scholarly journals Mycorrhizal Inoculation and Chemical Fertilizer Interactions in Pineapple under Field Conditions

Agriculture ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 934
Author(s):  
Dora Trejo ◽  
Wendy Sangabriel-Conde ◽  
Mayra E. Gavito-Pardo ◽  
Jacob Banuelos
Keyword(s):  
Fruit Quality ◽  
Mycorrhizal Fungi ◽  
Block Design ◽  
Chemical Fertilizer ◽  
Production Costs ◽  
Partial Substitution ◽  
Experimental Unit ◽  
Chemical Fertilization ◽  
Mycorrhizal Inoculation ◽  
Amf Inoculation

Excessive inorganic fertilizers applied to pineapple crops in Mexico cause the progressive degradation and pollution of soils in the short- and long-term, and they also increase production costs. An alternative to reduce excessive fertilization is its partial substitution by nutrition and growth enhancing arbuscular mycorrhizal fungi (AMF). The goal of this research was to compare the effect of AMF inoculation combined with different fertilizer doses and full chemical fertilization on pineapple yield variables in a commercial plantation. We used a randomized block design with six treatments: a non-inoculated control with 100% chemical fertilization, and five treatments with AMF inoculation and fertilization doses of 0%, 25%, 50%, 75%, and 100% chemical fertilization. There were four replicates of each treatment containing 30 plants in each experimental unit (plot). We measured the dry weight of the D-leaf 9 months after planting, and the root mycorrhizal colonization percentage, yield, and fruit quality after 18 months. Mycorrhizal inoculation equated to 100% chemical fertilization already when combined with 25% fertilization and surpassed it when combined with 50% fertilization in most of the yield variables measured. The fruit mass and organoleptic variables were significantly higher in mycorrhizal plants with 50% fertilization than in the non-inoculated control and the treatments inoculated with AMF and combined with 0%, 25%, 75%, and 100% of a dose of chemical fertilizer. Inoculation with mycorrhizal fungi in the field could reduce chemical fertilizer application by 50%, with no yield loss and with improved fruit quality.

scholarly journals Effect of Arbuscular Mycorrhizal Fungi on the Tolerance to Sodium Chloride Levels, and on Growth and Yield of Lentil (Lens culinaris)

2017 ◽  
Vol 15 (1) ◽  
pp. 156-169 ◽  
Author(s):  
M Rahman ◽  
MAH Bhuiyan ◽  
ME Ali ◽  
F Alam ◽  
RA Begum
Keyword(s):  
Sodium Chloride ◽  
Seed Yield ◽  
Mycorrhizal Fungi ◽  
Agricultural Research ◽  
Block Design ◽  
Growth And Yield ◽  
Yield Attributes ◽  
Stover Yield ◽  
Mycorrhizal Inoculation ◽  
Mycorrhizal Plants

A pot experiment was carried out in the nethouse of Soil Science Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during 2014-2015 through 2015-2016. The design of the experiment was factorial randomized completely block design with 4 replications. The objectives of the study were to evaluate the potential of Arbuscular mycorrhization (AM) on the germination, yield and yield attributes of lentil treated with different concentration of sodium chloride (NaCl). Five NaCl treatments (0, 1, 2, 3 and 4%) possessed NaCl level as the first factor that were treated with soils before sowing of lentil seeds overriding or pivotal pulse crop in Bangladesh. The second factor consists of mycorrhizal and non-mycorrhizal treatments. Mycorrhizal plants showed better performance in terms of germination %, yield and yield contributing characters than non-mycorrhizal plants. With increasing NaCl concentration germination %, yield and yield contributing characters in the rhizosphere soil, decreased significantly (p<0.01). Interaction effects of mycorrhizal inoculation and NaCl on germination %, growth and yield of lentil were appeared to be statistically non-significant. The highest germination (96.25% in 2014-2015 and 92.50% in 2015-2016), seed yield (6.45 g pot-1 in 2014-2015 and 5.89 g pot-1 in 2015-2016), and stover yield (9.55 g pot-1 in 2014-2015 and 8.58 g pot-1 in 2015-2016) was found in NaCl 0% + AM treatment. The lowest germination %, seed yield and stover yield was found in NaCl 4% treatment. Mycorrhizal inoculation increased seed yield on an average by 31.85% during 2014-2015 and 63.71% during 2015-2016, and increased stover yield on an average by 48.56% during 2014-2015 and 63.55% during 2015-2016 over non-mycorrhizal inoculation. Therefore, it can be concluded that mycorrhizal inoculation increases germination %, growth and yield of lentil over non-mycorrhizal inoculation. The Agriculturists 2017; 15(1) 156-169

scholarly journals Bio-fortified Compost as A Substitute for Chemical N Fertilizer for Growth, N Accumulation, and Yield of Sweet Corn

Akta Agrosia ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 84-94
Author(s):  
Marwanto Marwanto ◽  
Shinta Puspita Wati ◽  
Atra Romeida ◽  
Merakati Handajaningsih ◽  
Teguh Adiprasetyo ◽  
...  
Keyword(s):  
Crop Yield ◽  
Sweet Corn ◽  
Block Design ◽  
Chemical Fertilizer ◽  
N Fertilizer ◽  
Growth And Yield ◽  
Partial Substitution ◽  
Inorganic N ◽  
N Accumulation ◽  
Total N

ABSTRACTFinding the appropriate method of fertilizer application to simultaneously enhance farm productivity and ensure ecosystem sustainability has been receiving a lot of attention. A field experiment was carried in the Research Plot Agriculture Faculty Bengkulu University Campus Indonesia in 2017. The purpose of this study was (1) to assess the significant effects of inorganic N fertilizer (IF) substitution with bio-fortified compost (BC) under equal N conditions on growth, N accumulation, and yield of sweet corn, and (2) to determine the appropriate level to which inorganic N fertilizer could be reduced and equivalently replaced by bio-fortified compost to promote sweet corn growth and yield. The treatments consisted of six different proportions of inorganic N fertilizer (IF) substitution with bio-fortified compost (BC). Each treatment was designed on the basis of equal amount of total N input from a combination of both fertilizers (138 kg N ha-1).  They were arranged in a randomized block design with 3 replications. They included (1) 100% IF plus 0% BC, (2) 75% IF plus 25% BC, (3) 50% IF plus 50% BC, (4) 25% IF plus 75%, (5) 0% IF plus 100% BC, and (6) no IF and no BC. The results showed that the increasing proportion of IF replaced by BC resulted in an increase for all variables (except for plant height) but they decreased when 100% IF substitution with 100% BC was applied. Among the partial substitution treatments, 50% IF plus 50% BC consistently produced the best growth, N accumulation, and yield increase. Treatments of 50% IF plus 50% BC and 25% IF plus 75% BC produced the highest green cob weight with husk per plot (10.74 – 10.84 kg plot-1), which was 16% to 19% higher than treatment of 100% IF plus % BC. The three partial substitution treatments produced crop yield components as good as treatment of 100% IF plus 0% BC. Treatment of 0% IF plus 100% BC reduced plant growth, N accumulation, and crop yield and its components. The appropriate level to which IF could be reduced and equivalently replaced by BC was at the range of 25% to 75%. Hence, a suitable replacement of inorganic N fertilizer with bio-fortified compost is considered a reasoned way to simultaneously increase crop yield and reduce environmental degradation.Keywords: organic fertilizer, chemical fertilizer, bio-fortification, chemical fertilizer substitution, bio-fortified compost

scholarly journals Inoculation with arbuscular micorrizhal fungi and organic compost from cocoa shell positively influence the growth and mineral nutrition of soursop plants (Annona muricata l.)

2018 ◽  
Vol 40 (5) ◽  
Author(s):  
Gedeon Almeida Gomes Júnior ◽  
Rafaela Alves Pereira ◽  
George Andrade Sodré ◽  
Célio Kersul do Sacramneto ◽  
Eduardo Gross
Keyword(s):  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Annona Muricata ◽  
Adequate Response ◽  
Growth And Nutrition ◽  
P Content ◽  
Cocoa Shell ◽  
Mycorrhizal Inoculation ◽  
Organic Compost ◽  
Amf Inoculation

Abstract The aim of this study was to evaluate the effect of arbuscular mycorrhizal fungi inoculation (AMF - Acaulospora scrobiculata, Acaulospora colombiana and the mixture of these inocula) and doses of organic compost obtained from cocoa shell (0, 5, 10, 20 and 30 g dm-3) on “Morada” soursop seedlings. The experimental design was a randomized block with 4 blocks in a 5 x 4 factorial scheme (AMF x organic compost). After 120 days of growth, it was observed that AMF inoculation increased height, stem diameter and shoot, root and total dry biomass. Organic compost stimulated mycorrhizal colonization and the number of spores with the addition up to 10 g dm-3. Mycorrhizal inoculation promoted increases of P content in soursop leaves. Control plants did not show adequate response to doses of the organic compost applied and it was concluded that AMF inoculation combined with organic compost increased the growth and nutrition of soursop plants.

scholarly journals PRODUÇÃO E VALOR NUTRITIVO DE CAPIM-PIATÃ SUBMETIDO À ADUBAÇÃO ORGÂNICA E QUÍMICA

Nativa ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 150
Author(s):  
Thiago Trento Biserra ◽  
Luísa Melville Paiva ◽  
Henrique Jorge Fernandes ◽  
Camila Fernandes Domingues Duarte ◽  
Alex Coene Fleitas ◽  
...  
Keyword(s):  
Nutritional Value ◽  
Nutritive Value ◽  
Chemical Fertilizer ◽  
Neutral Detergent Fiber ◽  
Partial Substitution ◽  
Acid Detergent Fiber ◽  
Brachiaria Brizantha ◽  
Promising Alternative ◽  
Chemical Fertilization ◽  
Dose Control

A adubação orgânica pode ser utilizada de forma sustentável visando o fornecimento de nutrientes as plantas. No entanto, são restritas as informações referentes às doses a serem aplicadas. Objetivou-se avaliar o desenvolvimento e valor nutritivo de capim-piatã recebendo diferentes níveis de biofertilizante (0, 1,0, 2,0, 3,0 e 4,0 L de biofertilizante líquido de esterco bovino por vaso) e diferentes condições de adubação química (dose zero – controle, com aplicação de 50 e 100% da recomendação de adubação química). O biofertilizante associado ou não com adubação química proporcionou aumentos na massa de forragem, massa de raiz e altura final das plantas e redução da razão parte aérea:raiz. A concentração proteína bruta foi influenciada pelos níveis de biofertilizante aplicado, na ausência de adubação química. As concentrações de fibra em detergente neutro e fibra em detergente ácido responderam de forma quadrática aos níveis de biofertilizante utilizado, quando foram associadas a 100% da dose recomendada de adubação química.  Quando 50% da recomendação adubação química foi utilizada a fibra em detergente ácido aumentou linearmente. A utilização de biofertilizante pode ser uma alternativa promissora em substituição total ou parcial da adubação química, melhorando o desenvolvimento e valor nutritivo do capim- piatã na implantação.Palavras-chave: biofertilização; Brachiaria brizantha cv. BRS Piatã; desenvolvimento sustentável. PRODUCTION AND NUTRITIVE VALUE OF PIATÃ PALISADE GRASS SUBMITTEDTO ORGANIC AND CHEMICAL FERTILIZATION ABSTRACT: Organic fertilization can be used sustainably in providing nutrients to plants. However, information regarding the doses to be applied is restricted. The objective was to evaluate the development and nutritional value of piatã palisade grass receiving different levels of biofertilizer (0, 1.0, 2.0, 3.0 and 4.0 L of liquid bovine manure biofertilizer) and different conditions of chemical fertilization (zero dose - control, applying 50 and 100% of the chemical fertilization recommendation). The biofertilizer associated or not with chemical fertilization provided increases in forage mass, root mass and final plant height and reduced shoot: root ratio. The crude protein concentration was influenced by the levels of biofertilizer applied in the absence of chemical fertilization. The concentrations of neutral detergent fiber and acid detergent fiber concentrations responded quadratically to the levels of biofertilizer used, when they were associated with 100% of the recommended chemical fertilizer dose. When 50% of the chemical fertilizer recommendation was used the acid detergent fiber increased linearly. The use of biofertilizer can be a promising alternative in total or partial substitution of chemical fertilization, improving the development and nutritional value of the piatã palisade grass at implantation.Keywords: biofertilization; Brachiaria brizantha cv. BRS Piatã; sustainable development.

scholarly journals Absorption of nutrients by soursop seedlings in response to mycorrhizal inoculation and addition of organic compost1

2018 ◽  
Vol 48 (3) ◽  
pp. 287-294
Author(s):  
Gedeon Almeida Gomes Júnior ◽  
Rafaela Alves Pereira ◽  
George Andrade Sodré ◽  
Célio Kersul do Sacramento ◽  
Eduardo Gross
Keyword(s):  
Mycorrhizal Fungi ◽  
Production Systems ◽  
Arbuscular Mycorrhizal ◽  
Organic Production ◽  
Organic Fertilization ◽  
Growth And Nutrition ◽  
Mycorrhizal Inoculation ◽  
Management Alternatives ◽  
Organic Compost ◽  
Amf Inoculation

ABSTRACT The use of organic composts and the inoculation of arbuscular mycorrhizal fungi (AMF) are management alternatives in organic production systems. This study aimed to evaluate the effect of AMF inoculation (Acaulospora scrobiculata, Acaulospora colombiana and without inoculation) and organic compost of cacao bark (0 g dm-3, 5 g dm-3, 10 g dm-3, 20 g dm-3 and 30 g dm-3) on the mycorrhizal efficiency and nutrient uptake, in 'Morada' soursop seedlings. The experimental design was completely randomized, in a 3 x 5 factorial arrangement (AMF x organic compost), with four replicates. A higher mycorrhizal efficiency was observed for the A. colombiana isolate, with the addition of 0 g dm-3, 5 g dm-3 and 10 g dm-3 of organic compost to the soil, in relation to the A. scrobiculata isolate, which differed statistically at the doses of 20 g dm-3 and 30 g dm-3 of organic compost. The AMF inoculation promotes increases in the N, P, K, Zn, Cu, Fe and Mn contents, when compared to plants without inoculation. The organic compost exerts an effect on the inoculation, mainly on the absorption of P. The AMF inoculation, together with the organic fertilization, promotes the growth and nutrition of seedlings.

scholarly journals Respuesta foliar y radical del maíz a la fertilización biológica-química en un suelo Luvisol

2018 ◽  
Vol 29 (2) ◽  
pp. 325
Author(s):  
David Montejo Martínez ◽  
Fernando Casanova Lugo ◽  
Martín García Gómez ◽  
Iván Oros Ortega ◽  
Víctor Díaz Echeverría ◽  
...  
Keyword(s):  
Mycorrhizal Fungi ◽  
Block Design ◽  
Experimental Period ◽  
Chemical Fertilizer ◽  
Quintana Roo ◽  
Stem Height ◽  
Chemical Fertilizers ◽  
Maize Crop ◽  
Randomized Complete Block Design ◽  
Root Response

An alternative to replace the excessive use of chemical fertilizers is the use of soil microorganisms. In this regard, using nitrogen fixingbacteria (N) and mycorrhizal fungi may improve the growth of different crops. The objective was to evaluate the influence of Rhizophagus intraradices and Azospirillum brasilense, as well as the addition of chemical fertilizers on foliar and root response of maize crop in Luvisol soil. The study was conducted from October 2014 to January 2015 at the Technological Institute of the Mayan Zone, Quintana Roo, Mexico.A cornculture was established by a randomized complete block design, and four treatments with four replicates: Mycorrhiza and Azospirillum (MA), Mycorrhiza and Azospirillum + 50% chemical fertilizer, (MA + FQ50%), 100% chemical fertilizer FQ100%) in doses of 142-70-00 kg / ha and a control. Stem height and diameter of the plants were measured. In addition, the number and length of roots were monitored by means of the minirhizotron technique at five depths and at different ages of the plants. At the end of the experimental period, leaf and root biomass were quantified. Treatments of FQ100% and MA + FQ50% presented higher total height and higher stem diameter of the plants. Also, these showed the highest number and length of fine roots, compared to the other treatments. However, treatment with MA + FQ50% kept the highest amount of biomass at the end of the crop.

scholarly journals SOIL CHEMICAL PROPERTIES AND GROWTH OF SUNFLOWER (HELIANTHUS ANNUUS L.) AS AFFECTED BY THE APPLICATION OF ORGANIC FERTILIZERS AND INOCULATION WITH ARBUSCULAR MYCORRHIZAL FUNGI

2015 ◽  
Vol 39 (1) ◽  
pp. 151-161 ◽  
Author(s):  
Apolino José Nogueira da Silva ◽  
Ricardo Alencar da Silva ◽  
Juliana da Silva Santos ◽  
Jordan Carlos Silva de Medeiros ◽  
Fabíola Gomes de Carvalho ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Helianthus Annuus ◽  
Mycorrhizal Fungi ◽  
Block Design ◽  
Chemical Properties ◽  
Arbuscular Mycorrhizal ◽  
Production Costs ◽  
Soil Chemical Properties ◽  
Organic Fertilizers ◽  
Helianthus Annuus L

The use of organic fertilizers and the inoculation of mycorrhizal fungi in the cultivation of oil crops is essential to reduce production costs and minimize negative impacts on natural resources. A field experiment was conducted in an Argissolo Amarelo (Ultisol) with the aim of evaluating the effects of fertilizer application and inoculation of arbuscular mycorrhizal fungi on the growth attributes of sunflower (Helianthus annuus L.) and on soil chemical properties. The experiment was conducted at the Federal University of Rio Grande do Norte, Brazil, using a randomized block design with three replicates in a 4 × 2 factorial arrangement consisting of four treatments in regard to application of organic fertilizer (liquid biofertilizer, cow urine, mineral fertilizer, and unfertilized control) and two treatments in regard to arbuscular mycorrhizal fungi (with and without mycorrhizal fungi). The results showed that the physiological attributes of relative growth rate and leaf weight ratio were positively influenced by fertilization, compared to the control treatment, likely brought about by the supply of nutrients from the fertilizers applied. The growth and productivity attributes were positively affected by mycorrhization.

scholarly journals Growth and nutrient accumulation in mycorrhized papaya seedlings cultivated in a phosphorus-fertilized substrate

Revista CERES ◽  
2016 ◽  
Vol 63 (1) ◽  
pp. 86-94
Author(s):  
Dácio Jerônimo de Almeida ◽  
Walter Esfrain Pereira ◽  
Patrícia da Silva Alexandre ◽  
Járisson Cavalcante Nunes ◽  
Wagner de Melo Ferreira
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Dry Matter ◽  
Block Design ◽  
Arbuscular Mycorrhizal ◽  
Production Costs ◽  
Control Treatment ◽  
Mineral Fertilizers ◽  
Nutrient Accumulation ◽  
Promising Alternative

ABSTRACT The indiscriminate use of mineral fertilizers in papaya orchards has increased production costs, and the use of arbuscular mycorrhizal fungi is a promising alternative to reduce such expenses. Therefore, the present research aimed at studying the efficiency of arbuscular mycorrhizal fungi (AMF) on dry matter and nutrient accumulation in Sunrise Solo papaya seedlings, by applying doses of P2O5 (triple superphosphate) that are harmful to the symbiosis. The experiment was carried out in a protected environment and was set up in a randomized block design with four replications, and consisted of four P2O5 doses (0, 672, 1386 and 2100 mg dm-3), three mycorrhizal fungi species (Gigaspora margarita, Entrophospora colombiana and Scutellospora heterogama) and the control treatment (mycorrhiza-free). Shoot and root dry matter as well as nitrogen, phosphorus and potassium contents in leaf and root tissues were assessed. Mycorrhizal inoculation promoted a 30% increase in shoot dry matter in relation to the control treatment. Mycorrhizal fungi promoted increases in leaf and root nitrogen content up to 672 mg dm-3 P2O5. Inoculation of E. colombiana favored the highest gains in root and shoot dry matter. P2O5 fertilization increased foliar and root phosphorus content.

Efek Penggunaan Campuran Tepung Kulit Pisang Fermentasi, Bungkil Kelapa, dan Minyak Sawit Terhadap Bobot dan Persentase Organ Saluran Pencernaan dan Sirkulasi Itik Peking

2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Humaira Asra ◽  
Zulfan Zulfan ◽  
Muhammad Daud
Keyword(s):  
Block Design ◽  
Coconut Oil ◽  
Animal Husbandry ◽  
Partial Substitution ◽  
Banana Peel ◽  
Experimental Unit ◽  
Feed Supplement ◽  
Commercial Diet ◽  
Randomized Block Design ◽  
Coconut Meal

Abstrak.    Tujuan penelitian ini adalah untuk mengetahui efek penggunaan campuran tepung kulit pisang fermentasi,   bungkil kelapa,  minyak sawit, dan  feed supplement sebagai substitusi sebagian ransum komersil terhadap bobot dan persentase organ pencernaan dan sirkulasi itik peking.  Penelitian ini dilakukan di Laboratorium Lapangan Peternakan (LLP), Univeritas Syiah Kuala, tanggal  22 Februari‒19 April 2017.  Penelitian ini menggunakan 96 ekor anak itik peking (Day Old Duck).   Rancangan yang digunakan adalah  Rancangan Acak Kelompok dengan Subsampel (Randomized Block Design with Subsampling) terdiri dari 4 perlakuan, 4 kelompok, dan 2 subsampling.  Tiap kelompok merupakan unit percobaan,  masing-masing terdiri dari enam ekor itik.  Perlakuan yang  dicobakan adalah pemberian tepung kulit pisang fermentasi + bungkil kelapa + minyak sawit +  feed supplement sebanyak masing-masing 0% (P1),  4+2,5+0,5+1% (P2),  8+5+1+1% (P3),  dan 12+7,5+1,5+1% (P4).  Parameter yang diamati meliputi berat dan persentase organ pencernaan  (crop, gizzard, usus, hati, pancreas) dan organ sirkulasi (jantung, limpa, dan darah).  Hasil  penelitian memperlihatkan campuran tepung kulit pisang fermentasi sebanyak 12% ditambah bungkil kelapa 7,5%,  minyak kelapa 1,5%,  dan feed supplement  1%  dapat digunakan untuk mensubstitusi ransum komersil itik peking sampai 22%  selama periode pemeliharaan 3‒8 minggu tanpa berpengaruh nyata (P0,05) terhadap bobot dan persentase organ pencernaan dan sirkulasi itik peking. (Effect of  Inclusion of  Fermented  Banana Peel Meal to the Weights and Percentages of  Digestion and Circulatory Organs of  Peking Ducks)  Abstract.   The aim of present study was to determine effect of  inclusion of fermented banana  peel meal + coconut meal + coconut oil + feed supplement as partial substitution of  duck commercial diet  to the weights and percentages of  digestion and circulatory organs of peking ducks.  The study was conducted in Field Laboratory of Animal Husbandry,  Livestock Department,  Faculty of Agriculture, Syiah Kuala University,  February 22  until April 19, 2017.   As many as 96 peking DOD were used in this study.  The study was performed into randomized block design with subsamples (RBD with subsamples),  consisted of  4 treatments,   4  blocks,  and 2 subsamples.  Each group was an experimental unit, each consisting of six ducks.  The treatment was the inclusion of  fermented banana peel meal + coconut meal + coconut oil + feed supplement with the level of  0% (P1),  4+2,5+0,5+1% (P2),  8+5+1+1% (P3),  and 12+7,5+1,5+1% (P4), respectively.   The parameters observed were the weights and percentages of digestion organs (crop, gizzard, intestine,  liver, pancreas,) and circulatory organs  of  peking ducks.  The results of study showed that inclusion of  up to 12% fermented banana peel + 7,5% coconut meal + 1% coconut oil + 1% feed supplement as partial substitution of  commercial diet did not significantly (P0.05) affect on  the weights and percentages  of  digestion and circulatory organs of peking ducks.    

scholarly journals USO DE BIOATIVADOR ASSOCIADO À DOSAGENS DE FERTILIZANTE FOSFATADO NA CULTURA DO MILHO

Nativa ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 16-22
Author(s):  
César Ferreira Santos ◽  
Renato Soares Oliveira ◽  
Sheila Isabel do Carmo Pinto
Keyword(s):  
New Technologies ◽  
Block Design ◽  
Tropical Soils ◽  
Phosphate Fertilizer ◽  
Production Costs ◽  
Experimental Unit ◽  
Vegetative Development ◽  
Maize Production ◽  
Corn Plants ◽  
Ear Number

Os gastos com fertilizantes representam a maior parte dos custos de produção de grãos no Brasil. Cerca de 70% dos fertilizantes fosfatados adicionados aos solos são indisponibilizados pela fixação de P em constituintes mineralógicos dos solos tropicais. Novas tecnologias têm sido desenvolvidas visando reduzir esta fixação por meio da utilização de bioativadores de solo e planta. O presente trabalho teve por objetivo avaliar o efeito do bioativador e doses de fertilizante fosfatado sobre a produção do milho. O experimento foi conduzido no município de Bambuí em delineamento de blocos casualizados, com oito tratamentos e cinco repetições, totalizando quarenta unidades experimentais. Cada unidade experimental foi composta por quatro linhas de plantio com sete metros de comprimento, com espaçamento entre linhas de cinquenta centímetros. As variáveis avaliadas foram: altura das plantas, altura de inserção das espigas, diâmetro do colmo, comprimento da espiga, diâmetro da espiga, número de fileiras por espiga, número de grãos por fileira, massa de mil grãos, produtividade e os teores de P e K no solo. Nas condições em que o trabalho foi desenvolvido, observou-se que a adubação completa sem adição de bioativador proporcionou maior desenvolvimento vegetativo das plantas de milho, no entanto, sem conversão em aumento de produtividade. Palavras-chave: fósforo; bioestimulante; produtividade.   Use of bioactivator associated to phosphate fertilizer doses in corn culture   ABSTRACT: Fertilizer expenditures represent the bulk of grain production costs in Brazil. About 80% of the phosphate fertilizers added to the soils are consumed by fixing P to mineralogical constituents of the tropical soils. New technologies have been developed to reduce this fixation through the use of soil and plant bioactivators. The objective of this work was to evaluate the effect of the bioactivator and doses of phosphate fertilizer on maize production. The experiment was conducted in a randomized complete block design with eight treatments and five replicates, totaling forty experimental units. Each experimental unit was composed of four planting lines with seven meters in length, spaced between lines of fifty centimeters. The variables evaluated were: plant height, ear insertion height, stem diameter, ear length, ear diameter, number of rows per ear, number of grains per row, mass of one thousand grains, productivity and P and K in soil. Under the conditions in which the work was developed, it was observed that the complete fertilization without addition of bioactivator provided greater vegetative development of the corn plants, however, without conversion in increase of productivity. Key words: phosphorus; biostimulant; productivity.

Sign in / Sign up

Export Citation Format

Share Document