Chipilín (C. longirostrata Hook. and Arn.) Capacity for Regrowth and Leaf Area Production in Response to Nitrogen and Phosphorus Fertilizer Application 

2021 ◽  
Author(s):  
N. Pardo-Aguilar ◽  
L.C. Lagunes-Espinoza ◽  
S. Salgado-García ◽  
E. Hernández-Nataren ◽  
E.D. Bolaños-Aguilar
Keyword(s):  
Leaf Area ◽  
Growth Yield ◽  
Phosphate Fertilizer ◽  
Nitrogen Addition ◽  
Fertilizer Application ◽  
Carotenoid Content ◽  
Leaf Biomass ◽  
Total Biomass ◽  
Nitrogen And Phosphorus ◽  
Randomized Design

Background: Fertilizer application combined with successive foliage cuttings can positively affect plant growth, yield and quality. The objective of this study was to evaluate the response of chipilín to successive foliage cuttings and nitrogen and phosphate fertilizer application under greenhouse conditions. Methods: During 2018, an experiment was carried out in a greenhouse under a completely randomized design, with six replications of each treatment. The treatments were as follows: control, 100 kg ha-1 N as urea and 60 kg ha-1 P2O5 as triple superphosphate. The fertilizers were applied one month after planting (MAP). Two MAPs, uniform cuttings were performed, followed by three successive cuttings, with one every 30 days. At each cutting, the traits evaluated included the number of new shoots; the length, diameter, leaf area and dry biomass of the new shoots by component (leaves and stems); the relative growth rate (RGR) of the biomass of the shoot leaves, the chlorophyll (a, b and total) and carotenoid content and NDVI. Result: Cutting foliage every 30 days increased (p less than 0.05) the number of new shoots, leaf biomass, total biomass and leaf area, but reduced the length and diameter of the shoots. There was no effect (p greater than 0.05) of cutting on root biomass or nodulation, but there was an effect of fertilizer application, with both variables decreasing with nitrogen addition.

EFFECT OF SEEDING DATE, NITROGEN AND PHOSPHATE FERTILIZER ON GROWTH, YIELD AND QUALITY OF RAPESEED IN NORTHWEST ALBERTA

1985 ◽  
Vol 65 (2) ◽  
pp. 275-284 ◽  
Author(s):  
J. V. CHRISTENSEN ◽  
A. M. F. HENNIG ◽  
J. S. McKENZIE ◽  
W. G. LEGGE ◽  
R. M. DePAUW ◽  
...  
Keyword(s):  
Seed Quality ◽  
Brassica Campestris ◽  
Plant Density ◽  
Growth Yield ◽  
Phosphate Fertilizer ◽  
Control Treatment ◽  
Fertilizer Treatment ◽  
Nutrient Deficiencies ◽  
Nitrogen And Phosphorus ◽  
Seeding Date

The effects of seeding data and nitrogen and phosphate fertilizer on the agronomic characteristics of two rapeseed species (Brassica campestris L. and B. napus L.) were studied for a 6-yr period at two northwest Alberta locations. Seeding dates were established at weekly intervals from early May to mid-June. Two fertility levels were established; a control treatment in which no fertilizer was applied and a fertilizer treatment in which nitrogen and phosphorus were applied to meet the requirements of a 1680 kg∙ha−1 crop. Maximum yields were obtained most frequently with seeding periods of mid- to late May for B. campestris and mid-May for B. napus. Seeding date had little effect on plant density or seed quality. Nitrogen and phosphate fertilizer reduced plant densities but increased seed yield where nutrient deficiencies occurred.Key words: Brassica campestris L., B. napus L., seeding date, yield, quality

scholarly journals Influence of Phosphorus on Initial Growth and Production of Fresh Biomass of Legumes

2020 ◽  
pp. 51-59
Author(s):  
Sebastiana Renata Vilela Azevedo ◽  
Geovana Gomes de Sousa ◽  
Maria Beatriz Ferreira ◽  
Marcelo Pereira Dutra Júnior ◽  
Iara Cristina Araujo Rocha ◽  
...  
Keyword(s):  
Biomass Production ◽  
Phosphate Fertilizer ◽  
Total Biomass ◽  
Initial Growth ◽  
Forest Nursery ◽  
Fresh Biomass ◽  
Randomized Design ◽  
Cultivated Species ◽  
Single Super Phosphate ◽  
Completely Randomized Design

Aims: To evaluate whether the initial growth and production of green biomass of the legume species Crotalaria juncea L. and Canavalia ensiformis (L.) DC. are influenced by phosphate fertilizer. Study Design: A completely randomized design was used in a scheme 05 treatments x 02 cultures, with 3 replications, totaling 30 vessels in the experiment. Place and Duration of Study: Forest nursery the Federal University of Campina Grande, campus of Patos-PB, between April 2018 and May 2018. Methodology: The treatments consisted of two legumes (C. juncea and C. ensiformis) and five doses of phosphorus (00-50-100-150-200 mg kg-1 of P2O5) through single super phosphate. Fortnightly measurements of height and diameter were performed for 60 days. Fresh biomass of the shot and root was obtained at the end of the evaluations. Results: There is a higher growth in height for individuals of C. ensiformis when cultivated in doses of 150 mg kg-1, with an average of 30.68 cm. For C. juncea, the treatments were similar. For the stem diameter, there was significant interaction (p <0.05) only for C. juncea, in which, unlike the results obtained for height, this variable grew linearly with increased phosphorus doses. Regardeless of the P doses fresh biomass production of C. ensiformis was higher than to C. juncea. Already in function on the levels of P there is an influence of nutrient only for C. ensiformis, with higher total biomass production and when cultivated with 100 mg kg-1 of P2O5. Conclusion: Regardless of the cultivated species phosphorus influences the initial growth and production of fresh biomass. In general, it is recommended to cultivate the legumes studied with doses of 100 mg kg-1 of P2O5 through single super phosphate for a higher production of total fresh biomass.

scholarly journals Effects of Fertilization Regimes on Grain Yields and Economic Returns of Pathum Thani 1 Rice Grown on Sapphaya Soil Series

2021 ◽  
Vol 18 (2) ◽  
Author(s):  
Auraiwan ISUWAN ◽  
Thanakrit KEAWARAM
Keyword(s):  
Soil Analysis ◽  
Nutrient Use Efficiency ◽  
Farming Systems ◽  
Fertilizer Application ◽  
Soil Series ◽  
Economic Returns ◽  
Nitrogen And Phosphorus ◽  
Economic Return ◽  
Grain Yields ◽  
Randomized Design

Fertilizer has been considered as one of the most important inputs, driving productivity and economic returns of rice farming systems. This study aimed to determine an optimized fertilizer rate to maximize grain yields, economic returns over fertilizer cost, and agronomic fertilizer nutrient use efficiency (ANUE) of Pathum Thani 1 rice grown on Sapphaya soil series. A completely randomized design with 5 replications was used. The treatments involved 4 fertilizer regimes: 1) no fertilizer application (control, C), 2) fertilizer application based on soil analysis (SSF) at a rate of 4–4.4–4 kg N–P2O5–K2O/rai (1 rai = 0.16 hectare), 3) fertilizer application based on precision fertilizer management (PF) at a rate of 7.86–2.52–13.39 kg/rai and 4) fertilizer application based on traditional farmer practice (F) at a rate of 15.5–5–0 kg/rai. The results uncovered that grain yields (1,055 kg/rai) and economic return (7,724 Baht/rai) of rice received the PF treatment were significantly highest (P < 0.05), which were approximately 78, 37, and 27 % greater than those in the C, SSF, and F treatments, respectively. Similarly, the economic return of the PF was approximately 73, 46, and 35 % superior to those in the C, SSF, and F treatments, respectively. Moreover, ANUE (nitrogen and phosphorus) of rice received PF were greater (P < 0.05) than other treatments. These results suggest that productivity and economic returns of Pathum Thani 1 rice grown on Sapphaya soil series can be optimized by applying fertilizer at a rate of 7.86–2.52–13.39 kg N–P2O5–K2O/rai.

Biomass and Leaf-Area Estimates for Varnishleaf Ceanothus, Deerbrush, and Whiteleaf Manzanita

1987 ◽  
Vol 2 (4) ◽  
pp. 124-128 ◽  
Author(s):  
Thomas F. Hughes ◽  
Christopher R. Latt ◽  
John C. Tappeiner ◽  
Michael Newton
Keyword(s):  
Leaf Area ◽  
Site Occupancy ◽  
Basal Area ◽  
Stem Length ◽  
Stand Age ◽  
Leaf Biomass ◽  
Total Biomass ◽  
Regression Equations ◽  
Area Index ◽  
Highly Correlated

Abstract To help foresters assess site occupancy of seed-established stands of varnishleaf (Ceanothus velutinus var. laevigatus) deerbrush (Ceanothus integerrimus), and whiteleaf manzanita (Arctostaphylos viscida), we developed equations for estimating their aboveground biomass and leaf area. From 9 to 14 pure stands from 2 to 20 years old were selected for each species in southwest Oregon and northern California. Individual stems of Ceanothus species and whole bushes of manzanita were destructively sampled Regression equations for leaf and total biomass of manzanita plants and for stems of Ceanothus sp. showed that these variables were highly correlated with trunk or stem diameter (r² = 0.85 - 0.99). Total biomass, leaf biomass, and leaf area index (LAI) of stands can be estimated accurately from measurements of stem or trunk basal area (r² = 0.87 - 0.99). Stand age (yr) and average stem length (cm) are also reliable estimators (r² = 0.74 - 0.82). It appears that stands of varnishleaf attain a maximum LAI of 5.5 m²/m² by 7 years, whereas the maximum values for deer-brush and manzanita were 2.8 and 3.5, respectively, at about 15 years. Stands of all three species apparently continue to produce net biomass well beyond 16 years of age. West. J. Appl. For. 2(4):124-128, October 1987.

scholarly journals Morpho-physiological and yield performance of grain sorghum genotypes

2015 ◽  
Vol 1 (2) ◽  
pp. 271-284
Author(s):  
Shepon Chandra Ghosh ◽  
Soleh Akram ◽  
SM Ahsan ◽  
Abdulla Al Asif ◽  
Sayeed Shahriyar
Keyword(s):  
Leaf Area ◽  
Growth Yield ◽  
Area Index ◽  
Randomized Design ◽  
Biological Yield ◽  
Number Of Leaves ◽  
Sorghum Genotypes ◽  
1000 Grain Weight ◽  
Range Test ◽  
Physiological Characters

A pot experiment was carried out at the grill house of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh during the period from December 2013 to April 2014 to study the growth, morpho-physiological, yield and yield contributing characters of twenty sorghum genotypes. The experiment was consisted of twenty genotypes of sorghum viz., BD 700, BD 701, BD 702, BD703, BD704, BD705, BD706, BD707, BD708, BD709, BD710, BD712, BD720, BD721, BD722, BD725, BD726, BD727, BD728 and BD729. The experiment was laid out in a Completely Randomized Design with three replications. The collected data were analyzed statistically and the means were adjudged by Duncan’s multiple range test at 1% level of probability. Among the genotypes, BD 725 showed significantly the best performance on growth, yield and morpho–physiological characters compare to other genotypes at harvest, while BD728 was less efficient among those parameters. As a result, highest plant height (251.20 cm), panicle plant–1 (2.83), highest 1000–grain weight (27.10 g), highest grain yield (3.58 t ha–1), straw yield (16.05 t ha–1) and biological yield (19.64 t ha–1) was recorded from BD 725 at harvest. However, number of leaves, leaf area plant–1 and Leaf area index had also significantly highest (18.33 and 5542.0 cm2 and 2.81, respectively) in BD 725 at 90 days after sowing. BD 725 further recorded the highest growth of cumulative growth rate (32.54 g m–2 day–1) at the stage between 60–90 days after sowing thereafter they decreased. All the above growth, yield and morpho–physiological characters were less effective in BD728. On the basis of these results, BD 725 was found outstanding for plant growth, yield and morpho–physiological characters of sorghum.Asian J. Med. Biol. Res. June 2015, 1(2): 271-284

scholarly journals Growth of yacon under artificial shading

2021 ◽  
Vol 39 (2) ◽  
pp. 133-139
Author(s):  
Ariany das Graças Teixeira ◽  
Fábio Luiz de Oliveira ◽  
Tiago P Mendes ◽  
Paulo Cezar Cavatte ◽  
Magno do C Parajara ◽  
...  
Keyword(s):  
Leaf Area ◽  
Growth Rates ◽  
Mass Fraction ◽  
Dry Mass ◽  
Total Biomass ◽  
Tuberous Roots ◽  
Randomized Design ◽  
Absolute Growth ◽  
Net Assimilation ◽  
Artificial Shading

ABSTRACT Yacon is a tuberous root cultivated in mild climate regions with high altitudes, but the crop shows the capacity to develop at low altitudes. The objective of this study was to evaluate growth rates and the partition of photoassimilates in yacon plants under different levels of artificial shading. The experiment was conducted in four shading levels (0%, 30%, 50% and 70%), and seven monthly harvests in a completely randomized design. We evaluated the accumulation of total dry mass on the whole plant and its parts; leaf area; leaf area ratio; leaf mass fraction; stem mass fraction; rhizophores mass fraction; tuberous roots mass fraction; estimates of relative growth rate, absolute growth, and net assimilation. The lower accumulation of total dry biomass and the lowest growth rates indicate that conditions of noticeable light restriction (70% shading) restrict the growth of yacon. Yacon plants grown under moderate shading levels (30 to 50%) showed greater capacity of accumulation of total biomass, directing part of this biomass to the tuberous roots, which directly reflects gains in the agronomic productivity of this crop, indicating that yacon has the potential to be associated with other crops, which promote a moderate shading.

scholarly journals ESTRUCTURA DE LAS PRADERAS DE THALASSIA TESTUDINUM EN UN GRADIENTE DE PROFUNDIDAD EN LA GUAJIRA, CARIBE COLOMBIANO

2016 ◽  
Vol 39 (2) ◽  
Author(s):  
Margarita R. Albis Salas ◽  
Diana I. Gómez López ◽  
Guillermo Duque
Keyword(s):  
Organic Matter ◽  
Leaf Area ◽  
Organic Matter Content ◽  
Shoot Density ◽  
Thalassia Testudinum ◽  
Matter Content ◽  
Leaf Biomass ◽  
Total Biomass ◽  
Seagrass Beds ◽  
Substrate Type

The spatial distribution of seagrass beds depends on environmental factors such as light, temperature, salinity, substrate type, and nutrient availability. There is an extensive area of seagrass beds dominated by Thalassia testudinum along the shallow continental shelf of La Guajira, representing more than 80 % of the seagrass beds in Colombia. In order to describe seagrass distribution and its relation to organic matter, substrate type and depth structural variables of T. testudinum were measured at l5 locations placed at one of the following depth ranges: shallow (0-2 m), intermediate (2-4 m), and deep (>4 m). Shoot density was measured with 20 x 20 cm quadrants while shoot samples were collected from 20 x 10 cm sub-quadrants in order to measure leaf biomass, epiphyte weight, grazing and leaf area. Total biomass and sediment core were measured from sediments core samples. High values of shoot density (437.5 m-2), leaf biomass (84.8 g m-2), total biomass (5.9 kg m-2) and leaf area (24.8 cm2), were related with depths less than 3.5 m while at higher depths plants presented lower shoot density (137.5 m2), biomass (7.5 g m-2) and leaf area (4.6 cm2). The epiphyte weight registered high values in deeper seagrass beds (52.5 %) where grazing had lesser impact (53.3 %). Additionally, better devolped seagrass beds were found in areas of organic matter content, fine sediments and protected areas.

scholarly journals Effects of nitrogen and phosphorus availability on the early growth of two congeneric pairs of savanna and forest species

2022 ◽  
Vol 82 ◽  
Author(s):  
B. Paganeli ◽  
M. A. Batalha
Keyword(s):  
Leaf Area ◽  
Phosphorus Limitation ◽  
Tropical Region ◽  
Total Biomass ◽  
Forest Species ◽  
Nitrogen And Phosphorus ◽  
Tropical Regions ◽  
Hoagland Solution ◽  
Nutritional Strategies ◽  
Seasonal Forests

Abstract In the tropical region, savannas and seasonal forests, both highly diverse biomes, occur side by side, under the same climate. If so, that mosaic cannot be explained solely by climatic variables, but also by fire, water availability and soil status. Nutrient availability in the soil, especially nitrogen and phosphorus, has been postulated to explain the abrupt transitions between savannas and seasonal forests in tropical regions. Plants from these two biomes may present different nutritional strategies to cope with nitrogen and phosphorus limitation. We used two congeneric pairs of trees — each pair with a species from the savanna and another from the neighboring seasonal forest — to test whether savanna and forest species presented different nutritional strategies during their early development. We cultivated 56 individuals from each of these species in a hydroponics system with four treatments: (1) complete Hoagland solution, (2) Hoagland solution without nitrogen, (3) Hoagland solution without phosphorus, and (4) Hoagland solution without nitrogen and phosphorus. After 45 days, we harvested the plants and measured total biomass, root to shoot ratio, height, leaf area, and specific leaf area. Overall, savanna species were lighter, shorter, with smaller leaves, higher specific leaf areas, and higher root to shoot ratios when compared to the forest species. Nitrogen increased the performance of species from both biomes. Phosphorus improved the performance of the forest species and caused toxicity symptoms in the savanna species. Hence, savanna and forest species presented different demands and were partially distinct already as seedlings concerning their nutritional strategies.

Factors affecting yield and fertilizer response of sugar beet in Iran

1973 ◽  
Vol 81 (2) ◽  
pp. 311-316
Author(s):  
E. W. Bolle-Jones ◽  
F. Sanei
Keyword(s):  
Sugar Beet ◽  
Field Experiments ◽  
Phosphate Fertilizer ◽  
Fertilizer Application ◽  
Yield Response ◽  
Soil Test ◽  
Nitrogen And Phosphorus ◽  
Fertilizer Response ◽  
High Calcium ◽  
Yield Responses

SummaryField experiments were conducted in four provinces of Iran in which sugar-beet yield responses to added nitrogen and phosphorus fertilizers were correlated with soil test values and number of irrigations.Although significant yield responses to fertilizer application were obtained in all four provinces, extremely few significant relationships were established between soil test values and yield response.Average crop yield was favourably influenced by the number of irrigations applied in Fare and Khorasan, by organic carbon status in Esfahan and Khorasan and adversely affected by increased soil conductivity in Esfahan and Khorasan. These results were taken to imply an inadequate number of irrigations in Fars and Khorasan. The high calcium carbonate status found in Fars soil adversely affected the level of average yield.Response to nitrogen fertilizer declined in Fars and Khorasan as the leaf nitrogen exceeded 3·15 and 4·0% respectively. Response to phosphate fertilizer declined in West Azerbaijan and Khorasan when leaf phosphorus exceeded 0·4%.

The Effect of Sulfur and Phosphate Fertilizers Application on the Dissolved Phosphorus Amount in Rhizosphere of Zea Maize L.

2019 ◽  
Vol 9 (2) ◽  
pp. 233-239
Author(s):  
Raid SH. Jarallah ◽  
Nihad A. Abbas
Keyword(s):  
Plant Growth ◽  
Rhizosphere Soil ◽  
Phosphate Fertilizer ◽  
Fertilizer Application ◽  
Phosphate Fertilizers ◽  
College Of Agriculture ◽  
Dissolved Phosphorus ◽  
Maize Seeds ◽  
Randomized Design ◽  
Four Levels

The experiment has been carried out in the department of soil sciences and water resources,college of agriculture, university of Al-Qadisiyah, during the agricultural season 2017-2018 by using the design Complete Randomized Design (C.R.D). The experiment in pots has used four levels of phosphate fertilizer P0, P1, P2, P3 (0, 30, 60 and 90) kg P. h1- respectively and one level of sulfuric fertilizer (agricultural and wettable) Sa and S (200) kg S.h1- . Maize seeds of DKC 6120 variety have been in plastic pots grown. Dissolved phosphorus in the soil is estimated during plant growth periods (40, 70, and 100) days of planting to study the effect of its application levels, sulfuric fertilizer application (agricultural and wettable) fertilizers and their overlap on the amount of dissolved phosphorus into the corn rhizosphere.Results show that the highest amount of dissolved phosphorus in and out of the rhizosphere soil obtained with application of the phosphate level P3 (90) kg P. h1- which were (0.69, 0.58, 0.55) μg. g1-and (0.75, 0.63, 0.59) μg. g1- for the soils of the rhizosphere and beyond respectively during the periods (40, 70 and 100) days of planting.

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