Relationships between Cell‐Wall Fractions, Nitrogen, and Standing Crop in Aquatic Macrophytes

Polisini, J. M.; Boyd, Claude E.

doi:10.2307/1934237

Cited by 49 publications

(18 citation statements)

References 22 publications

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“…The order of decrease in mean annual concentration of nutrients were Ca > N > K > Mg > Na > P. The absorption of calcium in relation to potassium was like many other floating and submerged plants (Straskraba, 1968). Concentrations of calcium and magnesium were high and of phosphorus, potassium and sodium low as compared to the report of Boyd (1970) and Polisini & Boyd (1972), indicating a considerable amount of 'luxury consumption' (Gerloff, 1973).…”

Section: Discussionmentioning

confidence: 55%

Relationship of nutrients in water with biomass and nutrient accumulation of submerged macrophytes of a tropical wetland

Shardendu

Ambasht

1991

New Phytologist

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SUMMARVThe paper describes monthly hiomass, seasonal and annual net primary productivity and monthly and seasonal nutrient content of four submerged macrophytes in a lentic wetland situated in the campus of Banaras Hindu University. The seasonal variation of six nutrients (NO3 -N, PO,"-?, K, Ca, Mg, Na) in water is described and their mean concentrations used in multiple regression equations to examine the relationship between nutrients in water, plant biomass and nutrient accumulation in plant body. Hydrilla verticillata (L.f.) Royle, Potamogeton crispus L., P. pectinatus L. and Aponogeton natans (L.) Engle and Krause are the constituent species. Plants show rapid growth in post-monsoon and pre-winter months. All the four species showed biomass accumulation in the rainy season. The highest rate of production in the submerged zone was 0 73 g m~^ d"' and the mmimum was 0-29 g m"^ d"'. Maximum annual production of any species was 69 g m"" in P. pectinatus. In all the four species the nutrient concentration decreased in the following order: calcium > nitrogen > potassium > magnesium > sodium > phosphorus. Seasonal variation of nutrient content was dependent on the period of germination, growth and development of the species. Nitrogen, phosphorus and potassium were higher in the season of growth of particular species and calcium was higher when plants matured. There was no definite trend for sodium, though magnesium varied with species. Uptake and accumulation of nutrients in submerged plants largely depend upon nutrient concentration of water, except nitrogen which was also dependent on biomas change. Sources of nutrient for plants are both sediment and water. Translocation of potassium from the overlying water to the mud by Hydrilla plants is possible as there is reduction in potassium concentration of water around Hydrtlla.

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Section: Discussionmentioning

confidence: 55%

Relationship of nutrients in water with biomass and nutrient accumulation of submerged macrophytes of a tropical wetland

Shardendu

Ambasht

1991

New Phytologist

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“…It has been suggested that this pattern may result from differential rates of decomposition of different fractions (Visser 1964 ;Planter 1970 ;Boyd 1970Boyd , 1971Kaushik & Hynes 1971 ;Wetzel & Manny 1972) . Since the diphasic pattern seems to be particularly well developed in emergent and floating macrophytes (Boyd 1970(Boyd , 1971Mason & Bryant 1975 ;Howard-Williams & Junk 1976 ;Howard Williams & Howard-Williams 1978) it is probably partly related to the greater development of supporting and conducting tissue in these species (Polisini & Boyd 1972 ;HowardWilliams & Junk 1977) . Cynodon dactylon falls into this category, having stiff erect shoots bearing rather softer leaves .…”

Section: Discussionmentioning

confidence: 99%

Decomposition of Cynodon dactylon (L.) Pers. in the seasonally flooded areas of the Pongolo river floodplain: pattern and significance of dry matter and nutrient loss

Furness

Breen

1982

Hydrobiologia

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Cynodon dactylon meadows occupying seasonally inundated areas of the Pongolo river floodplain, South Africa, decompose during periods of submergence . The loss of dry matter and nutrients from both fresh and dried material enclosed in litter bags was studied . The pattern of loss of dry matter was diphasic . Loss was more rapid from dried than from fresh material, half the mass being lost in 18 and 28 days respectively . Nutrient loss followed an exponential pattern . Nitrogen, phosphorus and magnesium were lost more rapidly from dried than from fresh material whilst rates of loss of sodium, potassium and calcium were similar . The significance of Cynodon decomposition in the functioning of the floodplain is assessed from estimates of the above-and below-ground standing crop around one small lake before and after submergence . It is concluded that decomposition of plants growing in seasonally inundated areas of the floodplain may contribute significantly to the productivity of the system, but that the extent of the contribution can be greatly influenced by the flooding regime . The completion of the Pongolapoort dam upstream of the floodplain will alter the natural flooding pattern, effecting a reduction in floodplain productivity, unless a programme for flood release can be initiated .

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“…Because duckweed is only capable of spreading growth, there is no need for more supportive tissue at high densities. Polisini & Boyd (1972) measured standing crops and noncellwall fraction for 16 aquatic macrophytes and found the proportion of cell-wall material (00-noncellwall fraction) increased as standing crop increased. Results of the present research indicate that this trend is also interspecific, at least for plants with certain growth habits.…”

Section: Resultsmentioning

confidence: 99%

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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Relationships between Cell‐Wall Fractions, Nitrogen, and Standing Crop in Aquatic Macrophytes

Cited by 49 publications

References 22 publications

Relationship of nutrients in water with biomass and nutrient accumulation of submerged macrophytes of a tropical wetland

Relationship of nutrients in water with biomass and nutrient accumulation of submerged macrophytes of a tropical wetland

Decomposition of Cynodon dactylon (L.) Pers. in the seasonally flooded areas of the Pongolo river floodplain: pattern and significance of dry matter and nutrient loss

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

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