scholarly journals Time of exposure and oil dosage affecting biomass production of the Amazonian semi-aquatic grass Echinochloa polystachya

Rodriguésia ◽  
2011 ◽  
Vol 62 (4) ◽  
pp. 901-907 ◽  
Author(s):  
Aline Lopes ◽  
Maria Teresa Fernandez Piedade
Keyword(s):  
Crude Oil ◽  
Biomass Production ◽  
Oil Spill ◽  
Root Biomass ◽  
Leaf Length ◽  
Plant Population ◽  
Total Biomass ◽  
Number Of Leaves ◽  
Echinochloa Polystachya ◽  
Exposition Time

Abstract The effects of Urucu crude oil on growth and biomass production of Echinochloa polystachya were studied experimentally. Young plants contaminated with 5 oil doses (0 to 2.64 l.m-2) were monitored at 1, 5, 10, 15 and 20 days after exposure. A significant reduction was observed in leaf humidity and the ratio of live aerial/ total biomass related to the increase in oil dosage. Increased exposition time caused a reduction in the number of leaves, aerial biomass, proportion of live aerial/total biomass, total biomass, and an increase of dead aerial biomass. However, root biomass and leaf length were not affected by exposure to oil. The low tolerance of E. polystachya to Urucu crude oil has lead to the mortality of 90% of the plant population in 20 days at the 2.64 l treatment. The death of young individuals of E. polystachya by relatively low dosages of Urucu oil indicates that, in the case of an oil spill in the Amazon varzea, this species would be severely affected, endangering, consequently, the entire environment.

scholarly journals Effects of water deficit on growth and physiology of young Conocarpus erectus L. and Ficus benjamina L. Saplings

2019 ◽  
Vol 48 (4) ◽  
pp. 1215-1221
Author(s):  
Zikria Zafar ◽  
Fahad Rasheed ◽  
Muhammad Abdullah ◽  
Mir Md Abdus Salam ◽  
Muhammad Mohsin
Keyword(s):  
Water Deficit ◽  
Biomass Production ◽  
Root Biomass ◽  
Growth Parameters ◽  
Co2 Assimilation ◽  
Total Biomass ◽  
Assimilation Rate ◽  
Ficus Benjamina ◽  
Co2 Assimilation Rate ◽  
Conocarpus Erectus

A greenhouse experiment was conducted to investigate the effects of water deficit on growth and physiological parameters of Ficus benjamina and Conocarpus erectus. The results revealed that all growth parameters such as plant height, stem diameter, no. of leaves, no. of branches and chlorophyll contents significantly decreased under water deficit condition. Interestingly, although leaf, stem and total biomass production and allocation decreased significantly under water deficit, but root biomass production and allocation increased significantly. Similarly, stomatal conductance to water vapor decreased significantly and CO2 assimilation rate remained similar to control under water deficit condition. Resultantly, a significant increase in water use efficiency was evident in both species under water deficit condition. These results suggested that, in spite of a significant decrease in biomass production, young Conocarpus erectus and Ficus benjamina can tolerate water deficit which is due to sustained CO2 assimilation rate and increase in root biomass.

scholarly journals Effect of a Fungi Complex in Nine Ecotypes of Cenchrus purpureus (Schumach) Morrone

2021 ◽  
Vol 13 (12) ◽  
Author(s):  
Primavera Pérez-Ramos ◽  
Yuri Villegas-Aparicio ◽  
Rigoberto Castro-Rivera ◽  
Ernesto Castañeda-Hidalgo ◽  
Aarón Martínez-Gutiérrez ◽  
...  
Keyword(s):  
Differential Effect ◽  
Leaf Length ◽  
Growth And Yield ◽  
Total Biomass ◽  
Growth Strategies ◽  
Randomized Design ◽  
Fungal Consortium ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Four Levels

Objective: The objective of this study was to evaluate the response of different concentrations of a fungal consortium on the growth and yield of Cenchrus purpureus ecotypes under storm conditions.Design/Methodology/Approach: An experiment was established under a completely randomized design with a 9X2X4 factorial arrangement. The factors were 9 ecotypes of Cenchrus purpureus, two seasons of the year (Summer-Fall and Winter-Spring), and four levels of mycorrhizal consortium. The variables evaluated were: number of buds, number of leaves, height of the bud, leaf length, total biomass, and leaf-stalk ratio.Results: The response of the ecotypes had a differential effect on the variables NB, LLL, TB and L/SR, while the season affected the variables LN, PH, LLL, MLL, SLL, TB and L/SR. Low inoculation levels increased the variables NB, PH, LLL, MLL and TB.Study Limitations/Implications: The evaluated factors indicate that the level of inoculant and the season determine the growth and yield of Cenchrus purpureus.Findings/Conclusions: The mycorrhizal consortium dose and season of the year mainly determined the growth and yield of C. purpureus. Ecotypes respond differently to changes in the season and in mycorrhizal consortium dose. The evaluated factors indicate that the mycorrhiza dose and the season of the year determine the growth and yield of C.purpureus. Two growth strategies of the ecotypes are visualized: 1) many buds, with few small leaves and 2) few buds with many large leaves

scholarly journals Evaluasi Sistem Budidaya Tanaman Asystasia gangetica T. Anderson yang Ditanam dengan Jarak Berbeda di Bawah Naungan Kelapa Sawit

2019 ◽  
Vol 17 (1) ◽  
pp. 6-10
Author(s):  
Herilimiansyah Herilimiansyah ◽  
Nur Kumalasari ◽  
Luki Abdullah
Keyword(s):  
Biomass Production ◽  
Crop Production ◽  
Block Design ◽  
Nutrient Content ◽  
Leaf Length ◽  
Plant Spacing ◽  
Nutrient Quality ◽  
Nutrient Contents ◽  
Number Of Leaves ◽  
Asystasia Gangetica

The objective of this experiment was to evaluate the cultivation, production and quality systems of Asystasia gangetica T. Anderson as forage in palm oil plantations. This research was arranged in a factorial randomized block design with 2 factors, i.e. palm plantation ages (6 and 8 years old) and different plant spacing (10x10 cm, 25x25cm, and 40x40cm). Variables observed were plant height, number of leaves, number of primary and secondary branches, leaf length and width, biomass production, and nutrient contents. Spacing was significantly affected (p<0.05) on increasing height plant, number of primary and secondary branches, number of leaves, leaf width and length, and biomass production. The spacing also has a significant effect (p<0.05) on nutrient content such as dry matter and crude fiber. The heighest plants average at plant spacing of 10x10 cm was 66.19 cm, the best number of primary and secondary branches at spacing of 25x25 cm were 2 and 10 branches, the average number of the best number of leaves at spacing of 25x25 cm was 80 leaflets, leaveslength and width at spacing of 10x10 cm were 12.49 and 4.29 cm, while the best biomass production at spacing of 10x10 cm was 2766 g. The research concluded that in order to obtain high crop production, the best plant spacing was 10x10 cm under 6 years old of palm plantation, whereas the best nutrient quality was on 25x25 cm spacing.

scholarly journals Effect of Copper Chloride on the Growth of Maize (Zea mays)

2021 ◽  
Vol 64 (2) ◽  
pp. 136-141
Author(s):  
Mujahid Hussain ◽  
Abdul Ghani ◽  
Muhammad Ikram ◽  
Muhammad Nadeem ◽  
Amna Imtiaz ◽  
...  
Keyword(s):  
Zea Mays ◽  
Copper Chloride ◽  
Control Level ◽  
Leaf Length ◽  
Shoot Length ◽  
Total Biomass ◽  
Cereal Crop ◽  
Below Ground ◽  
Number Of Leaves ◽  
Effect Of Copper

Maize is an important cereal crop which is directly eaten by humans. The present study was conducted to access the effect of copper chloride on the growth of Zea mays plant. The experiment was carried out in pots. Different concentration of copper chloride (0 ppm as control, 25 ppm, 50 ppm, 75 ppm) were applied to plant before germination and after two weeks of germination. The results showed that there is decreased in growth of Zea mays takes place, while the highest biomass above ground (3.63±0.2 g, 0.29±0.005 g), biomass below ground (2.26±0.15 g, 0.08±0.005 g) total biomass (5.90±0.20 g, 0.29±0.005g) fresh and dry respectively were noted at control. Maximum shoot length (27.86±1.07 cm), root length (2.46±0.15 cm), leaf length (27.93±0.56 cm), leaf width (3.13±0.30 cm), leaf area (65.72±7.68 cm2), number of leaves (9.0±1.0), number of seeds germinate (10.0±0.50) were also noted at control level.    

scholarly journals Effects of crude oil treatment on the morphology and performance of water hyacinth (Eichhornia crassipes (Mart) Solms) in Niger-Delta region of Nigeria

2020 ◽  
Vol 5 (2) ◽  
pp. 151-156
Author(s):  
Jonathan Chukwudi Iwubeh ◽  
Izundu Alexandra Ikechukwu ◽  
Egboka Tochukwu Praise ◽  
Anukwuorji Chidozie Azubuike ◽  
Anyaegbu Chiamaka Francise
Keyword(s):  
Crude Oil ◽  
Leaf Area ◽  
Oil Spill ◽  
Niger Delta ◽  
Eichhornia Crassipes ◽  
Control Plant ◽  
Dry Weight ◽  
Delta Region ◽  
Niger Delta Region ◽  
Number Of Leaves

Many aquatic plants existing in the Niger Delta area of Nigeria are at the risk of extinction due to oil spill. The present study was aimed at investigating the effect of different concentrations of crude oil on the morphology and growth performance of the hydrophyte, Eichhornia crassipes present in coastal waters of Nigeria’s Niger Delta region, where crude oil exploitation as well as oil spill is high. The plant, E. crassipes was subjected to varying concentrations of crude oil treatments (1.25%, 2.5%, 5%, 7.5% and 10%). Each treatment was replicated three times. The performance was measured using various growth parameters which include height, number of leaves, leaf area, fresh weight and dry weight. The results showed that the control plant performed better than the treated plants with respect to all the morphological characters considered. The control plant of E. crassipes produced a height of 7.56±0.028 from an initial height of 6.02±0.028. Among the treated plants, 1.25% and 2.5% promoted height, leaf area, number of leaves, fresh and dry weight up to the 6th week of growth while 7.5% and 10% decreased plant height up to the 4th week. The E. crassipes treated with 7.5% and 10% crude oil concentrations died 6 weeks following the treatments. The ability of E. crassipes to tolerate the different levels of crude oil was authenticated in this study. However, the study showed that there is a limit of sustenance of petroleum hydrocarbons pollution for E. crassipes above which toxicity will apply.

The dynamics of fine root length, biomass, and nitrogen content in two northern hardwood ecosystems

1993 ◽  
Vol 23 (12) ◽  
pp. 2507-2520 ◽  
Author(s):  
Ronald L. Hendrick ◽  
Kurt S. Pregitzer
Keyword(s):  
Biomass Production ◽  
Root Length ◽  
Root Biomass ◽  
Fine Root ◽  
Fine Root Biomass ◽  
Total Biomass ◽  
Total N ◽  
Northern Hardwood ◽  
Production Values ◽  
Fine Root Length

The dynamics of fine (<2.0 mm) roots were measured in two sugar maple (Acersaccharum Marsh.) dominated ecosystems (northern and southern sites) during 1989 and 1990 using a combination of minirhizotrons and destructive harvests of fine root biomass and N content. Greater than 50% of annual length production occurred before midsummer in both ecosystems, while the period of greatest mortality was from late summer through winter. About one third of annual fine root production and mortality occur simultaneously, with little observable change in total root length pools. Using fine root length dynamics to derive biomass production and mortality, we calculated annual biomass production values of approximately 8000 and 7300 kg•ha−1•year−1, respectively, at the southern and northern sites. Corresponding biomass mortality (i.e., turnover) values were 6700 and 4800 kg•ha−1•year−1, and total nitrogen returns to the soil from fine root mortality were 72 kg•ha−1•year−1 at the southern site and 54 kg•ha−1•year−1 at the northern site. Fine roots dominated total biomass and N litter inputs to the soil in both ecosystems, accounting for over 55% of total biomass and nearly 50% of total N returns. In both ecosystems, roots <0.5 mm comprised the bulk of fine root biomass and N pools, and the contribution of these roots to northern hardwood ecosystem carbon and nitrogen budgets may have been underestimated in the past.

scholarly journals The effect of mineral fertilization on belowground plant biomass of grassland ecosystems

2013 ◽  
Vol 61 (5) ◽  
pp. 1431-1440 ◽  
Author(s):  
Ján Tomaškin ◽  
Ján Jančovič ◽  
Ľuboš Vozár ◽  
Judita Tomaškinová
Keyword(s):  
Biomass Production ◽  
Mineral Nutrition ◽  
Aboveground Biomass ◽  
Root Biomass ◽  
Plant Biomass ◽  
Total Biomass ◽  
Mineral Fertilization ◽  
Mountain Area ◽  
Four Levels ◽  
Belowground Plant Biomass

Aim of the work was to determine the effect of different doses of mineral fertilization on belowground and aboveground plant biomass production of three different types of grasslands, to state R:S ratio (root:shoot) and turnover period of belowground plant biomass of grasslands. In the contribution, we assess production of underground biomass, tillering zone and aboveground biomass on three types of grasslands – permanent grassland (PG), over-sown grassland (OSG) and temporary grassland (TG) in sub-mountain area of central Slovakia. There were applied four levels of mineral nutrition in each grassland (non-fertilized variant, var. 30 kg.ha−1P and 60 kg.ha−1 K. var. 90 kg.ha−1 N + P30K60, var. 180 kg.ha−1 N + P30K60). The root biomass has the most significant share in the total biomass of grasslands (49.9–54.2 %), followed by tillering zone (33.3–36.0 %) and with the lowest share of aboveground biomass (11.9–16.8 %). A dominant share of root biomass and tillering zone ensure significant extra-productive functions of grasslands that contribute to the stability of agriculture landscape. We recorded the lowest amounts of root mass on TG (7.31 t.ha−1) and OSG (7.76 t.ha−1), the highest amounts on PG (8.52 t.ha−1). The specific nitrogen stimulating influence on root biomass production has been proven. Production of tillering zone was lower on OSG and TG (5.11 or 5.42 t.ha−1), significantly higher on PG (5.72 t.ha−1). We observed a significantly higher production of tillering zone with variants which were fertilized with nitrogen than on non-fertilized and PK fertilized. The lowest harvests of aboveground biomass were noticed on TG (5.80 t.ha−1), significantly higher on PG and OSG (6.35 or 6.54 t.ha−1). Mineral nutrition had a significant impact on production of aboveground biomass.R:S ratio of the assessed grasslands achieved the values from 4.02 to 5.16. Higher values on PG (5.16) are indicating its higher resistance to drought. Turnover time of root biomass was the longest on PG 3.5–5.0 years, on OSG and TG 2.5–3.5 years. Based on achieved results, we recommend using the fodder plants cultivation system on PG or OSG. Permanent grasslands are proved as ecologically more stable and more resistant to drought than temporary grasslands; they can together with optimal mineral nutrition provide adequate production of root biomass (8.5 t.ha−1) and a harvest of aboveground biomass (6.3 t.ha−1).

scholarly journals Effect of Density on Mediterranean Pine Seedlings Using the Nelder Wheel Design: Analysis of Biomass Production

2021 ◽  
Author(s):  
Irene Ruano ◽  
Celia Herrero ◽  
Felipe Bravo
Keyword(s):  
Biomass Production ◽  
Aboveground Biomass ◽  
Pinus Pinaster ◽  
Root Biomass ◽  
Pinus Halepensis ◽  
Belowground Biomass ◽  
Total Biomass ◽  
Production And Distribution ◽  
Mediterranean Pine ◽  
Positive Effect

Abstract BackgroundForest resilience should be improved to promote species adaptation and ensure the future of forests. Carbon stock is considered an indicator of resilience, so it is necessary to determine forest carbon stocks and how to improve them through forest management. The main objective of this study was to analyse biomass production and distribution among the components of four-year-old Pinus pinaster and Pinus halepensis trees. Young trees from a Nelder wheel experimental site were harvested and analysed. The effect of density could be included in the biomass analysis thanks to the Nelder wheel design. We tested densities from 1000 to 80000 seedlings/ha and analysed biomass by fitting different equations: (i) linear regressions to analyse biomass production; (ii) Dirichlet regressions to estimate the biomass proportions of each component and (iii) allometric equations to predict the biomass content of each component.ResultsResults from this innovative approach showed that density was a significant factor for Pinus halepensis. We observed a general increase of total biomass at lower densities and this positive effect increased root biomass proportion at the expense of aboveground biomass. Also, a new set of equations was developed for estimating above- and below-ground biomass in young Pinus pinaster and Pinus halepensis trees.Conclusionswe note the importance of belowground biomass and its value in total biomass production (approximately 20% of total biomass for both species). The effect of density on biomass production was only significant for Pinus halepensis, but the effect of density would have been different if root biomass had not been considered in the present study. Lower densities increased root biomass proportion at the expense of aboveground biomass. Currently, this positive effect is especially important in promoting management to improve tree resilience.

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