scholarly journals Partitioning of macronutrients and nutritional efficiency in fertigated prata banana

2020 ◽  
Vol 42 (4) ◽  
Author(s):  
José Aridiano Lima de Deus ◽  
Júlio César Lima Neves ◽  
Antonio João de Lima Neto ◽  
William Natale ◽  
Víctor Hugo Alvarez V ◽  
...  
Keyword(s):  
Dry Matter ◽  
Nutritional Management ◽  
Historical Survey ◽  
Parent Plant ◽  
Plant Organ ◽  
Annual Productivity ◽  
Nutrient Partitioning ◽  
Fruit Productivity ◽  
Average Distribution ◽  
Partitioning Pattern

Abstract Adequate nutritional management of any plant species requires quantifying the nutrients accumulated in the plant and knowing their allocation in the different organs. The objective of this study was to evaluate the partitioning, accumulation, export of macronutrients and the nutritional efficiency of fertigated Prata banana plants. A historical survey of annual fruit productivity was conducted in 66 plots of Prata banana, selecting four that met the annual productivity classes (< 30.0; 30.0 = 37.5; 37.5 = 45.0 and > 45.0 t ha-1). The dry matter weights of the different organs of parent plant and follower, as well as the respective contents of macronutrients, were used to estimate the accumulation, partitioning, export, sequence of accumulation of macronutrients and nutritional efficiency using the coefficient of biological utilization (CBU). The partitioning of macronutrient accumulation varied with productivity class and plant organ. The average distribution of nutrients in the parent plant and in the follower ranged from 67.5 to 82.8 % and from 17.2 to 32.5 %, respectively. Macronutrient exports per ton of bunch were 4.334, 1.660, 0.361, 0.224, 0.148 and 0.119 kg t-1 for K, N, P, Mg, S and Ca, respectively. Banana mats have a nutrient partitioning pattern for different yields, that is, this work provides evidence that there is an “ideal compartmentalization” that promotes higher productivity; however, more research is needed to support this statement. The most exported nutrients per ton of bunch were K and N. The descending order of accumulation was: K > N > Ca > Mg > P > S. It was observed that the CBUs of N and P were less sensitive to productivity variations, while those of Ca and Mg were the most sensitive.

The relationship between protein nutrition, reproductive effort and breakdown in immunity toTeladorsagia circumcinctain periparturient ewes

2001 ◽  
Vol 72 (3) ◽  
pp. 595-606 ◽  
Author(s):  
J.G. M. Houdijk ◽  
I. Kyriazakis ◽  
F. Jackson ◽  
R. L. Coop
Keyword(s):  
Host Resistance ◽  
Dry Matter ◽  
Reproductive Effort ◽  
Late Pregnancy ◽  
Gastrointestinal Nematodes ◽  
Dry Matter Intake ◽  
Teladorsagia Circumcincta ◽  
Nutrient Partitioning ◽  
Ad Libitum ◽  
The Relationship

AbstractA nutritional hypothesis for the occurrence of the periparturient relaxation of immunity (PPRI) to gastrointestinal nematodes was tested within the bounds of a nutrient partitioning framework. It was hypothesized that at times of a scarce supply of metabolizable protein (MP), an increase in MP supply or a reduction in MP demand (having singles instead of twins) should lower the extent of PPRI in sheep. Twenty-one single- and 21 twin-bearing and -rearing Finn-Dorset ewes, 2 to 7 years old, and repeatedly infected withTeladorsagia circumcincta, were given one of three pelleted foods (no. = 7). The foods were formulated to supply 0·8 (L), 1·0 (M) and 1·2 (H) times the MP requirements during lactation, and were offeredad libitumfrom d–21to d35(d0 is day of parturition). Faecal egg counts (FEC) were assessed twice weekly as an indicator for host resistance. Dry-matter intake (DMI) during late pregnancy was higher than expected, and MP supply did not limit performance at this stage. In accordance with the hypothesis, there were no indications of a breakdown of immunity toT. circumcinctaduring late pregnancy. DMI during lactation did not differ between the single- and twin-rearing ewes. Calculated milk production was lower for the L than for the M and H ewes, especially for the twin-rearing ewes. A temporarily elevated FEC was observed during the first few days in lactation, which was probably mainly due to changes in faecal output rather than to PPRI. The FEC returned to low, late pregnancy levels at d12and remained low for the single- but not for the twin-rearing ewes (P< 0·001). Overall, the L ewes had higher FEC than the M and H ewes from d19onwards; this effect was more pronounced for the twin- than for the single-rearing ewes. It was postulated that DMI achieved overcame MP scarcity and thus prevented breakdown in immunity in the single-rearing ewes. The data support the view that, at times of MP scarcity, an increase in MP supply and reduction in MP demand can lower the extent of the breakdown in immunity towardsT. circumcincta.

scholarly journals Chickpea production in response to fertilization with zinc and doses of phosphorus

2020 ◽  
Vol 11 ◽  
pp. e3106
Author(s):  
Jorge Henrique dos Santos Fonseca ◽  
Maria Nilfa Almeida Neta ◽  
Rodinei Facco Pegoraro ◽  
Gbison Ferreira de Almeida ◽  
Cândido Alves da Costa ◽  
...  
Keyword(s):  
Dry Matter ◽  
Maximum Yield ◽  
Tropical Soils ◽  
Plant Residues ◽  
Nutritional Management ◽  
Agronomic Efficiency ◽  
Zn Addition ◽  
Higher Doses

Chickpea cultivation in Brazil has not yet been consolidated, and studies aiming at the adequate nutritional management for this crop are necessary. This work aimed to evaluate the production of chickpea plants (cultivar BRS Aleppo) subjected to fertilization with zinc and P doses. The experimental was completely randomized, with four replications, in a 3 x 5 factorial scheme, corresponding to three fertilization treatments with Zn (without Zn addition; 50% of Zn applied at sowing, via soil + 50% applied at flowering, via leaves; and 100% applied at sowing, via soil) and five doses of phosphorus (0, 60, 120, 180, and 240 kg ha-1 of P2O5). The 100-grain mass (M100), pod mass (MV), number of pods (NV), number of grains (NG), total grain mass (MGT), yield (PROD), dry matter of the shoot part (MSPA) and plant residues (MSRV), and agronomic efficiency (EA) were characterized. There was an isolated effect of the P doses on the M100, MGT, PROD, MSPA, and MSRV characteristics. The application of 240 kg ha-1 resulted in an increase in the production components and a maximum yield of 3,018 kg ha-1, indicating the need to adopt higher doses of P2O5 to increase chickpea production in tropical soils. However, the highest agronomic efficiency was obtained after the application of 60 kg ha-1 of P2O5, along with Zn at sowing.

scholarly journals Dry matter and nutrient partitioning in Castor plants in two growing seasons

Científica ◽  
2017 ◽  
Vol 45 (1) ◽  
pp. 41
Author(s):  
Martha Nascimento Castro ◽  
Carlos Alexandre Costa Crusciol ◽  
Adalton Mazetti Fernandes ◽  
Antonio Carlos De Almeida Carmeis Filho ◽  
Rodrigo Martinez Castro
Keyword(s):  
Dry Matter ◽  
Growing Seasons ◽  
Nutrient Partitioning

scholarly journals Agronomic performance of Urochloa brizantha cv. Marandu cultivated in clayey and sandy soil submitted to water and nutritional management

2021 ◽  
Vol 29 ◽  
pp. 179-191
Author(s):  
Marco Antônio Alves Ferreira ◽  
Rodrigo Esser ◽  
Gilmar Oliveira Santos ◽  
Rose Luiza Moraes Tavares
Keyword(s):  
Sandy Soil ◽  
Soil Texture ◽  
Dry Matter ◽  
Principal Component ◽  
Leaf Length ◽  
Neutral Detergent Fiber ◽  
Nutritional Management ◽  
Agronomic Performance ◽  
Crop Performance ◽  
Urochloa Brizantha

Water and nutrient supply, as well as the soil texture, are some of the challenges that affect forage yield. Therefore, the objective of this work was to evaluate the agronomic performance of Urochloa brizantha cv. Marandu cropped in clayey and sandy soil submitted to water and nutritional management, in the municipality of Rio Verde, State of Goiás. The treatments consisted of a combination of soil with two textural classes (clayey and sandy), two levels of fertilization (A1: 30; 7 and 36 and A2: 45; 10.5 and 54 NPK per Mg DM, respectively), and seven water depths (0%, 25%, 50%, 75%, 100%, 125% and 150% of the crop evapotranspiration (ETc)), in four replicates. Crop performance was evaluated using SPAD index, plant height, leaf length, leaf width, leaf/stem ratio, crude protein, neutral detergent fiber, and dry matter. The data were subjected to multivariate data analysis. The principal component analysis allowed to observe that the first principal component explained 68.94% of the data, being characterized for promoting the best crop performance in relation to leaf length and width, characteristics that reflect in the other assessed variables. Forage performed poorly in winter because of the limitation of the climatic conditions. A higher yield was observed in the dry matter submitted to depths greater than 100% of ETc, regardless of the soil texture and the level of fertilization.

Phosphorus and Carbon Budgets of Eucalyptus pilularis Smith Seedlings During Their Cotyledonary Phase of Growth

1985 ◽  
Vol 12 (5) ◽  
pp. 535 ◽  
Author(s):  
DR Mulligan ◽  
JW Patrick
Keyword(s):  
Seedling Growth ◽  
Dry Matter ◽  
Soil Phosphorus ◽  
Phosphorus Acquisition ◽  
Carbon Distribution ◽  
Phosphate Ion ◽  
Eucalyptus Pilularis ◽  
Available Soil Phosphorus ◽  
Partitioning Pattern ◽  
Phosphorus Export

The budgeting of phosphorus and carbon in Eucalyptus pilularis Smith seedlings raised in a phosphorus-deficient sandy podzol was examined for the first 35 days of seedling growth. During this period, the photosynthetic cotyledons were a major source of both phosphorus and carbon. At 7 days from sowing, the cotyledons were gross importers of assimilated phosphorus but switched to gross (day 15) and then net (day 20) export in response to the current rate of phosphorus acquisition and the phosphorus demand by other organs. However, the cotyledons retained the capacity to revert to phosphorus import. This strategy would permit the seedlings to take advantage of any favourable fluctuations that may occur in soil phosphorus supply. Initial cotyledonary phosphorus export was directed basipetally to the roots and soil. From 20 days after sowing the partitioning pattern altered, with exported phosphorus moving solely to the expanding leaves. Carbon exported from the cotyledons initially supplied all sinks although, once the first leaf pair was self-supportive for carbon, the roots and stem received a higher proportion of exported cotyledonary carbon. The efficiency of phosphorus redistribution was considered to minimize the consequences of a rapidly depleted pool of readily available soil phosphorus on seedling growth. The seedlings also possessed a strategy of maximizing the investment of carbohydrate into dry matter by keeping respiratory losses to a minimum. A proposed link between the distribution of the limiting phosphate ion and carbon distribution may be a contributing factor to the success of E. pilularis in the phosphorus-deficient soil.

VIABILITY OF RUMEX CRISPUS SEEDS HARVESTED AT DIFFERENT STAGES OF MATURITY

1974 ◽  
Vol 54 (3) ◽  
pp. 547-552
Author(s):  
M. A. MAUN
Keyword(s):  
Dry Matter ◽  
Progressive Increase ◽  
Parent Plant ◽  
Rumex Crispus ◽  
Physiological Maturity ◽  
Developing Seeds ◽  
Viable Seeds ◽  
Days After Anthesis

Seeds of Rumex crispus (curled dock) collected from the parent plants at different stages of maturity exhibited a progressive increase in germination with increased maturity. The seeds reached physiological maturity 18 days past anthesis. After-ripening of seeds did not alter their germinability. The seeds enclosed in the perianth segments produced higher germination values than naked seeds, probably because the green perianth segments continue to provide photosynthates to the developing seeds. Panicles severed from the parent plant and placed among mowed herbage or buried in the soil produced viable seeds even when they were clipped 2–6 days after anthesis. However, panicles of the same age dried immediately after harvest failed to produce any viable seeds. The dry matter (DM) content of seeds increased until 30 days after anthesis, then levelled off.

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