Jahangirnagar University Journal of Biological Sciences最新文献

筛选

英文中文

Abundance, distribution and population dynamics of Bemisia tabaci on brinjal and tomato 茄子和番茄上烟粉虱的丰度、分布及种群动态

Jahangirnagar University Journal of Biological Sciences Pub Date : 2018-08-18 DOI: 10.3329/JUJBS.V7I1.37976

Mmh Khan, I. Hossain

{"title":"Abundance, distribution and population dynamics of Bemisia tabaci on brinjal and tomato","authors":"Mmh Khan, I. Hossain","doi":"10.3329/JUJBS.V7I1.37976","DOIUrl":"https://doi.org/10.3329/JUJBS.V7I1.37976","url":null,"abstract":"In order to study the abundance, distribution and population dynamics of whiteflies (Bemisia tabaci Genn) in the agriculture farm and homestead garden of Patuakhali Science and Technology University (PSTU) campus and farmer’s field, brinjal and tomato plants were selected as study materials. Results revealed that the highest number of whitefly/plant (3.43) was recorded in brinjal at farmer’s field followed by PSTU farm (1.13) while lowest was in homestaed gardem (1.00) than tomato. The highest percentage of plant attacked per plot by whitefly was recorded in brinjal (16.67%/plot) while the lowest percentage was in tomato (9.76%/plot). The highest mean percentage of B. tabaci adult was observed in the middle canopy (64%) while the lowest was in lower canopy. The highest percent plant attacked (56.25%/plot) was recorded on 2nd March while the lowest attacked (9.09%/plot) was recorded on 15th February. The similar trend was also found in case of tomato. The highest percent plant attacked (56.25%/plot) was recorded on 2nd March followed by 1st April (50%/plot) and 17 March (33.33%/plot) while the lowest attacked (9.09%/plot) was recorded on 15th February followed by 30th January (10.98%/plot).Jahangirnagar University J. Biol. Sci. 7(1): 65-71, 2018 (June)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122094526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effects of fresh rice straw and water levels on CO2-C gas emission, soil organic carbon content and rice production 鲜稻秸秆和水位对CO2-C气体排放、土壤有机碳含量和水稻产量的影响

Jahangirnagar University Journal of Biological Sciences Pub Date : 2018-08-18 DOI: 10.3329/JUJBS.V7I1.37973

Mb Hossain

{"title":"Effects of fresh rice straw and water levels on CO2-C gas emission, soil organic carbon content and rice production","authors":"Mb Hossain","doi":"10.3329/JUJBS.V7I1.37973","DOIUrl":"https://doi.org/10.3329/JUJBS.V7I1.37973","url":null,"abstract":"An experiment was conducted at Bangladesh Institute of Nuclear Agriculture (BINA) farm, Mymensingh, Bangladesh during 2010-2011 to find out the effect of different water and organic residue levels on rice production and soil organic carbon content. Organic carbon rates from rice straw (0.5, 1.0, 1.5 and 2.0 t C ha-1 including control) were evaluated under alternate wetting and drying (AWD) and continuous flooding (CF) systems. Each treatment also received the recommended dose of chemical fertilizers excluding control. Factorial experiment was laid out in a complete randomized design with three replications. Results revealed that, maximum plant height, filled grains per tiller, 1000 grains weight, grain and straw yield were also observed in continuous flooding system in combination with 2.0 t C ha-1 in 2010 and 2011, respectively. Combined use of chemical fertilizers, 2.0 t C ha-1 fresh rice straw and continuous flooding system performed better results to reduce CO2-C gas emission, increased organic carbon and rice production with maintaining optimum soil pH level. Continuous flooding with 2.0 t C ha-1 as fresh rice straw is an effective way to reduce CO2-C emission, optimize soil pH and contribute to sustainable rice production for food security.Jahangirnagar University J. Biol. Sci. 7(1): 45-53, 2018 (June)","PeriodicalId":259237,"journal":{"name":"Jahangirnagar University Journal of Biological Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125271770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

首页上一页