Effects of seasonality and plant density on the productivity of some freshwater macrophytes

DeBusk, Thomas A.; Ryther, John H.; Hanisak, M. Dennis; Williams, L.D.

doi:10.1016/0304-3770(81)90016-4

Cited by 53 publications

(19 citation statements)

References 5 publications

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“…The net changes of NO 2 -N, NH 3 -N, dON and pON in the medium during the growth were negligible (Table 5). These values are relatively smaller than 9.2 to 11.7 g dw m -2 d -1 , recorded earlier by some workers (Sharma 1990, DeBusk et al 1981, Fitzsimons and Vallejos 1986. Water hyacinth productivity in natural water is generally a function of its density and eutrophic state of the habitat.…”

Section: Resultsmentioning

confidence: 66%

Growth and Nutrient Accumulation by Eicchornia Crassipes (Mart.) Solms in Robertson Lake, Jabalpur, India

Jaiswal

2013

Ecoprint

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Macrophytes play an important role in nutrient dynamics of the lake ecosystem. The aim of this study is to determine the growth pattern and to evaluate the nutrient accumulation capacity of water hyacinth [Eichhornia crassipes (Mart) Solms] growing in Robrtson Lake, Jabalpur. The paper is outcome of in situ experiment conducted in Robertson lake (which has a dense mat of water hyacinth), as well as laboratory microcosms experiment. Water hyacinth grew at an average rate of 3.85 g dw m -2 d and it accumulates 263 kg N ha -1 yr -1 and 67 kg P ha -1 yr -1 , respectively. The chemistry of lake water does not show any significant seasonal variation; however the growth of water hyacinth in laboratory microcosms removed 79% of PO 4 -P and 58% NO 3 -N from the growth medium. Thus, the data reveal that water hyacinth stands growing in the lake highly buffered the water chemistry by reducing nutrient level, in spite of heavy nutrient load in the lake from domestic waste and factory effluent.

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Section: Resultsmentioning

confidence: 66%

Growth and Nutrient Accumulation by Eicchornia Crassipes (Mart.) Solms in Robertson Lake, Jabalpur, India

Jaiswal

2013

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“…Using an extrapolated value for productivity at 40 kg wet wt. m -2 from DeBusk et al (1980), similar calculations give crude protein production rates of 3.8 and 2.7 g protein m 2 day-at 10 and 40 kg wet wt. m-2 .…”

Section: Resultsmentioning

confidence: 65%

“…Lemna is not capable of'3-dimensional' growth as are Eichhornia and Pistia and once cultures become a continuous monolayer, plants cannot grow without overlapping and self-shading. The relationship of growth habit and culture density is also important in explaining differences in the potential productivity of Lemna and Eichhornia (DeBusk et al 1980). As vertical growth of Eichhornia and Pistia increased at higher densities, the proportion of cellwall material required to support this growth increased (Table 3).…”

Section: Resultsmentioning

confidence: 99%

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Relationships between culture density and the composition of three floating aquatic macrophytes

Tucker¹

1981

Hydrobiologia

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Eichhornia crassipes (Mart.) Solms, Pistia stratiotes (L.), and Lemna minor (L.) were cultured at four different densities each and analyzed for cell-wall fraction, crude protein, total available carbohydrate and ash. Cell-wall fraction increased and crude protein content decreased as density increased in Eichhornia and Pistia cultures. The cell-wall and crude protein content of Lemna did not change with increasing culture density. Differences in the trends of cell-wall and crude protein content of the three plants at increasing culture densities appear to be related to differences in growth form. There was no difference in the total available carbohydrate or ash content of the three species at different culture densities.

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“…Also, they reported a 7,500 lux as the optimum light intensity for duckweed growth. Although, the biomass yields of small-leaf floating macrophytes are quite lower than for large-leaf floating aquatic macrophyte such as Eichhornia crassipes or Piscia stratiotes [26], the ability of duckweeds to assimilate nutrients from culture medium has been reported by different authors as comparable [4,27]. …”

Section: Duckweed Growth and Nutrient Removalmentioning

confidence: 99%

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

Pena¹,

Oliveira²,

Fragoso³

et al. 2017

J. sustain. dev. energy water environ. syst.

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Over the last decades, phytodepuration has been considered an efficient technology to treat wastewaters. The present study reports a bench scale depuration assay of swine wastewater using Lemna minor. The highest observed growth rate obtained in swine wastewater was 3.1 ± 0.3 gDW m , respectively. The chemical oxygen demand removal efficiency in the swine wastewater assay was 58.9 ± 2.0%. Furthermore, the biomass valorisation by anaerobic co-digestion with swine wastewater was assessed. Results showed a clear improvement in specific methane production rate (around 40%) when compared to mono-substrate anaerobic digestion. The highest methane specific production, 131.0 ± 0.8 mL CH4 g −1 chemical oxygen demand, was obtained with a mixture containing 100 g of duckweed per liter of pre-treated swine wastewater. The water-nutrients-energy nexus approach showed to be promising for swine waste management.

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Effects of seasonality and plant density on the productivity of some freshwater macrophytes

Cited by 53 publications

References 5 publications

Growth and Nutrient Accumulation by Eicchornia Crassipes (Mart.) Solms in Robertson Lake, Jabalpur, India

Growth and Nutrient Accumulation by Eicchornia Crassipes (Mart.) Solms in Robertson Lake, Jabalpur, India

Relationships between culture density and the composition of three floating aquatic macrophytes

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

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