scholarly journals AVALIAÇÃO DE TRÊS MÉTODOS DE OBTENÇÃO DO ÍNDICE DE ÁREA FOLIAR PARA CULTURA DA SOJA

Nativa ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 284
Author(s):  
Ana Laura Pereira Souza ◽  
Marcelo Marques Costa ◽  
Darly Geraldo de Sena Junior ◽  
Rogério Borges de Oliveria Paz
Keyword(s):  
Leaf Area ◽  
Plant Density ◽  
Digital Images ◽  
Block Design ◽  
Linear Equations ◽  
Density Variation ◽  
Imaging Method ◽  
Area Index ◽  
Soybean Crop ◽  
Randomized Block Design

O Índice de área foliar (IAF) representa a eficiência na interceptação e utilização da radiação solar pelas plantas. O IAF pode ser obtido de forma direta, determinando-se a área foliar e área ocupada pela planta. Entretanto, métodos indiretos são comumente utilizados para sua estimativa devido a necessidade de praticidade. O objetivo deste trabalho foi avaliar a equivalência das estimativas do IAF obtidas por meio de um ceptômetro, pelo método de discos e utilizando imagens digitais. Para tanto, foi conduzido um experimento com a cultura da soja, no delineamento em blocos casualizados, com variação da densidade de plantas, para comparar os valores de IAF obtidos pelos diferentes métodos aos 34 dias após a semeadura (DAS). A comparação foi feita por meio dos coeficientes de equações lineares ajustadas entre os resultados obtidos. O método do disco e do ceptômetro, apresentaram uma boa equivalência entre seus valores. Entretanto, o método que utiliza imagens superestimou o IAF, não apresentando uma boa equivalência de seus valores aos do método de discos e ao ceptômetro.Palavras-chave: ceptômetro, discos foliares, imagens digitais. EVALUATION OF THREE OBTAINMENT METHODS OF FOLIAR AREA INDEX FOR SOYBEAN CROP ABSTRACT:The leaf area index (LAI) represents the interception efficiency and use of solar radiation by plants. IAF can be obtained directly, determining the leaf area and area occupied by the plant. However, indirect methods are commonly used for their estimation because for practicality. The objective of this work was to evaluate the equivalence of the LAI estimates obtained with a ceptometer, using the disc method and digital images. A experiment was conducted with soybean crop, in a randomized block design with plant density variation to compare the LAI values obtained by the different methods at 34 days after sowing (DAS). The comparison was made through the coefficients of linear equations adjusted between the results obtained. The disc and the ceptometer method presented a good equivalence between their values. However, the imaging method overestimated the LAI, not presenting a good equivalence of its values to those of the disc method and the ceptometer.Keywords: ceptometer, leaf discs, digital images.

scholarly journals ‘Prata-Anã’ banana under irrigation levels, planting densities and bunch trimming

2020 ◽  
Vol 42 (5) ◽  
Author(s):  
Sergio Luiz Rodrigues Donato ◽  
Marcelo Rocha dos Santos ◽  
Alessandro de Magalhães Arantes ◽  
Ariele Vaz Ramos
Keyword(s):  
Leaf Area ◽  
Plant Density ◽  
Block Design ◽  
Fruit Size ◽  
Fruit Weight ◽  
Production Cycle ◽  
Area Index ◽  
Irrigation Level ◽  
Randomized Block Design ◽  
Irrigation Levels

Abstract The objective of this study was to assess the effect of planting densities, irrigation levels and bunch trimming on yield, fruit grading and water-use efficiency (WUE) of ‘Prata-Anã’ banana plants. The following factors were combined in a randomized block design: three irrigation levels (IL), 50, 75 and 100% crop evapotranspiration (ETc); four planting densities (PD)- 1,666; 2,083; 2,666 and 3,333 plants ha-1; and two bunch trimming treatments (BT), removal of either one or two hands from the bunch. The treatments were arranged in a split-split plot design. Irrigation level was assigned to main plots, PD to subplots and BT to sub-subplots, with four replicates. Measurements were made in the first production cycle. Removing two hands increased number of leaves, leaf area, leaf area index, fruit weight, fruit diameter, total hand weight and mean hand weight of ‘Prata-Anã’ banana plants. A plant density population of 3,333 plants ha-1 combined with an irrigation level at 75% ETc improves plant development and yield while maintaining fruit size and saving water, regardless of removal of one or two hands from the bunch.

scholarly journals Improvement of Snap Beans Yield through the Application of N, P, K and Granule Organic Fertilizers on Inceptisols Soil

2020 ◽  
Vol 11 (3) ◽  
pp. 174-182
Author(s):  
Kusumiyati ◽  
Wawan Sutari ◽  
Arif Affan Wicaksono ◽  
Ade Risti Oktavia
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Block Design ◽  
Organic Fertilizer ◽  
Organic Fertilizers ◽  
Area Index ◽  
Snap Beans ◽  
Randomized Block Design ◽  
K Fertilizer ◽  
Pod Length

Balanced organic and inorganic fertilization is expected to improve low nutrient on Inceptisols to increased snap bean production. The effect of the combination of N, P, K, and granule organic fertilizer on bean harvests was the purpose of this study. The parameters were leaf area index (LDA), shoot-root ratio, the weight of pods, pod length, pod diameter, percentage of the number of pods, marketable and unmarketable,and percentage of pods by quality class. The experiment was conducted in February to April 2016 at Ciparanje Experimental Farm, Faculty of Agriculture, Padjadjaran Univeristy, Jatinangor. The study was conducted using a randomized block design (RBD) with 10 treatments and 3 replications. The experimental results showed that N, P, K fertilizer and granule organic fertilizer (GOF) in the order of Inceptisols significantly affected the weight of pods. Application 50% of the dosage N, P, K fertilizer combined with 50% dosage of granule organic fertilizer resulted in a higher pod weight per plot, which reached 2 439.84 g. Keywords: an organic fertilizer, granule organic fertilizer, leaf area index, quality grade, shoot-root ratio,

scholarly journals PERTUMBUHAN DAN PRODUKSI TANAMAN JAGUNG PROLIFIK PADA BERBAGAI JARAK TANAM DALAM BARIS DENGAN SISTEM TANAM JAJAR LEGOWO

2020 ◽  
Vol 4 (1) ◽  
pp. 13-23
Author(s):  
Intan Dwi Lestari
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Block Design ◽  
Stem Diameter ◽  
Growth And Yield ◽  
Area Index ◽  
Plant Weight ◽  
South Sulawesi ◽  
Randomized Block Design ◽  
Number Of Leaves

This research aimed to determine the effect of spacing on the growth and yield of corn. It was conducted from July to November 2019 at the Experimental Plantation of Cereal Crops Research Institute (BalitSereal), Maros, South Sulawesi. The experimental method used was a randomized block design consisting of 4 treatments: J1= (100 cm x 50 cm) x 20 cm, one seed per hole; J2= (100 cm x 50 cm) x 30 cm, alternating between one seed per hole and two seeds per hole; J3= (100 cm x 50 cm) x 40 cm, two seeds per hole; J4= (100 cm x 50 cm) x 15 cm, one seed per hole. The observed variables were plant height, number of leaves, stem diameter, leaf area index, Anthesis Silking Interval (ASI), length of cob 1 and cob 2, diameter of cob 1 and cob 2, weight of shelled seeds/plant, weight of 100 seeds on cob 1 and cob 2, and production of shelled seeds/hectare. The experimental results showed that plant spacing affected the growth and production of maize. The J3 spacing (100 cm x 50 cm) x 40 cm with two seeds per hole significantly affected the leaf area index and gave the highest average stem diameter. The J2 spacing with (100 cm x 50 cm) x 30 cm with alternating between one seed per hole and two seeds per hole produced the highest production in terms of weight of shelled seeds/plant, weight of 100 seeds and yield of shelled seeds/hectare.

scholarly journals Karakterisasi Morfofisiologi dan Hasil Minyak 10 Genotip Nilam (Pogostemon cablin Benth.)

2018 ◽  
Vol 6 (1) ◽  
pp. 40
Author(s):  
Retno Wulansari ◽  
Muhammad Tahir ◽  
Wiwik Indrawati ◽  
Dewi Riniarti
Keyword(s):  
Leaf Area ◽  
Phenotypic Variability ◽  
Block Design ◽  
High Yield ◽  
Area Index ◽  
Plant Laboratory ◽  
Physiological Character ◽  
Randomized Block Design ◽  
Pogostemon Cablin ◽  
New Genotype

Characterization of morphophysiology and oil yield of 10 patchouli genotypes (Pogostemon cablin Benth.) aims to test the morphology and physiology character of nine genotypes Aceh patchouli and one comparative clone (Lhokseumawe), obtain high yield oil clones (weight plant and essential oil content), and obtain genetic and phenotypic variabilities that can be used as a new genotype selection indicators. The research was conducted at Experimental Field and Plant Laboratory of the State Polytechnic of Lampung in April until November 2016. This research used Randomized Block Design (RBD) with 10 treatment levels and 3 replications.The LSI test results on the physiological character of the nine genotypes and one comparative clone showed that NPL 9 genotypes superior to the variables of the angle of petiole, chlorophyll content, leaf area, specific leaf area, and leaf area index. The NPL 9 genotypes resulted higher yield and rendement yields than other genotypes tested and one comparator, that was 2,36%. The character of stem production and rendement has a genetic variant value greater than the environmental variant. For genetic variability and phenotypic variability in the variables observed relatively uniform so that can not be used as an indicator of selection.   Keywords: Aceh patchouli, leaf character, selection indicator, variability of genotype, variability of phenotype

scholarly journals Penampilan Karakter Agronomi 16 Genotip Kedelai (Glycine max L. Merrill) pada Pertanaman Tumpangsari dengan Jagung (Zea mays L.) Pola 3:1

Jurnal Agro ◽  
10.15575/436 ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 30-40
Author(s):  
Acep Atma Wijaya ◽  
Hana D Rahayu ◽  
Adi R. H. Oksifa ◽  
Meddy Rachmadi ◽  
Agung Karuniawan
Keyword(s):  
Leaf Area ◽  
Block Design ◽  
Leaf Angle ◽  
Agricultural Commodity ◽  
Area Index ◽  
Soybean Genotype ◽  
Randomized Block Design ◽  
Best Response ◽  
Soybean Genotypes ◽  
Glycine Max L

Kedelai merupakan komoditas pertanian yang sangat penting di Indonesia. Namun, produksi kedelai nasional belum dapat memenuhi kebutuhan kedelai nasional. Upaya yang dapat dilakukan adalah dengan menerapkan pola tanam tumpangsari kedelai dengan jagung. Penelitian ini bertujuan untuk mencari genotip kedelai yang mampu beradaptasi pada pertanaman tumpangsari dengan jagung pola 3:1 serta menghitung produktivitas penggunaan lahan setiap genotip pada pertanaman tumpangsari dengan jagung pola 3:1. Penelitian ini menggunakan metode eksperimen Rancangan Acak Kelompok (RAK). 16 genotip kedelai digunakan sebagai perlakuan, dan diulang sebanyak dua kali. Untuk melihat respons genotip pada pertanaman tumpangsari dilakukan dengan uji Least Significant Increase (LSI) pada taraf signifikansi 5%. Pendugaan produktivitas lahan pada setiap genotip dihitung berdasarkan nilai Nisbah Kesetaraan Lahan. Hasil penelitian ini menunjukkan genotip kedelai yang memperlihatkan respons paling baik pada pertanaman tumpangsari kedelai jagung dibandingkan kultivar cek untuk tinggi tanaman yaitu genotip BTN 5 dan JT 3, karakter jumlah cabang produktif yaitu genotip BTN 5, karakter luas daun dan indeks luas daun yaitu genotip JT 3, karakter sudut daun yaitu genotip CK 6, karakter bobot per plot yaitu genotip KBI 2, dan Nisbah Kesetaraan Lahan yaitu genotip CK 6 dan KBI 2.Genotip   BTN 1, BTN 2, BTN 5, CK 15, CK 6, JT 3, KA 6, KA 7, KBI 2, KH 8, Cikuray dan Malikka memiliki nilai NKL lebih besar dari 1,0. Soybean is one of important agricultural commodity in Indonesia. However, the national soybean production is not sufficient to meet the needs of national soybean. Effort to do is by applying an intercropping soybean with corn. The objectives of the research was to find soybean genotypes that can adapt to intercropped plantation with corn in pattern of 3 : 1 as well as the productivity of the land use of each genotype in intercropping with maize in 3 : 1 pattern. The research used an experimental method randomized block design (RBD), 16 soybean genotypes as treatments, and repeated twice. To see the response of genotype in intercropping planting was done by using Least Significant Increase (LSI) at the level of significant 5%. Estimation of land productivity on each genotype was calculated with Land Equation Ratio value. The results showed that the best response of soybean genotype compared checks cultivar for plant height were genotype BTN 5 and JT 3, character number of productive branches was genotype BTN 5, the character of leaf area and leaf area index was genotype JT 3 , leaf angle character was genotype CK 6, characters of weights per plot was KBI 2 genotype and Land Equation Ratio value were  CK 6 and KBI 2. Genotypes of BTN 1, BTN 2, BTN 5, CK 15, CK 6, JT 3, KA 6, KA 7, KBI 2, KH 8, Cikuray and Malikka had Land Equivalent Ratio values greater than 1.0.

scholarly journals The production of Physalis spp. seedlings grown under different-colored shade nets

2016 ◽  
Vol 38 (2) ◽  
pp. 257 ◽  
Author(s):  
Daniel Fernandes da Silva ◽  
Rafael Pio ◽  
Joyce Dória Rodrigues Soares ◽  
Paulyene Vieira Nogueira ◽  
Pedro Maranha Peche ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Block Design ◽  
Dry Mass ◽  
Additional Treatment ◽  
Light Spectrum ◽  
Treatment Control ◽  
Area Index ◽  
Randomized Block Design ◽  
Number Of Leaves

The objective of this study was to evaluate the production of seedlings of Physalis L. species under different-colored shade nets. Four shade nets individually stained white, blue, red and black, all with 50% shading, were used in this study, and an additional  treatment (control) was used in which seedlings were grown in full sun. The study examined four species of Physalis, namely, P. peruviana, P. pubescens, P. minima and P. ixocarpa. The experiment followed a randomized block design with three blocks and 25 seeds per plot. The species were sown in styrofoam trays. Germination was monitored daily to calculate the Emergency Velocity Index (EVI) and stabilize the overall percentage of emergence. Height, stem diameter, number of leaves, leaf area index and dry mass of seedlings were assessed at 50 days after sowing. The study found that these species react differently to changes in the light spectrum. Seedlings of P. peruviana should be grown under a white or red shade net; of P. pubescens under a white or black shade net; of P. minima under a white, red or black shade net; and of P. ixocarpa under a white shade net. For all species, 50% shade should be used. 

PENGARUH JARAK TANAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KACANG TANAH (Arachis hipogaea L.)

AGRICA ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 12-21
Author(s):  
Josina Irene Brigetha Hutubessy
Keyword(s):  
Leaf Area ◽  
Seed Weight ◽  
Block Design ◽  
Growth And Yield ◽  
Area Index ◽  
Fresh Seed ◽  
Randomized Block Design ◽  
Maximal Yield ◽  
Number Of Leaves ◽  
Planting Distance

This research aims at investigating the influence of planting distance towards growth and yield of peanut and optimal planting distance that can raise the growth of peanut seeds. The method used was Randomized Block Design with treatment as follows: J1 = planting distance 10 cm x 15 cm, J 2 = planting distance 15 cm x 15 cm, J 3 = planting distance 10 cm x 20 cm 4, J = planting distance 15 cm x 20 cm, J 5 planting distance = 10 cm x 30 cm, J 6 = 15 cm x 30 cm. Observation Variables in this study are the height of the plant, a number of leaves, leaf area, leaf area index, Podsnumber/Tan, pods weight/Tan, Seedsnumber /Tan, Fresh Seed Weight/Ha, Dry Seed Weight/Tan, heavy Seed dry/Ha, Fresh maximal yield and residues weight/Tan, dry maximal yield and residue/Ha. The result of this experiment found that the use of distance planting can give a good influence on each variable observation, both on the observation of growth as well as on the yield of peanut.

scholarly journals Evaluating the effect of plant population densities and nitrogen application on the leaf area index of maize in a reclaimed wetland in Kenya

2016 ◽  
Vol 8 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Catherine Waithira Njuguna ◽  
Hellen Wangechi Kamiri ◽  
John Robert Okalebo ◽  
Wilson Ngetich ◽  
Syphilline Kebeney
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Plant Density ◽  
Block Design ◽  
Nitrogen Application ◽  
Maize Production ◽  
Area Index ◽  
High Plant Density ◽  
Plant Densities ◽  
Set Up

Abstract Maize is the main staple food in Kenya with over 90% of Kenyans relying on it. While the annual national consumption is increasing, the production of this crop has been on the decline in the last two decades. Maize production in Kenya fell by 33.4% in 2013 with Nyeri among the counties said to be grappling with the production of this crop. Land pressure is one of the major causes of decreased availability of food as well as soil depletion and encroachment upon fragile ecosystems such as wetlands. Nitrogen is a key nutrient in the production of maize, and its deficiency is a major factor limiting its production. This study investigated the effect of N application at 120 kg N/ha and maize density on the Leaf Area Index in reclaimed wetland soils in an experimental set-up comprising a randomized complete block design with three replications. The research was carried out in Nyeri County, Kenya. Leaf Area Index (LAI) was determined using the given SunScan formula. Measurements were done continuously until crop physiological maturity. Results indicated that the leaf area index increased with nitrogen application and reduced with spacing for most treatments. There were no significant differences between the two methods (Copy Method and SunScan). Leaf Area Index (LAI) was high in treatments containing nitrogen and high plant density. It was concluded that high plant density gives high LAI. 50 cm * 12.5 cm (-N) and 50 cm * 12.5 cm (+N) are the recommended plant densities for the site.

Plant density and intra-row spacing effects on phenology, dry matter accumulation and leaf area index of maize in second cropping

Biologija ◽  
2016 ◽  
Vol 62 (1) ◽  
Author(s):  
Raouf Seyed Sharifi ◽  
Ali Namvar
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Dry Matter ◽  
Plant Density ◽  
Block Design ◽  
Row Spacing ◽  
Dry Matter Accumulation ◽  
Maize Production ◽  
Area Index ◽  
Spacing Effects

Crop phenology is one of the most important aspects of crop yield determination and it is essential to predicting physiological responses under varying field conditions. In order to evaluate plant density and intra-row spacing effects on phenology, dry matter accumulation, and leaf area index of maize in second cropping, a factorial experiment based on randomized complete block design was conducted at the research farm of the University of Mohaghegh Ardabili. Experimental factors were: plant population at three levels (7, 9, and 11 plants m–2) with three levels of intra-row spacing (45, 60, and 75 cm). The results showed that the maximum plant height (179.07  cm), total dry matter (592  g  m–2) in 83–91 days after sowing, days to 50% anthesis (45 days), days to 50% silking (50 days), LAI (4.07) in 63–70 days after sowing were observed in the plots with 11 plants m–2 and intra-row spacing of 45 cm. Based on the results, it was concluded that application of 11 plants m–2 with row spacing of 45 cm can be recommended for profitable maize production.

scholarly journals APPLICATION OF FERTILIZATION TIME AND NITROGEN DOSAGE ON PEANUT PLANT (Arachis hypogaea L.)

2017 ◽  
Vol 1 (1) ◽  
pp. 27
Author(s):  
Anak Agung Sagung Putri Risa Andriani ◽  
I Nengah Suaria ◽  
I Wayan Yudiana ◽  
Yohanes Parlindungan Situmeang ◽  
Anak Agung Ngurah Mayun Wirajaya ◽  
...  
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Block Design ◽  
Dry Weight ◽  
Growth And Yield ◽  
Leaf Number ◽  
Optimum Dose ◽  
Area Index ◽  
Randomized Block Design ◽  
Arachis Hypogaea L

Abstract This study aims to determine the effect of treatment of fertilization time and dosage of nitrogen to the growth and yield of peanut plants. This experiment is a two-factor experiment with incomplete randomized block design. The first factor is the time (S) of fertilizer consisting of three levels: During planting (S0), 15 days after planting (S1), 30 days after planting (S2), The second factor is the dosage of Nitrogen (N) fertilizer consisting of three levels: 25 kg/ha (N1), 50 kg/ha (N2). The results showed that treatment of fertilization time and a dose of nitrogen showed no significant effect on plant height, maximum leaf number, leaf area index, the total pod containing, total void pod, total pod number, oven dry weight of oven plants, and harvesting index. The interaction of nitrogen dose with a time of fertilization gave a very real effect to most observed variables except for maximum plant height, maximum leaf number, leaf area, harvest index that is not significant. The high dry weight of seed oven per plant was obtained at the fertilizer interaction treatment at 15 days after planting and the dose of nitrogen 25 kg/ha was 30.33 g and or increased by 152.75% and when compared with the control of 12.00 g. From a result of regression analysis got an optimum dose of nitrogen fertilizer that is 34.15 kg/ha with the dry weight of oven seeds per plant maximum 26.73 g. Keywords: Fertilization time, nitrogen dosage, peanut result

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