scholarly journals Spatial variability of leaf nutrient contents in a drip irrigated citrus orchard

2012 ◽  
Vol 32 (3) ◽  
pp. 479-489
Author(s):  
Robson A. Armindo ◽  
Rubens D. Coelho ◽  
Marconi B. Teixeira ◽  
Paulo J. Ribeiro Junior
Keyword(s):  
Spatial Variability ◽  
Laboratory Data ◽  
Citrus Orchard ◽  
Nutrient Contents ◽  
Calcium Magnesium ◽  
Minimum Distances ◽  
Macro And Micronutrients ◽  
Iron Manganese ◽  
Best Fit ◽  
Nitrogen Phosphorus

This study aimed to evaluate the spatial variability of leaf content of macro and micronutrients. The citrus plants orchard with 5 years of age, planted at regular intervals of 8 x 7 m, was managed under drip irrigation. Leaf samples were collected from each plant to be analyzed in the laboratory. Data were analyzed using the software R, version 2.5.1 Copyright (C) 2007, along with geostatistics package GeoR. All contents of macro and micronutrients studied were adjusted to normal distribution and showed spatial dependence.The best-fit models, based on the likelihood, for the macro and micronutrients were the spherical and matern. It is suggest for the macronutrients nitrogen, phosphorus, potassium, calcium, magnesium and sulfur the minimum distances between samples of 37; 58; 29; 63; 46 and 15 m respectively, while for the micronutrients boron, copper, iron, manganese and zinc, the distances suggests are 29; 9; 113; 35 and 14 m, respectively.

scholarly journals Effect of black point disease on quality of wheat grain

1970 ◽  
Vol 34 (2) ◽  
pp. 181-187 ◽  
Author(s):  
PK Malaker ◽  
IH Mian ◽  
KA Bhuiyan ◽  
MMA Reza ◽  
MA Mannan
Keyword(s):  
Fungal Pathogens ◽  
Dry Matter ◽  
Bipolaris Sorokiniana ◽  
Wheat Grain ◽  
Mineral Contents ◽  
Black Point ◽  
Nutrient Contents ◽  
Calcium Magnesium ◽  
Nitrogen Phosphorus

An experiment was conducted to determine the effect of different levels of black point infection caused by Bipolaris sorokiniana and other fungal pathogens on some quality characters of wheat grain. Wheat grains were graded on a 0-5 scale based on levels of black point infection. Quality characters of grain viz., protein, fat, dry matter, ash and mineral contents under different grades were determined following standard methods. The dry matter and ash contents of grain decreased while the contents of protein and fat increased with the increasing severity of black point infection. The observations on macro and micro nutrient contents of grain indicated that the amount of nitrogen, phosphorus, calcium, magnesium, sulphur, and boron increased, whereas the contents of potassium, iron, zinc, copper and sodium decreased with the increase of black point infection. However, the reductions in copper content of black point affected grains under different grades of infection were not significant as compared to apparently healthy grains. Key Words: Black point; Bipolaris sorokiniana; grain quality; wheat. DOI: 10.3329/bjar.v34i2.5789Bangladesh J. Agril. Res. 34(2) : 181-187, June 2009

Nutrient and biomass removals from a red spruce – balsam fir whole-tree harvest

1986 ◽  
Vol 16 (2) ◽  
pp. 381-388 ◽  
Author(s):  
C. T. Smith Jr. ◽  
M. L. McCormack Jr. ◽  
J. W. Hornbeck ◽  
C. W. Martin
Keyword(s):  
Unit Area ◽  
Glacial Till ◽  
Regression Equations ◽  
Nutrient Pools ◽  
Nutrient Contents ◽  
Calcium Magnesium ◽  
Evaluation Approaches ◽  
Nutrient Reserves ◽  
Nitrogen Phosphorus ◽  
Whole Tree

A mechanized whole-tree harvest was conducted on a watershed in central Maine dominated by Picearubens Sarg. and Abiesbalsamea (L.) Mill. The harvest removal and redistribution of biomass, nitrogen, phosphorus, calcium, magnesium, and potassium were estimated and evaluated with respect to estimates of site nutrient reserves. Regression equations were developed to estimate the nutrient contents and ovendry weight of the aboveground components of the Picearubens and Abiesbalsamea. Unit area estimates of nutrient and biomass removals were based on the application of the regression equations to a tally of all trees on twelve 0.04-ha square plots. Unit area estimates were made of exchangeable and total nutrients contained in the forest floor and glacial till above a hardpan. The harvest removed 90% of the biomass, 91 % of the nitrogen, phosphorus, potassium, and calcium, and 90% of the magnesium in the above-stump portions of the forest. These removals were from two to four times the amount of nutrients that would have been removed by a bole-only harvest, while increasing biomass removals by 1.4 times. The nutrients removed by the harvest were between 0.1 and 5% of the total soil reserves. Nutrient removals are evaluated in the context of three commonly used evaluation approaches: static comparisons of nutrient pools, nutrient input–output budgets, and computer simulation.

scholarly journals Testing and validation of DRIS for apple tree

2007 ◽  
Vol 64 (3) ◽  
pp. 288-294 ◽  
Author(s):  
Gilmar Ribeiro Nachtigall ◽  
Antonio Roque Dechen
Keyword(s):  
Apple Tree ◽  
Reference Group ◽  
Correlation Coefficients ◽  
Calcium Magnesium ◽  
Tree Leaf ◽  
Iron Manganese ◽  
The Relationship ◽  
Nitrogen Phosphorus ◽  
Nutritional Balance ◽  
Balance Index

To evaluate three procedures of the calculation of DRIS indices, as well as the efficiency of DRIS as a method for the interpretation of apple tree leaf analyses. This study uses data collected in apple producing areas of the Rio Grande do Sul and Santa Catarina States, Brazil. The concentrations of nitrogen, phosphorus, potassium, calcium, magnesium, boron, copper, iron, manganese, and zinc were determined in the leaf samples. The validation of the DRIS method used results of an experiment of potassium fertilization. The DRIS indices were calculated using two criteria for the choice of the ratio order of nutrients (F value ratio of variance of the relationships among nutrients between the reference group and the low productivity group, and R value - correlation coefficients between the productivity and the relationship between pairs of nutrients) and three forms of calculation of nutrient functions (methods of Beaufils, Jones and Elwali & Gascho). The Nutritional Balance Index (NBI) presented negative correlation with the productivity in all combinations. The DRIS method described by Elwali & Gascho, using the F value, presented a performance similar to the criterion of sufficiency range, and it can be used for the interpretation of foliar analysis of apple trees, because it presents values of the nutritional balance index that indicates the nutritional status of the plants, and for the efficiency in the nutritional diagnosis of the crop.

scholarly journals Physical and Biochemical Assessment of Sugarcane Bagasse (Saccharum Officinarum)

2019 ◽  
Vol 8 (12) ◽  
pp. 165-168
Keyword(s):  
Sugarcane Bagasse ◽  
Saccharum Officinarum ◽  
Proximate Analysis ◽  
Fiber Cells ◽  
Manganese Zinc ◽  
Mean Diameter ◽  
Calcium Magnesium ◽  
Iron Manganese ◽  
Biochemical Assessment ◽  
Nitrogen Phosphorus

Bagasse was milled into small size of 0.200152 mm volume surface mean diameter. The powder was found to be a rich source of many macro and micro nutrients, namely Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sulphur, Iron, Manganese, Zinc, and Copper. FTIR spectrum indicates the possible presence of polysaccharides like cellulose, lignin and hemicelluloses, and polyphenols in the bagasse sample. Micro-images of the bagasse obtained through SEM shows the features of fiber structures. The fiber cells are cross-linked and surface seems to be rough and thick-walled. The fiber pith was found to have pits at some places. Proximate analysis through EDX shows the high proportions of Carbon (44.51%) and Oxygen (55.49%).

Aspects of the Mineral Nutrition of the Western Australian Christmas Tree (Nuytsia floribunda (Labill.) R. Br.), With Special Reference to the Main Root

1980 ◽  
Vol 28 (4) ◽  
pp. 385 ◽  
Author(s):  
PJ Hocking
Keyword(s):  
Xylem Sap ◽  
Outer Zone ◽  
Fruit Production ◽  
Main Root ◽  
Concentration Gradients ◽  
Nitrogen And Phosphorus ◽  
Manganese Zinc ◽  
Calcium Magnesium ◽  
Iron Manganese ◽  
Nitrogen Phosphorus

A study was made of the shape, dimensions and possible nutritional significance of the main root of the hemi parasite Nuytsia floribunda. Levels of nitrogen, phosphorus, potassium, sulfur, calcium, magnesium, sodium, iron, manganese, zinc and copper were determined in the main root: haustoria, xylem sap, mucilage, trunk and leaves. The main root was approximately turnip-shaped and there was no evidence of a tap-root. Haustoria were confined to the top 15-20 cm of the soil and were attached to a variety of woody and herbaceous host plants. Haustoria contained the highest levels of nitrogen and phosphorus, the trunk and main root the highest levels of calcium, magnesium and sodium. Potassium and sodium accounted for 75% of the minerals in xylem sap. calcium and magnesium for 60% of the minerals in mucilage which exuded from wounds in the main root. Concentration gradients of most minerals existed across the main root. Nitrogen, phosphorus, potassium, sulfur and sodium were more concentrated in the outer zone of the root, calcium, magnesium, manganese and copper in the central part. Nuytsia appears to draw on stored nutrients in some situations. Conservative estimates suggested that nutrient reserves in the main root could not provide the amounts required for flower and fruit production. It was concluded that reproductive and vegetative growth draws on reserves in organs other than the main root and the extensive lateral root system may be important in this respect.

scholarly journals Nutritional status of coriander under fertigation depths and pulse and continuous drip irrigation

2020 ◽  
Vol 24 (6) ◽  
pp. 364-371
Author(s):  
Sirleide M. de Menezes ◽  
Gerônimo F. da Silva ◽  
Valentin R. Ó. Zamora ◽  
Manassés M. da Silva ◽  
Anna C. R. A. da Silva ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Drip Irrigation ◽  
Block Design ◽  
Randomized Block Design ◽  
Zinc Concentrations ◽  
Calcium Magnesium ◽  
Iron Manganese ◽  
Nitrogen Phosphorus ◽  
Iron And Manganese ◽  
Continuous Drip

ABSTRACT The objective of this study was to evaluate the nutritional status of coriander cultivar Verdão under fertigation depths and pulse and continuous drip irrigation. The experiment was conducted in a protected environment at the Universidade Federal Rural de Pernambuco, Recife, PE, Brazil (8° 1’ 6.50” S, 34° 56’ 46” W and altitude of 6.5 m), in the randomized block design in 2 x 5 factorial scheme, with three repetitions. Treatments consisted of five irrigation depths (40, 60, 80, 100 and 120% of crop evapotranspiration - ETc) and two types of fertigation application (pulse and continuous). At 27 days after sowing, the aerial part of 48 plants per plot was collected for subsequent quantification of nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, copper and zinc concentrations. Pulse fertigation combined with ETc replacement depths below 100% promoted higher leaf concentrations of phosphorus, sulfur, iron and manganese. Continuous fertigation combined with 100% ETc depth induced sulfur deficiency in the crop and, combined with 40% ETc depth, promoted the highest calcium concentration. Regardless of the type of application, ETc replacement depths from 82.7 and 40% provide adequate leaf concentrations of nitrogen and magnesium, respectively. Regardless of the applied depth, pulse fertigation reduced the leaf concentrations of magnesium.

A comparison of zulu sorghum, bulrush millet and white panicum in terms of yield, forage quality and milk production

1975 ◽  
Vol 15 (73) ◽  
pp. 211 ◽  
Author(s):  
TH Stobbs
Keyword(s):  
Milk Production ◽  
Nutritive Value ◽  
Mature Stage ◽  
Tropical Pastures ◽  
Dry Matter Digestibility ◽  
Large Bulk ◽  
Feeding Value ◽  
Calcium Magnesium ◽  
Nitrogen Phosphorus

Yield and nutritive value of three summer annual forages, hybrid forage sorghum (Sorghum spp. hybrid cv. Zulu), bulrush millet (Pennisetum typhoides cv. Tamworth) and white panicum millet (Echinochloa crusgalli var. edulis) were determined in three experiments. Uninterrupted growth was measured every 2 weeks between 4 and 12 weeks after sowing, and leaf, stem and inflorescence components analysed for nitrogen, phosphorus, calcium, magnesium, sodium and potassium and dry matter digestibility by an in vitro technique. The value of 10-week-old herbage, from crops grown with 50 kg ha-1 N, was determined by grazing with 18 Jersey cows and by feeding chopped material to 12 cows indoors. White panicum was the lowest yielding forage (up to 6,360 kg ha-1 at 10 weeks) but contained the highest concentration of nitrogen, phosphorus, calcium and magnesium in both leaf and stem fractions at all stages of growth. After 10 weeks growth this feed contained a high proportion of seed and was eaten in arger quantities than zulu sorghum or bulrush millet. Cows grazing white panicum produced the highestr lmilk yields (6.5 and 7.1 kg cow-1 day-1 indoors and grazed) and milk from these cows contained a highe solids-not-fat and protein content than milk from cows fed bulrush millet or sorghum. Zulu sorghum was highest yielding (1 1,240 kg ha-1 at 12 weeks in experiment 1 and 81 50 kg ha-1 at 10 weeks in experiment 2). With advancing maturity stem content increased (>80 per cent from 8 weeks onwards) and the nitrogen content of both leaf and stem fractions rapidly declined to sub-optimum levels. Milk production of cows feeding on zulu sorghum was low, averaging 4.7 and 6.0 kg cow-1 day-1 for indoor and grazing experiments. Bulrush millet produced high forage yields with a higher leaf content than zulu sorghum and milk yields were higher. Butterfat content of milk from cows feeding on bulrush millet was lower than when cows were fed the other forages. It was concluded that these three forages are capable of providing a large bulk of feed but their feeding value at a semi-mature stage of growth is similar to perennial tropical pastures.

scholarly journals CHEMICAL COMPOSITION OF WHOLE GRAINS IN COMMON BEANS LANDRACES AND BREEDING GENOTYPES

2015 ◽  
Vol 2 ◽  
pp. 81 ◽  
Author(s):  
Gilberto Antonio Peripolli Bevilaqua ◽  
Iraja Ferreira Antunes
Keyword(s):  
Nutritional Composition ◽  
Whole Grain ◽  
Breeding Programs ◽  
Breeding Lines ◽  
Manganese Zinc ◽  
Nutritional Characteristics ◽  
Calcium Magnesium ◽  
The Common ◽  
Iron Manganese ◽  
Insoluble Fiber

The common bean has been object of breeding programs aiming the development of new cultivars adapted to varied production system and shown differentiated nutritional characteristics. Due a genetic diversity existent the landraces can be used directly for cropping, for present characteristics desirable. Little information exists about mineral content and other quality traits for those bean landraces. The aim of this paper was to verify the variability for grain nutricional caracters in breeding cultivars and landraces of bean from Rio Grande do Sul state, Brazil. The experiment was conducted in 2009/2010 in Experimental Station Cascata, of Embrapa Temperate Agriculture. In whole grain of 54 bean genotypes with black and no black coat were determined macroelements (nitrogen, phosphorus, potash, calcium, magnesium and sulfur), oligoelements (iron, manganese, zinc and cuprum), protein and ash content, insoluble fiber, digestive nutrient and antioxidant astragalina. The results shown that the landraces varieties presents nutritional composition of macro and oligoelements, fibers, protein and ash contents in whole grain similar than that of breeding lines and cultivars. The black coat grain from breeding programs showed better nutritional quality for macro and oligoelements content than coloured grain, highlighting TB 02-04 e TB 01-01. The landraces with coloured grains TB 02-26, TB 02-24 and TB 03-13 showed the high levels of astragaline.

scholarly journals Assessment of Water Quality Index for the Groundwater in Tumkur Taluk, Karnataka State, India

2009 ◽  
Vol 6 (2) ◽  
pp. 523-530 ◽  
Author(s):  
C. R. Ramakrishnaiah ◽  
C. Sadashivaiah ◽  
G. Ranganna
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Total Dissolved Solids ◽  
Physicochemical Analysis ◽  
Total Hardness ◽  
Dissolved Solids ◽  
Groundwater Samples ◽  
Calcium Magnesium ◽  
Iron Manganese

The present work is aimed at assessing the water quality index (WQI) for the groundwater of Tumkur taluk. This has been determined by collecting groundwater samples and subjecting the samples to a comprehensive physicochemical analysis. For calculating the WQI, the following 12 parameters have been considered: pH, total hardness, calcium, magnesium, bicarbonate, chloride, nitrate, sulphate, total dissolved solids, iron, manganese and fluorides. The WQI for these samples ranges from 89.21 to 660.56. The high value of WQI has been found to be mainly from the higher values of iron, nitrate, total dissolved solids, hardness, fluorides, bicarbonate and manganese in the groundwater. The results of analyses have been used to suggest models for predicting water quality. The analysis reveals that the groundwater of the area needs some degree of treatment before consumption, and it also needs to be protected from the perils of contamination

Growing season changes in the concentration and distribution of macroelements in Willamette red raspberry plant parts

1994 ◽  
Vol 74 (4) ◽  
pp. 833-839 ◽  
Author(s):  
C. G. Kowalenko
Keyword(s):  
Dry Matter ◽  
Rubus Idaeus ◽  
Tissue Analysis ◽  
Plant Analysis ◽  
Red Raspberry ◽  
Plant Parts ◽  
Fertilizer Recommendations ◽  
Calcium Magnesium ◽  
Nitrogen Phosphorus ◽  
Key Words Nitrogen

Nitrogen, P, K, Ca, Mg and Na concentrations and accumulations in Willamette red raspberry (Rubus idaeus L.) plant parts were measured in a field study to identify a potential plant-analysis-based method for evaluating site-specific fertilizer requirements. Dry matter and macroelements accumulated steadily in new canes over the season, increased early to a stable amount in floricane laterals and ripe berries, increased and then decreased in leaves and remained stable in stems. Macroelement accumulation patterns were generally similar to dry matter accumulations. The amounts of N and K that accumulated in ripe berries were similar and about eight times greater than P, Ca and Mg. Macroelement concentrations of floricane stems, laterals and berries were more stable than in leaves, making them potentially more suitable than leaves for developing tissue analysis for fertilizer recommendations. Key words: Nitrogen, phosphorus, potassium, calcium, magnesium, sodium, Rubus idaeus

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