Seasonal dynamics of production, and nutrient accumulation and cycling by Phragmites asutralis (Cav.) Trin. ex Stuedel in a nutrient-enriched swamp in Inland Australia. I. Whole Plants

1989 ◽  
Vol 40 (5) ◽  
pp. 421 ◽  
Author(s):  
P.J. Hocking
Keyword(s):  
Standing Crop ◽  
Dry Matter ◽  
Plant Production ◽  
Dry Matter Production ◽  
Nutrient Accumulation ◽  
Ground Biomass ◽  
Matter Production ◽  
Whole Plant ◽  
Below Ground ◽  
Maximum Minimum

A study was made of the seasonal changes in dry matter production and patterns of nutrient accumulation by Phragmites australis in a nutrient-enriched swamp in inland Australia. The density of live shoots was highest (224 m-2) in October, but the peak standing crop of live shoots (9890 g m-2) occurred in early May. Peak below-ground biomass (21 058 g m-2) occurred in early August. Rhizome biomass constituted 75% of the below-ground biomass, and showed a distinct seasonal pattern. Net annual above-ground primary production (NAAP), estimated by the maximum-minimum method, was 9513 g m-2. Correction for shoot mortality and leaf shedding before, and production after, the maximum standing crop was attained increased NAAP to 12 898 g m-2. Whole plant production estimated by the maximum-minimum method was 9960 g m-2, and the corrected estimate was 14 945 g m-2. A model of dry-matter production indicated that translocation of carbohydrate from rhizomes could have provided 33% of the dry matter of shoots. About 23% of the dry matter of shoots was redistributed to below-ground organs during senescence. Concentrations of N, P, K, S, Cl and Cu declined, but concentrations of Ca, Mg, Na, Fe and Mn increased as shoots aged. Concentrations of N, P and Zn in rhizomes reached maxima in winter, and decreased in spring. Rhizomes usually contained the greatest quantity of a nutrient in the whole plant, and roots usually had less than 25% of the total plant content. There were seasonal fluctuations in the quantities of N, P, K, Zn and Cu in rhizomes. Nutrient accumulation by live shoots was underestimated by 22-55% using the maximum-minimum method. Nutrient budgets showed considerable internal cycling of N, P, K, S and Cu from rhizomes to developing shoots in spring, and from senescing shoots to rhizomes during autumn and winter.

Discrimination in Carbon Isotopes of Leaves Correlates With Water-Use Efficiency of Field-Grown Peanut Cultivars

1988 ◽  
Vol 15 (6) ◽  
pp. 815 ◽  
Author(s):  
GC Wright ◽  
KT Hubick ◽  
GD Farquhar
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Dry Matter Yield ◽  
Strong Negative Correlation ◽  
Matter Production ◽  
Whole Plant ◽  
Use Efficiency ◽  
The Relationship

Variation in water-use efficiency (W, g of total dry matter produced/kg water used), and its correlation with cultivar isotope discrimination in leaves (Δ) was assessed in peanut plants grown in small canopies in the field. Plants were grown in separate minilysimeters that were both embedded in the ground and positioned above the crop. Differences among cultivars were found in W and � and the relationship between W and Δ was compared for plants grown in open and closed canopies. Genetic variability in W in plants grown in the field under non-limiting water conditions was demonstrated, with Tifton-8, of Virginia habit, having the highest W (3.71 g/kg) and Rangkasbitung, an Indonesian cultivar of Spanish habit, the lowest (2.46 g/ kg). Variability in W was due to variation in total dry matter production more than that of water use. A strong negative correlation was found between Δ and W, and also between Δ and total dry matter. The relationship between whole plant W, including roots, and Δ was stronger than that between shoot W, without roots and Δ. The improvement occurred because of variation among cultivars in the root to shoot ratio. This highlights the importance of taking account of root dry matter in studies concerning W. There were significant differences in W and Δ between plants in pots above-ground compared to pots in the ground, with above-ground plants having significantly lower values of both W and Δ. The ranking of W and Δ among cultivars was not affected by the contrast in environment, which suggests these parameters are under strong genetic control. Total above-ground dry matter yield at maturity was negatively correlated with Δ, while pod yield was not. It appears a negative association between harvest index and Δ may exist; however not all cultivars used in this and other studies follow this response. Both water-use efficiency, Wand total dry matter production are negatively correlated with Δ in leaves of peanut plants grown in small canopies in the field. Measurement of Δ may prove a useful trait for selecting cultivars with improved W and total dry matter yield under field conditions.

Dry matter production and nutrient accumulation in Crotalaria spectabilis shoots

2019 ◽  
Vol 42 (6) ◽  
pp. 615-625 ◽  
Author(s):  
M. Mauad ◽  
R. S. Santana ◽  
T. H. Carli ◽  
F. Carli ◽  
A. C. T. Vitorino ◽  
...  
Keyword(s):  
Dry Matter ◽  
Dry Matter Production ◽  
Nutrient Accumulation ◽  
Matter Production ◽  
Crotalaria Spectabilis

Above- and below-ground net production in 40-year-old Douglas-fir stands on low and high productivity sites

1981 ◽  
Vol 11 (3) ◽  
pp. 599-605 ◽  
Author(s):  
Michael R. Keyes ◽  
Charles C. Grier
Keyword(s):  
Fine Roots ◽  
Dry Matter ◽  
Net Primary Production ◽  
Douglas Fir ◽  
Dry Matter Production ◽  
Net Production ◽  
High Productivity ◽  
Matter Production ◽  
Below Ground ◽  
Productivity Potential

Above- and below-ground net primary production was estimated for 40-year-old Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) stands growing on sites with apparently large differences in productivity potential. Aboveground net production was estimated from direct measurements of tree growth; belowground productivity was derived from data obtained by sorting live and dead roots from soil cores used in combination with measurements of root growth on observation windows.Aboveground net production was 13.7 t•ha−1 on the high productivity site and 7.3 t•ha−1 on the low productivity site. Belowground dry matter production on the high productivity site was 4.1 t•ha−1 compared with 8.1 t•ha−1 for the poorer site. On the more productive site, 8% of total stand dry matter production was in fine roots in contrast to over 36% on the poorer site. The difference in total net production (aboveground plus belowground) between the two sites was small (2.4 t•ha−1). Apparent differences in aboveground productivity may, to a large extent, result from the need for a greater investment in the fine roots on harsher sites.

scholarly journals Changes in selected production parameters and fatty acid composition of sunflower (Helianthus annuus, L.) in response to nitrogen and phosphorus applications

2008 ◽  
Vol 56 (5) ◽  
pp. 203-210 ◽  
Author(s):  
Petr Škarpa ◽  
Tomáš Lošák
Keyword(s):  
Fatty Acids ◽  
Seed Weight ◽  
Dry Matter ◽  
Oil Content ◽  
Oil Production ◽  
Plant Production ◽  
Dry Matter Production ◽  
Dry Matter Content ◽  
True Leaf ◽  
Matter Production

The effect of N and P fertilization on the dry matter content, concentration of nutrients (N, P, K, Ca and Mg) and their intake by the plant, production characteristics (achene yields, head diameter, 1000-seed weight, oil content and oil production) and the content of fatty acids (palmitic, stearic, palmitooleic, oleic, linoleic and linolenic) was evaluated in the one-year pot trial with sunflower (Helianthus an­nuus, L.). Nitrogen application had a positive effect on dry matter production and increased N intake by plants as early as the beginning of vegetation (4th true leaf). The effect of P on dry matter production was not markedly evident until the later growth stage (10th true leaf). At the end of the vegetation period the weight of plants of variants fertilised with N only and variants where P was applied evened out. Achene yields, head diameters, 1000-seed weight, oil content and oil production increased statistically significantly after N application. Of all the monitored characteristics the increased level of P in the soil affected only the 1000-seed weight. The application of both nutrients did not significantly change the content of fatty acids.

scholarly journals Produksi dan Kandungan Nutrien Beberapa Varietas Sorgum Hybrid dengan Jarak Tanam Berbeda sebagai Sumber Pakan

2019 ◽  
Vol 17 (1) ◽  
pp. 1-5
Author(s):  
Hajar Hajar ◽  
Luki Abdullah ◽  
Didid Diapari
Keyword(s):  
Biomass Production ◽  
Crude Protein ◽  
Dry Matter ◽  
Block Design ◽  
Plant Production ◽  
Crude Fiber ◽  
Dry Matter Production ◽  
Fresh Biomass ◽  
Matter Production

Sorghum feed is a type of cereal plant that has potential use as animal feed or forage. The reseach aim was to evaluate production and nutritional quality of some sorghum hybrid varieties, and determined the optimal spacing of sorghum plants. This research was arranged in a factorial randomized block design with 6 treatments and four replications. The first factor was the varieties of 12FS9006, 13FB7001 and 12S49001. The second factor was space of 25x25cm and 25x40 cm. The variables were fresh and dry matter of biomass production and also nutrient (ash, crude fiber, crude protein, Neutral Detergen Fiber and Acid Detergen Fiber. Sorghum varieties had significant effect (p<0.05) to fresh biomass production, dry matter biomass production, ash, crude ϐiber and crude protein). The space had a significant effect (p<0.05) to the dry matter production of biomass and crude fiber. The average variety of fresh biomass plant production was (18.90 tons ha-1), dry matter production of biomass was (4 ton ha-1), ash (5.51%), crude ϐiber (30.90%) and crude protein (8.45%). The average dry matter production was 4.34 tons ha-1 and crude ϐiber 29.96%. It can be concluded that the highest production and the best nutrient quality of sorghum hybrid was obtained at the sorghum variety of 12S49001, the distance of 25x25cm was the best plant space for hybrid sorghum production

scholarly journals Continuous and pulse fertigation on dry matter production and nutrient accumulation in coriander

DYNA ◽  
2020 ◽  
Vol 87 (212) ◽  
pp. 18-25
Author(s):  
Sirleide Maria de Menezes ◽  
Gerônimo Ferreira da Silva ◽  
Manassés Mesquita da Silva ◽  
José Edson Florentino de Morais ◽  
José Amilton Santos Júnior ◽  
...  
Keyword(s):  
Dry Matter ◽  
Coriandrum Sativum ◽  
Dry Matter Production ◽  
Nutrient Accumulation ◽  
Crop Evapotranspiration ◽  
Matter Production ◽  
Cu And Zn

This study aimed to evaluate the dry matter production and nutrient accumulation of coriander (Coriandrum sativum L.) under pulse and continuous fertigation depths. The experiment was conducted in randomized blocks in 2 x 5 factorial arrangement, with three replicates. Treatments consisted of two types of fertigation application (pulse and continuous) and five fertigation depths (40, 60, 80, 100 and 120% of crop evapotranspiration – ETc). Highest accumulations of dry matter, N, P, K, Fe, Mn, Cu and Zn were obtained with pulse fertigation. Pulse fertigation combined with depths lower than 100% ETc led to highest accumulations of K, Mn, Cu and Zn. The accumulation of nutrients decreased in the following order: K > N > Ca > P > Mg > S > Fe > Mn > Zn > Cu.

scholarly journals Dry matter production, chemical composition and nutrient accumulation in winter crops

2017 ◽  
Vol 12 (29) ◽  
pp. 2421-2426
Author(s):  
Ferreira Da Costa Poliana ◽  
Sérgio Rabello De Oliveira Paulo ◽  
Tiago Piano Jeferson ◽  
Egidio Taffarel Loreno ◽  
Ariel Melgarejo Arrúa Milciades ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Nutrient Accumulation ◽  
Matter Production ◽  
Winter Crops
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