Fertilization during the establishment of a Eucalyptus camaldulensis plantation in the northern Brazilian Amazon.

Forestry plantations should be regarded as an alternative sustainable land-use system in degraded savannah areas. They contribute to the maintenance of productive processes in degraded soils that are of economic importance for local inhabitants; in addition, in the ecological sense, timber and non-timber products from planted forests reduce the exploitation pressure on native forests. Eucalyptus plantations on degraded savannahs in the northern Brazilian Amazon may help to reduce exploitation pressure on native forests. However, there is no information regarding the nutrients rates that would allow faster eucalyptus growth in that region. A trial was installed in an Yellow Latosol (Oxisol) soil type adopting a one-half-type fractional factorial design with four ates of N, P, and K. Functions were adjusted for the dependent variables height, diameter at breast height (DBH), leaf tissue nutrient content, and soil-chemical attributes. Interaction N versus K was observed on tree height with a maximum of 7.8 m recorded at 200 kg ha-1 of N and 50 kg ha-1 of K. Phosphorus fertilization promoted greater DBH growth with maximum value at 120 kg ha-1 of P; however, the highest gain was obtained at 30 kg ha-1 of P. The NPK rates that maximized Eucalyptus camaldulensis growth were 200, 30, and 50 kg ha-1, respectively.

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Crescimento e desenvolvimento de Hemerocallis fulva submetidos a doses de nitrogênio e fósforo

Ornamental Horticulture ◽

10.14295/oh.v21i3.738 ◽

2015 ◽

Vol 21 (3) ◽

pp. 351

Author(s):

Francimar Perez Matheus da Silva ◽

Graziane Maria Giacon ◽

Jackeline Schultz Soares ◽

Yara Brito Chaim Jardim Rosa ◽

Derek Brito Chaim Jardim Rosa ◽

...

Keyword(s):

Root System ◽

Plant Root ◽

Leaf Tissue ◽

Nutrient Content ◽

Dry Mass ◽

Phosphorus Fertilization ◽

Nitrogen And Phosphorus ◽

Coverage Area ◽

P Content ◽

Plant Root System

The objective was to evaluate the effect of different doses of nitrogen and phosphorus on growth and development of Hemerocallis fulva variety Flore Full, herbaceous perennial widely used in landscaping. The experimental design was randomized blocks with 25 treatments, arranged in a factorial 5 x 5 (0; 75; 150; 225 and 300 kg ha-1 N and 0, 100, 200, 300 and 400 kg ha-1 P), with 4 replicates. The phosphorus fertilization was carried out 15 days after planting (DAP) and nitrogen was applied in coverage divided in three equal applications at 15, 120 and 240 DAP. There were evaluated the plant height, number of tillers per plant, soil coverage area, the fresh mass of plant, root system and shoot; and the dry mass of plant, root system and aerial part, and calculated the ratio of root dry mass and plant dry mass. It was also obtained the nutrient content of the leaf tissue and root system. The highest tillering was gained with the use of 150 kg ha-1 N combined with 400 kg ha-1 of P. Intermediate doses of N (75-170 kg ha-1 of N) showed higher production of plant fresh and dry mass and root dry mass. Doses of N and P influenced the N and P content in plant tissues of roots and leaves of Hemerocallis. Plants fertilized with 300 kg ha-1 of N and 273 kg ha -1 of P lead to the highest levels of N in the leaves and doses of 80 kg ha-1 of N and 68 kg ha-1 P, the highest content of P in the leaves of H. fulva. Already, in the roots, the highest N content was obtained with application of 300 kg ha-1 N in the presence of P and doses of 225 kg N ha-1 combined with 300 ha-1 P provided the highest P content in the roots.

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Identification of sensitive indicators to assess the interrelationship between soil quality, management practices and human health

SOIL ◽

10.5194/soil-1-173-2015 ◽

2015 ◽

Vol 1 (1) ◽

pp. 173-185 ◽

Cited By ~ 122

Author(s):

R. Zornoza ◽

J. A. Acosta ◽

F. Bastida ◽

S. G. Domínguez ◽

D. M. Toledo ◽

...

Keyword(s):

Land Use ◽

Human Health ◽

Soil Quality ◽

Management Practices ◽

Land Use Changes ◽

Aggregate Stability ◽

Health Indicators ◽

Nutrient Content ◽

Sustainable Land Use ◽

Soil Quality Index

Abstract. Soil quality (SQ) assessment has long been a challenging issue, since soils present high variability in properties and functions. This paper aims to increase the understanding of SQ through the review of SQ assessments in different scenarios providing evidence about the interrelationship between SQ, land use and human health. There is a general consensus that there is a need to develop methods to assess and monitor SQ for assuring sustainable land use with no prejudicial effects on human health. This review points out the importance of adopting indicators of different nature (physical, chemical and biological) to achieve a holistic image of SQ. Most authors use single indicators to assess SQ and its relationship with land uses – soil organic carbon and pH being the most used indicators. The use of nitrogen and nutrient content has resulted sensitive for agricultural and forest systems, together with physical properties such as texture, bulk density, available water and aggregate stability. These physical indicators have also been widely used to assess SQ after land use changes. The use of biological indicators is less generalized, with microbial biomass and enzyme activities being the most selected indicators. Although most authors assess SQ using independent indicators, it is preferable to combine some of them into models to create a soil quality index (SQI), since it provides integrated information about soil processes and functioning. The majority of revised articles used the same methodology to establish an SQI, based on scoring and weighting of different soil indicators, selected by means of multivariate analyses. The use of multiple linear regressions has been successfully used for forest land use. Urban soil quality has been poorly assessed, with a lack of adoption of SQIs. In addition, SQ assessments where human health indicators or exposure pathways are incorporated are practically inexistent. Thus, further efforts should be carried out to establish new methodologies to assess soil quality not only in terms of sustainability, productivity and ecosystem quality but also human health. Additionally, new challenges arise with the use and integration of stable isotopic, genomic, proteomic and spectroscopic data into SQIs.

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Effect of NPK fertilization on production and leaf nutrient content of eucalyptus minicuttings in nutrient solution

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832011000100023 ◽

2011 ◽

Vol 35 (1) ◽

pp. 249-254

Author(s):

José Pereira Carvalho Neto ◽

Enilson de Barros Silva ◽

Reynaldo Campos Santana ◽

Paulo Henrique Grazziotti

Keyword(s):

Experimental Design ◽

Nutrient Solution ◽

Plant Material ◽

Management Practice ◽

Dry Weight ◽

Nutrient Content ◽

Fractional Factorial ◽

Nutrient Contents ◽

Adequate Nutrient ◽

Npk Fertilization

Adequate nutrient levels in plants vary according to the species or clone, age and management practice. Therefore, adjustments of the nutrient solution are often necessary according to the plant material for multiplication. This study aimed to evaluate the influence of NPK fertilization on production and leaf nutrient contents of eucalyptus cuttings in nutrient solution. The study was conducted from November 2008 to January 2009 in a greenhouse. The experimental design was completely randomized fractional factorial (4 x 4 x 4)½, with a total of 32 treatments with three replications. The treatments consisted of four doses of N (50, 100, 200 and 400 mg L-1) as urea, P (7.5, 15, 30 and 60 mg L-1) in the form of phosphoric acid and K (50, 100, 200 and 400 mg L-1) in the form of potassium chloride in the nutrient solution. Only the effect of N alone was significant for the number and dry weight of minicuttings per ministump, with a linear decreasing effect with increasing N levels. The highest number of cuttings was obtained at a dose of 50, 7.5 and 50 mg L-1 of N, P and K, respectively.

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Effect of Different Levels of Phosphorus, Phosphorus Solubilising Bacteria and Farmyard Manure on Nutrient Content and Uptake by Bt-Cotton

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2021/v33i1030469 ◽

2021 ◽

pp. 17-27

Author(s):

K. V. S. L. Raj Rushi ◽

P. Prasuna Rani ◽

P. R. K. Prasad ◽

P. Anil Kumar

Keyword(s):

Block Design ◽

Farmyard Manure ◽

Nutrient Content ◽

Inorganic Phosphorus ◽

Phosphorus Fertilization ◽

Growth Stages ◽

Bt Cotton ◽

Constant Weight ◽

Plant Samples ◽

Randomized Block Design

Aim: To determine the effect of integrated use of inorganic phosphorus along with phosphorus solubilising bacteria and farmyard manure on nutrient Content and uptake in Bt-Cotton. Study Design: The experiment was laid out in randomized block design with three replications. Place of Study: At College Farm, Agricultural College, Bapatla, Guntur district. Methodology: After the preliminary layout, the Tulasi-BG II hybrid of cotton was used as a test crop, with a spacing of 90 cm x 60 cm in the experimental site. Plant samples were collected at 45, 90 DAS, and harvest. Plant samples were shade dried and kept in hot air oven at 75°C until a constant weight was obtained. Samples were powdered and then analysed using standard chemical procedures. Results: The uptake of macronutrients viz., N, P, and K was markedly influenced by the treatments with maximum values recorded by the treatment that received 60 kg P2O5 ha-1 + FYM + PSB. Their uptake significantly differed with increase in dose of phosphorus applied at all growth stages. Combined use of 60 kg P2O5 ha-1 + FYM + PSB resulted in a significant increase in uptake of all micronutrients (Zn, Cu, Mn, and Fe) at all stages except Cu at 90 DAS. Conclusion: Application of phosphorus combined with FYM and PSB not only reduce inorganic phosphorus fertilization but also enhance the uptake of nutrients and plant nutrient content by providing favourable conditions for plant growth. Application of 30 kg P2O5 ha-1+ PSB + FYM was found to be on a par with addition of only 60 kg ha-1P2O5. Hence the P dose can be reduced to half by integrating with PSB and FYM.

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Yield and Nutritional Quality of Cabbage as Affected by Nitrogen and Phosphorus Fertilization

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v41i1.267 ◽

1970 ◽

Vol 41 (1) ◽

pp. 41-46

Author(s):

KMF Haque ◽

AA Jahangir ◽

ME Haque ◽

RK Mondal ◽

MAA Jahan ◽

...

Keyword(s):

Block Design ◽

Growth Yield ◽

Nutrient Content ◽

Phosphorus Fertilization ◽

Fertilizer Treatment ◽

P Fertilization ◽

Nitrogen And Phosphorus ◽

Titrable Acidity ◽

Nitrogen Phosphorus

An experiment was conducted in field condition to study the effect of nitrogen-phosphorus fertilization on growth, yield and nutrient content of cabbage. The experiment was laid out in randomize block design with three replications. The yield and yield components were maximized by N3P2 fertilizer treatment. Nutrient content of cabbage varied with fertilizer treatment. The maximum amount of reducing sugar, ascorbic acid, phosphorus were found at the highest rate of N - P fertilization whereas accumulation of titrable acidity, iron, calcium were maximum at the rate of N2P2 treatment. However pH, ash content were more or less same throughout the experiment. Bangladesh J. Sci. Ind. Res. 41(1-2), 41-46, 2006

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Effects of Soil pH on Competitive Ability and Leaf Nutrient Content of Corn (Zea maysL.) and Three Weed Species

Weed Science ◽

10.1017/s0043174500082631 ◽

1985 ◽

Vol 33 (4) ◽

pp. 447-451 ◽

Cited By ~ 24

Author(s):

Susan E. Weaver ◽

Allan S. Hamill

Keyword(s):

Soil Ph ◽

Competitive Ability ◽

Leaf Tissue ◽

Dry Weight ◽

Nutrient Content ◽

Setaria Viridis ◽

Weed Species ◽

Field Corn ◽

Green Foxtail ◽

Companion Plant

Effects of soil pH on growth, competitive ability, and leaf nutrient content of corn (Zea maysL.), Powell amaranth (Amaranthus powelliiS. Wats. ♯ AMAPO), velvetleaf (Abutilon theophrastiMedic. ♯ ABUTH), and green foxtail [Setaria viridis(L.) Beauv. ♯ SETVI] were measured in the field. Corn yields were significantly reduced by weed competition at all pH levels, but leaf nutrient content, as a percentage of dry weight, was not affected. Aboveground dry weights of Powell amaranth and velvetleaf were significantly lower at pH 4.8 than at pH 6.0 or 7.3, whereas growth of green foxtail was greater at pH 4.8 than at pH 7.3. Weed competitive ability, as evidenced by reductions in dry weight, varied with soil pH and companion plant. Powell amaranth and velvetleaf had higher levels of S, Zn, and especially Mn, at pH 4.8 than at pH 7.3. N and K in the leaf tissue were greater in the weed species than in corn at all soil pH levels. The dicot species had higher percentages of Ca and Mg in leaf tissue at all soil pH levels and accumulated higher percentages of Mn at low pH than the monocot species.

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EVOLUTION OF THE PRODUCTION AND PRICE OF FOREST BIOMASS FOR ENERGY

FLORESTA ◽

10.5380/rf.v49i1.51617 ◽

2018 ◽

Vol 49 (1) ◽

pp. 011

Author(s):

Thiago Manoel Sozinho ◽

David Alexandre Buratto ◽

Anadalvo Juazeiro Dos Santos ◽

João Carlos Garzel Leodoro da Silva ◽

José Roberto Frega

Keyword(s):

Energy Production ◽

Demand Curve ◽

Supply And Demand ◽

Forest Biomass ◽

The State ◽

Planted Forests ◽

Native Forests ◽

Demand Curves ◽

The Right ◽

Biomass For Energy

This study aimed to analyze the evolution of the production and price of biomass from native and planted forests of the state of Paraná (Brazil), between 1998 and 2015, based on the behavior of the prices of the products, according to variations of their supply or demand. The annual rates for growth of the price and quantity produced were calculated and related to the displacements of the supply and demand curves of the products. The results indicated a decrease in the quantity and an increase in the biomass price for native forests, which caused a shift in the supply curve to the left. For the biomass of planted forests, the demand curve shifted to the right due to the demand increase of this product for energy production. The behavior of both curves indicated a substitution of the biomass from native forests to biomass from planted forests due to factors related to the increase of environmental protection regarding the native forests located in the state of Paraná

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Genetic variation in carbon isotope discrimination and its relationship to growth under field conditions in full-sib families of Piceamariana

Canadian Journal of Forest Research ◽

10.1139/x95-005 ◽

1995 ◽

Vol 25 (1) ◽

pp. 39-47 ◽

Cited By ~ 53

Author(s):

Lawrence B. Flanagan ◽

Kurt H. Johnsen

Keyword(s):

Genetic Variation ◽

Carbon Isotope ◽

Carbon Isotope Discrimination ◽

Isotope Composition ◽

Stable Carbon Isotope ◽

Leaf Tissue ◽

Tree Height ◽

Strong Negative Correlation ◽

Isotope Discrimination ◽

Sib Families

Measurements of the stable carbon isotope composition of leaf tissue were made on Piceamariana (Mill.) B.S.P trees from four full-sib families grown on three different field sites at the Petawawa National Forestry Institute, Ontario, Canada. The four families chosen exhibited genetic variation for growth characteristics. Genetic variation was also observed for carbon isotopic discrimination (Δ) among the families of P. mariana. In addition, a strong correlation occurred between Δ values measured on trees in 1991 and 1992, two years that had very different precipitation and temperature conditions during the growing season, indicating that the ranking of individual trees remained almost constant between years. A strong, negative correlation was observed between average carbon isotope discrimination and average tree height for the four families on the driest, least productive site, as was expected based on leaf photosynthetic characteristics. There was no significant correlation, however, between Δ values and growth on the other two study sites, where productivity was higher.

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Improved tree height estimation of secondary forests in the Brazilian Amazon

Acta Amazonica ◽

10.1590/1809-4392201700844 ◽

2018 ◽

Vol 48 (3) ◽

pp. 179-190 ◽

Cited By ~ 4

Author(s):

Henrique Luis Godinho CASSOL ◽

Yosio Edemir SHIMABUKURO ◽

João Manuel de Brito CARREIRAS ◽

Elisabete Caria MORAES

Keyword(s):

Tree Height ◽

Brazilian Amazon ◽

Hyperbolic Model ◽

Secondary Forests ◽

Validation Data ◽

Novel Approach ◽

Brazilian Amazon Region ◽

Species Groups ◽

Ecological Species Groups ◽

Individual Trees

ABSTRACT This paper presents a novel approach for estimating the height of individual trees in secondary forests at two study sites: Manaus (central Amazon) and Santarém (eastern Amazon) in the Brazilian Amazon region. The approach consists of adjusting tree height-diameter at breast height (H:DBH) models in each study site by ecological species groups: pioneers, early secondary, and late secondary. Overall, the DBH and corresponding height (H) of 1,178 individual trees were measured during two field campaigns: August 2014 in Manaus and September 2015 in Santarém. We tested the five most commonly used log-linear and nonlinear H:DBH models, as determined by the available literature. The hyperbolic model: H = a.DBH/(b+DBH) was found to present the best fit when evaluated using validation data. Significant differences in the fitted parameters were found between pioneer and secondary species from Manaus and Santarém by F-test, meaning that site-specific and also ecological-group H:DBH models should be used to more accurately predict H as a function of DBH. This novel approach provides specific equations to estimate height of secondary forest trees for particular sites and ecological species groups. The presented set of equations will allow better biomass and carbon stock estimates in secondary forests of the Brazilian Amazon.

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NUTRITIONAL REQUIREMENTS OF CITRUS CONVERTED FROM FLOOD TO A PRESSURIZED IRRIGATION SYSTEM

HortScience ◽

10.21273/hortsci.27.6.639a ◽

1992 ◽

Vol 27 (6) ◽

pp. 639a-639

Author(s):

B.R. Gardner ◽

R.L. Roth ◽

C.A. Sanchez

Keyword(s):

Irrigation System ◽

Leaf Tissue ◽

N Fertilization ◽

Fruit Yield ◽

Phosphorus Fertilization ◽

Juice Quality ◽

Tree Roots ◽

P Fertilizer ◽

Yield Responses ◽

N Rates

A study was conducted during four seasons to evaluate the nutrient requirements of `Valencia' oranges converted from flood to a pressurized spray irrigation system. The experiment was a 3×2×2 factorial with 3 N rates (0.34, 0.68, and 1.36 kg/tree/year), 2 P rates (0 and 0.11 kg/tree/year) and with and without added micronutrients (Fe, Zn, Mn, and Cu). There were no growth or yield responses to micronutrients. Phosphorus fertilization increased fruit yield, improved juice quality, and reduced peel thickness. There were trends for N to reduce juice quality and increase peel thickness when P fertilizer was not added. Tree growth increased by N fertilization only the first season after conversion. Fruit yield also increased by N but only when P was added. Leaf tissue N concentrations increased with time during the first two years within N treatments. These data suggest that the higher rates of N may only be needed initially after conversion as the tree roots adapt to the new irrigation system.

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