scholarly journals Effects of lead on growth, yield and mineral nutrition of rice (Oryza sativa L.)

2020 ◽  
Vol 5 (2) ◽  
pp. 83-92
Author(s):  
P Jasmin ◽  
WZ Prian ◽  
MN Mondol ◽  
SM Ullah ◽  
AS Chamon
Keyword(s):  
Oryza Sativa ◽  
Lead Concentration ◽  
Oryza Sativa L ◽  
Poultry Litter ◽  
Growth Yield ◽  
Lead Toxicity ◽  
Dry Weight ◽  
Cow Dung ◽  
Lead Uptake ◽  
Positive Effects

A pot experiment was conducted to evaluate the effect of lead (50, 100, 150 and 200 mg kg-1) on rice (Oryza sativa) and remediation of metal contamination by applying cow dung, poultry litter and lime to alleviate lead toxicity. The lengths, fresh and dry weights of shoot, root and macronutrients decreased with increasing level of lead compared to the control. The maximum reduction was observed in the pots treated with 200 mg kg-1 lead (19.50 and 20.03% for grain, 17.15 and 19.75% for shoot and 17.96 and 30.02% for root on the fresh and dry weight, respectively). The highest reduction in macronutrient content was observed in 200 mg kg-1 lead treated pot where N, P, K, Ca and Mg concentrations were reduced by 31.14, 47.44, 22.49, 21.84 and 31.58% for shoot and 28.95, 55.64, 37.5, 49.33 and 23% for root, respectively. On the other hand lead concentration in roots and shoots were increased with increasing lead treatment compared to the control. Treatments of the amendments (cow dung, poultry litter and lime) had positive effects though cow dung outshining the rest of them. This particular organic matter had considerable decreasing impacts in lead uptake by rice. Cow dung treated pots increased fresh and dry weight by 31.48 and 32.07% for grain, 14.08 and 35.30% for shoot and 57.09 and 34.48% for root compared to pot treated with 100 mg kg-1 lead. Cow dung remediated lead concentration by 48.85, 65.00 and 62.00% for grain, shoot and root, respectively. J. Biodivers. Conserv. Bioresour. Manag. 2019, 5(2): 83-92

scholarly journals Effects of Tiba and Rhizobium Application on Growth, Yield and Biochemical Components of Brri Dhan-55 (Oryza Sativa L.)

2021 ◽  
Vol 50 (4) ◽  
pp. 1181-1189
Author(s):  
Nasrin Akhter Doel ◽  
Amm Golam Adam ◽  
Farhana Islam Khan ◽  
Hasna Hena Begum
Keyword(s):  
Protein Content ◽  
Oryza Sativa L ◽  
Growth Yield ◽  
Dry Weight ◽  
Grain Filling ◽  
Yield Attributes ◽  
Rhizobium Inoculation ◽  
Positive Effects ◽  
Biochemical Components ◽  
Net Assimilation

Effects of TIBA (10, 25, 50 ppm) and Rhizobium inoculation on growth, yield and biochemical components of BRRI Dhan-55 were investigated. Results showed that application of 10 ppm TIBA produced tallest plant, higher number of tillers and leaves per plant although statistically identical to control. The Rhizobium and TIBA treatments had mostly retarding effects on dry weight of leaves, shoots and roots where the lowest values was obtained from Rhizobium application. Leaf area ratio was positively affected by TIBA and Rhizobium treatments except due to 10 ppm where, significantly maximum value was noted from Rhizobium treatment. Specific leaf weight, relative growth rate and net assimilation rate were negatively responded following all treatments and the least value was also recorded from Rhizobium treatment in each cases. Yield attributes and yield of BRRI Dhan-55 were both positively and negatively influenced by Rhizobium and TIBA treatments. The highest harvest index was found in Rhizobium treated plants. The only increase in yield per plant due to 10 ppm TIBA was 2.48 % over the control but statistically similar to control. Results showed that Rhizobium inoculation had showed lowest value in protein content of leaves and seeds. Application of TIBA treatments had significant positive effects on protein content of leaves at flowering stage. However, the influence was rather negative at both tillering and grain filling stages. The 25 ppm TIBA resulted significantly maximum protein content of seeds followed by 10 ppm. Bangladesh J. Bot. 50(4): 1181-1189, 2021 (December)

Rates of Mortality, Growth, and Biomass Production of Lymnaea palustris During Chronic Exposure to Lead

1978 ◽  
Vol 35 (8) ◽  
pp. 1109-1115 ◽  
Author(s):  
U. Borgmann ◽  
O. Kramar ◽  
C. Loveridge
Keyword(s):  
Growth Rate ◽  
Mortality Rate ◽  
Biomass Production ◽  
Lead Concentration ◽  
Lead Toxicity ◽  
Dry Weight ◽  
Freshwater Snail ◽  
Rate Function ◽  
Lead Uptake ◽  
Percent Mortality

Lymnaea palustris, a freshwater snail, was exposed to lead in a continuous-flow system from newly laid eggs until reproductive maturity. Lead, at concentrations as low as 19 μg∙L−1, caused a significant increase in the mortality rate, although the growth rate was not affected. The lead-induced mortality was proportional to the lead concentration raised to the exponent 2.5. The analysis of mortality as a rate function was found superior to the use of the more conventional LC50 (concentration resulting in 50% mortality). A plot of the logarithm of the lead-induced mortality against log lead concentration is linear and has the same slope as plots of double logarithms of the inverse survival at any one time versus log lead concentration or log time versus log LC50 or log LT50 (time to 50% mortality) versus log lead concentration. The mortality rate, unlike the percent mortality, is independent of time and can be combined directly with the growth rate to estimate the biomass production rate. A 50% drop in the rate of biomass production was observed at 36 μg∙L−1 and a drop to 0 production at 48 μg∙L−1. Lead uptake in whole snails was found to be proportional to the lead concentration in the water, giving a concentration factor of 8500 on a dry weight basis. Key words: snails, lead, toxicity, biomass production, bioaccumulation

scholarly journals Effects of Lead on Growth and Mineral Nutrition of Wheat (Triticum Aestivum L.) As Influenced by Manure and Lime

2021 ◽  
Vol 6 (2) ◽  
pp. 69-76
Author(s):  
P Jasmin ◽  
AS Chamon ◽  
MN Mondol ◽  
SM Ullah
Keyword(s):  
Triticum Aestivum ◽  
Mineral Nutrition ◽  
Lead Concentration ◽  
Poultry Litter ◽  
Dry Weight ◽  
Triticum Aestivum L ◽  
Organic Manure ◽  
Lead Uptake ◽  
Maximum Reduction ◽  
Four Levels

A pot experiment was conducted to evaluate the effects of four levels of lead (50, 100, 150 and 200 mg/kg) treatment on wheat (Triticum aestivum L.) and its amelioration by cowdung, poultry litter and lime. The lengths, fresh and dry weights of shoot and root decreased with increasing level of lead as well as the macronutrients compared to the control. The maximum reduction was observed in the pots treated with 200 mg/kg lead. The highest reduction in macronutrient content was also observed in 200 mg/kg Pb treated pot whereas N, P, K, Ca and Mg concentration was reduced by 0.41, 0.019, 1.15, 0.38 and 0.071% for shoot and 0.512, 0.071, 0.17, 0.51 and 0.122% for root, respectively. Lead concentration in roots and shoots increased with increasing level of lead treatment compared to the control. Cowdung was shown to be most effective, followed by poultry litter and lime. This particular organic manure had considerably greater decreasing impacts in lead uptake by wheat crops. Cowdung treated pots increased fresh and dry weight by 14.56 and 13.28% for grain, 7.58 and 7.08% for shoot and 2.41 and 2.06% for root compared to pot treated with 100 mg/kg lead. J. Biodivers. Conserv. Bioresour. Manag. 2020, 6(2): 69-76

scholarly journals Transfer of Arsenic from Groundwater and Paddy Soil to Rice (Oryza sativa L.) Grain: A Micro Level Study in Chandina, Comilla

2015 ◽  
Vol 12 (2) ◽  
pp. 74-82 ◽  
Author(s):  
Md. Habibur Rahman ◽  
Md. Mohashin Farazi ◽  
Kohinoor Begum ◽  
Md. Serazul Islam
Keyword(s):  
Oryza Sativa ◽  
Irrigation Water ◽  
Agricultural Soil ◽  
Oryza Sativa L ◽  
Arsenic Concentration ◽  
Dry Weight ◽  
Permissible Limit ◽  
Arsenic Content ◽  
Soil Arsenic ◽  
Micro Level

Rice (Oryza sativa L.) is one of the major food crops in many countries. As the cultivation of rice requires huge volume of water, long term use of Arsenic contaminated groundwater for irrigation may result in the increase of arsenic concentration in the agricultural soil and eventually accumulation in rice grains. A micro level study was conducted to investigate the transfer of arsenic from irrigation water and soil to rice plants in the arsenic affected 8 unions of Chandina upazilla, Comilla district. The level of arsenic in irrigation water (0.12±0.08 and 0.67±0.07 mg l-1) was much above the WHO permissible limit of 0.01 mg l-1 for drinking water and FAO permissible limit of 0.10 mg l-1 for irrigation water. The total soil arsenic concentrations ranged from 3.21±0.80 to 8.74±2.83 mg kg-1 dry weight of soil, which was below the maximum acceptable limit for agricultural soil of 20.0 mg kg-1 as recommended by the European Community. The accumulation of arsenic in the grain ranged from 0.12±0.04 to 0.58±0.06 mg kg-1 in Boro and 0.16±0.04 to 1.06±0.20 mg kg-1 in T. Aman. Except grain sample (T. Aman) of one union, the grains in both Boro and T. Aman of all unions did not exceed 1.0 mg kg-1 dry weight of arsenic (the permissible limit of arsenic in rice according to WHO recommendation). Thus, till now rice has remained harmless for consumption in the study area. The results clearly showed that the arsenic content in the grains of Boro rice is correlated to the intensity of arsenic contamination of irrigation water and soil. The Agriculturists 2014; 12(2) 74-82

scholarly journals Evaluation of Rice (Oryza sativa L.) Genotypes for Drought Tolerance at Germination and Early Seedling Stage

2018 ◽  
Vol 16 (1) ◽  
pp. 44-54 ◽  
Author(s):  
M M Islam ◽  
E Kayesh ◽  
E Zaman ◽  
T A Urmi ◽  
M M Haque
Keyword(s):  
Oryza Sativa ◽  
Water Stress ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Evaluation System ◽  
Oryza Sativa L ◽  
Dry Weight ◽  
Seedling Height ◽  
Early Seedling ◽  
Rice Genotypes

Drought stress is a major constraint to the production and yield stability of crops. Rice (Oryza sativa L.) is considered as a drought-sensitive crop species. Within this species, there are considerable varietal differences in sensitivity to this environmental stress. An experiment was conducted at the laboratory of the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Bangladesh during April to September 2016 to evaluate 100 rice genotypes for drought tolerance during germination and early seedling growth stage. The genotypes were tested against five levels of drought stress imposed by Polyethylene glycol 6000 (PEG-6000) @ 0, 5, 10, 15 and 20%. The experiment was laid out in a complete randomized design with four replications. The results showed that with increasing water stress, germination in all the genotypes decreased from 95.8% in control to 6.6 % in highest stress (20% PEG) level. Seedling height and dry weight also decreased in all rice genotypes with the increase in water stress level. Based on Standard Evaluation System (SES),18 genotypes were selected primarily. Among the 18 genotypes, Ratoil and Chinisakkar showed higher germination index, relative seedling height and relative seedling dry weight than the check drought tolerant BRRI dhan43 at 20% PEG. Beside these, performance of Kumridhan, Pusur and Somondori was also well at this level compared to BRRI dhan43. The genotypes Ratoil, Chinisakkar, Kumridhan, Pusur and Somondori showed the best performance under drought condition. The Agriculturists 2018; 16(1) 44-54

Enhanced Growth and Yield of Rice (Oryza sativa L.) and Soil Enrichment is Mediated by Enhanced Availability of N and P in Soil and Plant Leaves on Application of Organic Matrix Entrapped Urea and DAP

2015 ◽  
Vol 1 (01) ◽  
pp. 57-68
Author(s):  
Rana Pratap Singh ◽  
Vishalakcchi Ashok ◽  
Sanjeev Kumar
Keyword(s):  
Oryza Sativa ◽  
Field Experiments ◽  
Oryza Sativa L ◽  
Organic Matrix ◽  
Growth And Yield ◽  
Cow Dung ◽  
Plant Leaves ◽  
Chemical Fertilizers ◽  
Field Station ◽  
Neem Leaves

Field experiments were conducted during the Kharif season of the cropping years 2011 and 2012 at the Experimental Field Station of Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow to compare the efficacy of organic matrix entrapped chemical fertilizers i.e. Urea and DAP (OMECF) with the conventional chemical fertilizers (CCF) and no fertilizer (NF) for the cultivation of rice (Oryza sativa). The OMECF prepared in granular form contained cow dung, powder of neem leaves (Azadirachta indica), and clay soil (diameter of particles less than 0.02 mm) in 1:1:1 ratios and 15% saresh (plant gum of Acacia sp.) as binder a long with half and one fourth of the recommended dose of commercially available urea and DAP. Single basal application of OMECF showed an increase in plant growth in terms of fresh and dry weights, root length, shoot length, root and leaves numbers and levels of NO3-, NO2-, NH4 + and PO4 -in the rhizosphere and their accumulation in plant leaves.

Azospirillum amazonense inoculation: effects on growth, yield and N2 fixation of rice (Oryza sativa L.)

2007 ◽  
Vol 302 (1-2) ◽  
pp. 249-261 ◽  
Author(s):  
Elisete Pains Rodrigues ◽  
Luciana Santos Rodrigues ◽  
André Luiz Martinez de Oliveira ◽  
Vera Lucia Divan Baldani ◽  
Kátia Regina dos Santos Teixeira ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
N2 Fixation ◽  
Oryza Sativa L ◽  
Growth Yield ◽  
Azospirillum Amazonense
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