues application may alternative option of synthetic herbicides to suppress weeds in rice cultivation. However, more studies are required to fully explore the possibility of environment-friendly weed management in rice. Such studies may decrease total use of herbicides.

Keywords: Crop residues, Herbicide, Weed control efficiency, Transplanted Aman rice, Allelopathic phenomenon, Phytotoxicity.

*Corresponding author.
E-mail address: lutfun.sau@gmail.com (Lutfun Nahar )

Cite this article: Nahar, L., Shultana, R., Bhuiyan, K.A., Baki, M.Z.I., &  Akter, R. (2017). Assessment of different crop residues and herbicide on weed control efficiency in Transplanted Aman rice. Intl. J. Appl. Res. 3, 3, 7-13. 

Md. Moniruzzaman^*, Md. Saiful Islam, Abu Rayhan, Md. Shahidul Islam, Sonia Sharmin and Anuradha Bhadra

Scientific Officer, Bangladesh Fisheries Research Institute (BFRI), Mymensingh-2201, Bangladesh

This study has been conducted to identify the threatened fish species and focus on fish biodiversity conservation in the Dharla River Lalmonirhat district. The present study was conducted for a time period of nine months (March-November, 2016). A total of 21 threatened fish species were identified in the river among them, 7 vulnerable, 11 endangered and 3 critically endangered species as well as 8 exotic fish species were found in the river. The fishing gears used by the fishermen in Dharla River includes 6 types of nets, 5 types of traps, 2 hooks and lines and 3 types of wounding gears whereas major fishing craft and gears were mainly wooden boat and seine net (locally called ‘jhaki jal’) respectively. Due to environmental degradation and manmade causes the biodiversity of this river decreasing day by day and it could be minimized by proper management and conservation techniques..

Keywords: Threatened fish, Dharla River, Biodiversity, Exotic fish and Lalmonirhat

*Corresponding author.
E-mail address: monirenvsc@gmail.com (Moniruzzaman M )

Cite this article: Moniruzzaman, M., Islam,M.S. Rayhan, A., Islam, M.S., Sharmin, S. & Bhadra, A. (2017). Present status of threaten fish species in Dharla River of Bangladesh. Intl. J. Appl. Res. 3, 3, 14-20. 

Aovijite Bosu¹*, Md. Moniruzzaman¹, SM Priyongkor Roy², Bipul Chandra Roy³

¹Bangladesh Fisheries Research Institute, Mymensingh-2201, Bangladesh
²Department of Fisheries Management, Bangladesh Agricultural University-2202, Bangladesh
³Department of Fisheries Technology, Bangladesh Agricultural University-2202, Bangladesh

An experiment was carried out for 90 days at Faridgonj Upazila, Chandpur District, to determine the water quality parameters in the freshwater ponds.  Ponds were selected on the basis of size, shape, water color and surrounding conditions. The study was conducted in three treatments where two treatments (T₂ and T₃) have three replications and treatment T₁ have four replications. During the  experimental period, the water quality parameters such as water temperature, transparency, dissolved oxygen, nitrate-nitrogen, nitrite-nitrogen, alkalinity, phosphate-phosphorus, ammonia-nitrogen, pH and chlorophyll-a were observed  monthly at Limnology Laboratory, Bangladesh Fisheries Research  Institute, Riverine Station, Chandpur. The highest temperature (35°C) was recorded in February whereas the lowest (32°C) in January. The highest of pH (7.16) and transparency (36 cm) were recorded in January respectively. The lowest pH (6.28) in March whereas the lowest transparency (28 cm) in February respectively. The highest value (4.92 mg l^-1) and the lowest value (3.75 mg l^-1) of dissolved oxygen were recorded in March and January respectively. Total Alkalinity of the homestead ponds varied from 28 mg l^-1 to 122 mg l^-1 which were recorded in February and January. The maximum concentration of Phosphate-phosphorus, Nitrite-nitrogen, Nitrate-nitrogen and Ammonia-nitrogen were recorded 2.03 mg l^-1, 0.26 mg l^-1, 0.55 mg l^-1 and 0.76 mg l^-1 in March respectively. The minimum concentration of Phosphate-phosphorus, Ammonia-nitrogen and Nitrite-nitrogen were recorded 0.01 mg l^-1 in January respectively. The lowest value of Nitrate-nitrogen was recorded 0.01 mg l^-1 in March. The lowest value of chlorophyll-a was recorded (1.43 µg l^-1) in March whereas the highest value (72.35 µg l^-1) in March respectively. Except Total Alkalinity, all other parameters were not-significantly varied among treatments. The research findings will benefit the pond owners through improvement of homestead production system in Chandpur district and thus improve their livelihood.

Keywords: Water quality, Monthly change, pH, Chemicals

*Corresponding author.
E-mail address: ovi_bosu08@yahoo.com (Aovijite Bosu)

Cite this article: Bosu A, Moniruzzaman M, Roy SMP, Roy BC (2017). Determination of monthly changes of various water quality parameters in different ponds at Chandpur district. Intl. J. Appl. Res. 3, 3, 21-28.