PENGARUH POPULASI TANAMAN TERHADAP SIFAT AGRONOMIS SERTA KADAR Cl DAUN TEMBAKAU VIRGINIA RAJANGAN PADA TANAH VERTISOLS DI BOJONEGORO

2020 ◽  
Vol 9 (4) ◽  
pp. 129
Author(s):  
ABDUL RACHMAN ◽  
NFN MAHFUDZ
Keyword(s):  
Nicotiana Tabacum ◽  
Tobacco Plant ◽  
Block Design ◽  
Plant Population ◽  
Tobacco Leaves ◽  
Randomized Block Design ◽  
Leaf Yield ◽  
Curing Method ◽  
Agronomic Characteristic ◽  
Grade Index

<p>Percobaan lapang telah dilakukan pada tanah vetisol di Kebun Percobaan Pekuwon, Bojonegoro, dimulai Mei sampai September 1996, untuk mempelajari pengaruh populasi tanaman tembakau terhadap sifat agronomis dan kadar Cl daun tanaman tembakau Virginia yang diolah dengan cara dirajang. Tinggi tempat dari lahan percobaan 13 m dpi, dan dengan tipe iklim D. Tanah bertekstur liat dengan 80% liat, 15% debu dan 5% pasir, 0.62% C-organik, 0.10% N, dan pH 8.20. Percobaan disusun dalam ancangan acak kelompok dengan 4 ulangan. Perlakuan terdiri dari enam laraf populasi tanaman tembakau (12 000; 18 000; 24 000; 36 000; 48 000, dan 60 000 tanaman per ha atau setara dengan 144, 216, 288, 432, 576, dan 720 tanaman per petak). Ukuran petak 12 m x 10 m. Dalam percobaan ini akan dipelajari pula pengaruh bentuk hasil (rajangan dan krosok) terhadap kadar Cl daun. Sepuluh tanaman per petak diolah secara lue-cuing di dalam oven mini, untuk dianalisis kadar Cl daunnya. Varietas tembakau adalah DB 101. Hasil dan indeks tanaman masih terus meningkat sampai populasi tetinggi, sedangkan mutu dan rendemen tidak terpengaruh oleh peningkatan populasi. Peningkatan populasi sebaliknya menurunkan ukuran daun, bobot tiap daun, tinggi tanaman, lingkar batang, dan jumlah daun yang dapat dipanen. Berdasar hasil, mutu dan mudahnya pengelolaan di lapang populasi yang optimal adalah 24 000 tanaman per ha, untuk tembakau Virginia rajangan di Bojonegoro. Peningkatan populasi hanya berpengaruh pada kadar Cl daun atas saja. Sedangkan bentuk hasil tembakau ajangan dan krosok tidak berpengaruh pada kadar Cl daun.</p><p>Kata kunci: Nicotiana tabacum, tembakau. tembakau Virginia rajangan, populasi tanaman, vertisols, sifat agronomis, kadar Cl, bentuk olahan</p><p> </p><p><strong>ABSTRACT </strong></p><p><strong>Effect of plant population on agronomic characteristics and leaf Cl content of sliced Virginia tobacco grown in vertisols of Bojonegoro</strong></p><p>The expeiment was conducted in vetisol soil of Bojonegoro in 1996 to study the effect of plant population on agronomic characteistics and Cl content of sliced tobacco leaves. The experiment was site located 13 m above sea level, with D climatic type. The soil characteristics were clay texture with 80% clay, 15% silt and 5% sand, 0.62% C-organic, 0.10 % N, and pH 8.2. The treatment consisted of six plant populations (12.000 up to 60.000 plants per ha equal with 144, 216, 288, 432, 576, and 720 plants per plot) was arranged in a randomized block design, with four replications. Plot size was 12 m x 10 m. Plant population per plo( based on the six treatment levels. For Cl content analysis, 10 plants plot was also taken to be processed with lue-curing method in mini oven. Tobacco variety was DB 101. Yield and crop index increased steadily as plant population increased up to the highest plant population. However the increase in plant population decreased the size, weight, number of leaves, and plant height. While grade index, percentage of dry to fresh leaf yield and Cl content of lower and middle leaves were not affected by the increase in plant population. Base on yield, quality, and easier management, the recommended plant population was 24 000 plant per ha. The increase in plant population only affected the Cl content of upper leaves. The form of sliced and lue-cured tobacco leaves did not affect the Cl content of (he leaves.</p><p>Key words : Nicotiana tabacum, tobacco, sliced Virginia tobacco, plant population vetisols, agronomic characteristic, Cl contcnl, product form</p>

Artan Dozlarda Magnezyum Sülfat Uygulamalarının Tütün Bitkisinin Yaprak Verimi ve Kalitesine Etkisi

2021 ◽  
Vol 9 (3) ◽  
pp. 601-606
Author(s):  
Ahmet Kınay ◽  
Halil Erdem
Keyword(s):  
Block Design ◽  
Field Conditions ◽  
Leaf Quality ◽  
Tobacco Leaves ◽  
Nicotine Concentration ◽  
Randomized Block Design ◽  
Leaf Yield ◽  
Tobacco Cultivar ◽  
Harvest Maturity

This research was carried out to determine the effects of fertilizers with MgSO4 applied in the increasing amounts (0, 3, 6 and 9 kg da-1) on the leaf yield, leaf quality and some chemical (Mg, S, N, P, K, nicotine, sugar, chlorogenic and rutin concentration) parameters of tobacco in the field conditions of Tokat/Erbaa and Tokat/Kazova locations in 2017 year. The research was established in three replications according to the randomized block design, and the leaves that reached the harvest maturity were harvested in three hands. According to the results, with increasing doses of MgSO4 application, there was an increase in the leaf yield of the tobacco cultivar grown in Erbaa and Kazova locations. The increase in leaf yield was seen at the dose of 6 kg da-1 of MgSO4 and this increase was 22% in Erbaa location and 6.4% in Kazova location. It was observed that increasing MgSO4 applications caused statistically significant increases in leaf Mg and S concentrations, and the highest increase was observed in the leaf yield at a dose of 6 kg da-1. Nicotine concentration, which is a very important alkaloid component for tobacco, caused a decrease in both locations with MgSO4 application. The results revealed that increasing doses of MgSO4 caused an increase in the yield of tobacco leaves, an increase in leaf Mg and S concentrations, and a decrease in nicotine concentrations.

scholarly journals STUDI POPULASI OPTIMAL PADA TEMBAKAU MADURA DENGAN CARA PANEN SATU KALI

2020 ◽  
Vol 9 (3) ◽  
pp. 98
Author(s):  
ABDUL RACHMAN ◽  
. SUWARSO
Keyword(s):  
Nicotiana Tabacum ◽  
Block Design ◽  
Sugar Content ◽  
Soil Characteristics ◽  
Plant Population ◽  
Leaf Number ◽  
Plant Spacing ◽  
Organic C ◽  
Leaf Yield ◽  
Harvesting Method

<p>Percobaan dilakukan di dua tempat dengan perbedaan tipe lahan di Kabupaten Sumencp, P. Madura, unluk mempclajari pengaruh populasi tanam terhadap sifat agronomis dan kimia dari dua varietas tembakau madura Percobaan dilakukan pada tahun 1990 (Mei s/d September), dengan cara panen salu kali, di Desa Guluk-guluk mewakili lahan gunung dengan clevasi 235 m, dan di Desa Kambingan Barat mewakili lahan legal (lahan kering) dengan clevasi 15 m. Sifat tanah dari lahan gunung adalah betcksiur liat, dengan 55% liat, 29% debu, 16% pasir, 0 62% C-organik, 0.11% N, dan pi I 7.5; dan di lahan tcgal adalah betckstur lempung berliat, dengan 34% liat 38% debu, 28% pasir, 0.55% C-organik, 0.09% N, dan pH 6.9. Perlakuan terdiri atas dua variclas tembakau madura (Prancak dan Berbedih) dan tiga taraf populasi tanaman (25 000, 33 000, dan 41 000 tanaman per ha). Perlakuan disusun dalam rancangan acak kelompok faktorial, dengan empat ulangan. Hasil percobaan menunjukkan bahwa pada lahan gunung variclas Prancak memberikan hasil krosok dan kadar Cl daun yang lebih tinggi dan pada varietas Berbedih. telapi variclas Berbedih memberikan jumlah daun dan kadar nikotin yang lebih tinggi dari pada varietas Prancak. Sifat lain dari kedua varietas tersebut adalah sama. Peningkatan populasi tanam meningkatkan hasil daun rajangan dan krosok. telapi menurunkan ukuran lebar daun Sebagian besar sifat-sifat tembakau tidak terpengaruh oleh kenaikan populasi. Populasi tanam yang sesuai untuk lahan gunung adalah 41 000 tanaman/ha, atau dengan jarak tanam (90 cm x 45 cm)/2 x 45 cm. Pada lahan legal varietas Prancak memberikan hasil krosok yang lebih linggi dari pada varietas Berbedih, tetapi varietas Prancak lebih rendah dalam hal jumlah daun, kadar nikotin dan gula dari pada varietas Berbedih Sifal yang lainnya dari kedua varietas tersebut adalah sama. Peningkatan populasi lanam di lahan legal meningkatkan ukuran tinggi tanaman dan hasil krosok Sebagian besar sifat tembakau tidak terpengaruh oleh peningkatan populasi. Populasi yang sesuai untuk lahan tcgal adalah 33 000 tanaman/ha, atau dengan jarak lanam (90 cm x 45 cm)/2 x 40 cm.</p><p>Kata kunci: Nicotiana tabacum, tembakau madura, populasi lanam, varietas, tipe lahan</p><p> </p><p><strong>ABSTRACT </strong></p><p><strong>Study on optimal plant population of madura tobacco in one harvesting method</strong></p><p>The experiment was conducted in two locations with different type of land, in Sumenep Regency, Madura Island, to study the effect of plant populations on agronomic and chemical characteristics of two madura tobacco varieties. This experiment was conducted in 1990 (May to September) on madura tobacco in one harvesting method, in Guluk-guluk Village represented hilly land lypc at the elevation of 235 m, and in Kambingan Barat Village represented upland type at the elevation of 15 m The soil characteristics of hilly land is clay texture with 55% clay, 29% silt, 28% sand, 0.62% organic-C. 0.11% N, and pll 7.5; and the soil characteristics of upland is clay loam texture with 34% clay, 38% silt, 28% sand, 0.55% organic-C, 0.06% N, and pH 6.9. The treatment consislcd of two varieties of madura tobacco (Prancak and Berbedih) and three plant population rates (25 000, 33 000 and 41 000 plants/ha). The treatments were arranged in factorial randomized block design with four replications. The result showed that in hilly land, Prancak gave more dry leaf yield and leaf Cl content than thai of Berbedih, but Prancak gave less leaf number and leaf nicotine content than Berbedih Other characters of the two varieties were similar. Increasing plant population increased cut and dry leaf yield, but decreased leaf width. Most of tobacco characters were not affected by increasing plant population. Appropriate plant population for hilly land tobacco was 41 000 plants/ha or with plant spacing of (90 cm x 45 cm)/2 x 40 cm. In upland, Prancak gave more dry leaf yield more lhan Berbedih, but Prancak gave less leaf number, nicotine and sugar content than Berbedih. Other characters of the two varieties was similar. Increasing plant population increased plant height and dry leaf yield. Most of tobacco characters were not affected by increasing plant population. Appropriate plant population for upland tobacco was 33 000 plants/ha or with plant spacing of (90 cm x 45 cm)/2 x 45 cm.</p><p>Key words : Nicotiana tabacum, madura tobacco, plant population, variety, land type</p>

PENGARUH POPULASI TANAMAN DAN PENGGUNAAN MULSA TERHADAP POPULASI GULMA DAN HASIL PUCIL JAGUNG MANIS (ZEA MAYS SACCHARATA STURT) DI LAHAN KERING

AGRICA ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 124-133
Author(s):  
I Ketut Arsa Wijaya
Keyword(s):  
Zea Mays ◽  
Block Design ◽  
Plant Population ◽  
Cyperus Rotundus ◽  
Corn Kernel ◽  
Plastic Mulch ◽  
Rice Plants ◽  
Straw Mulch ◽  
Combination Treatments ◽  
Randomized Block Design

This study was conducted in Balai Benih Induk (BBI) Luwus, Baturiti District, Tabanan Regency, with the high of place 506m above sea level occurring in March to May 2014. This research used randomized block design arranged per factor, namely population of plants (P) including three steps: P1=80.000 plants per hectare, P2= 100.00 plants per hectare, P3= 120.000 per hectare; and mulch (M) that include: M0= without mulch and without cleaning, M1= without mulch with clean weeding, M2= rice plants straw mulch (5 ton per hectare) and M3= black silver plastic mulch. Eventually, there were 12 combination treatments, each of which was repeated 3 times to obtain 36 land slots. The research indicates that there was no real interaction between the treatment of plant population and mulch usage in all variables observed. The 100.000 plant population per hectare can produce the weight of dry and fresh oven corn kernel without highest cornhusk that was to say 4.79 tons and 0.53 tons or 11.66 % and 20.45% higher compared to 120.000 plant population per hectare. The use of black silver plastic and rice plants straw mulch can produce the weight of fresh and dry oven corn kernel without cornhusk per hectare each of which is 4.69 tons, 4.57 tons, and 0.54 tons, 0.47 tons or 26.76%, 38.46 %, and 23.51 %, 20.51 % higher than without mulch and without clean weeding. Clean weeding treatment can produce the weight of fresh and dry oven corn kernel without cornhusk per hectare with its weight of 4.63 tons and 0.51 tons or 25.35 % and 35.90 % higher than without mulch and cleaning. Clean weeding treatment was not obviously different from mulch treatment. The identification of weed types were 19 kinds of weeds and Cyperus rotundus L. Weeds. They have the highest density and each absolute frequent of 1249.333 stems m-2 and 1.00.

scholarly journals PEMANFAATAN EKSTRAK DAUN TEMBAKAU (Nicotiana tabacum L) UNTUK MENGENDALIKAN ULAT GRAYAK (Spodoptera litura F) PADA TANAMAN SAWI (Brassica juncea L.) DI LAPANG

AGRICA ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 1-8
Author(s):  
Maria Goreti Firma
Keyword(s):  
Spodoptera Litura ◽  
Leaf Extract ◽  
Tobacco Plant ◽  
Block Design ◽  
Fresh Weight ◽  
Leaf Extracts ◽  
Tobacco Leaf ◽  
Randomized Block Design ◽  
Nicotiana Tabacum L ◽  
Mustard Plant

This study aims to determine the effect of tobacco plant extracts on mortality of armyworm pests (Spodoptera litura F.) and determine the optimum concentration of tobacco leaf extracts on mortality of armyworm caterpillars on mustard plants in the field. The design used in this study was a Randomized Block Design (RBD) consisting of 5 treatments and 4 replications namely T1: 175 ml/L concentration of tobacco leaf extract, T2: 350 ml/L concentration of tobacco leaf extract T3: Concentration of 525 ml/L tobacco leaf extract, T4: Concentration of 700 ml/L tobacco leaf extract, T5: Concentration of 875 ml/L of tobacco leaf extract. The observation variables in this study were pest mortality (%), damage intensity (%), plant fresh weight, and fresh weight per hectare (ton). The results showed that the concentration of tobacco leaf extracts significantly affected the mortality of Spodoptera litura F. At the concentration of T5 treatment (875 ml) were the lowest damage, pest mortality, fresh weight of the mustard plant, and fresh weight per hectare of was 9.75%, 88%, 109.25 gr, and27.31 tons respectively.

RESPONSE OF CIGAR TOBACCO TO DIFFERENT DATES OF PLANTING AND SPACING

1975 ◽  
Vol 55 (1) ◽  
pp. 303-308
Author(s):  
V. KOZUMPLIK ◽  
P. P. LUKOSEVICIUS
Keyword(s):  
Nicotiana Tabacum ◽  
Chemical Characteristics ◽  
Breeding Line ◽  
Total Alkaloids ◽  
Nicotiana Tabacum L ◽  
Leaf Yield ◽  
Number Of Leaves ◽  
Planting Distance ◽  
Grade Index

Response of cigar tobacco (Nicotiana tabacum L.) in morphological, agronomic and chemical characteristics to date of planting and planting distance was studied during 1971–73. A cultivar and a breeding line of cigar tobacco were transplanted outdoors on 26 May, 9 (or 12) June and 23 June. The tobacco was spaced 36, 41 and 46 cm in rows that were 97 cm apart. The best results were obtained when cigar tobacco was transplanted not later than 9 June, and the plants were spaced 41 cm in the rows that were 97 cm apart. The highest number of leaves per plant, cured-leaf yield, percentage of nicotine and total alkaloids were obtained from the tobacco transplanted on the first or second date in 3 yr. In 2 yr, the later tobacco had the tallest plants, the largest leaves, the highest percent filler leaf, grade and crop index. Earlier-transplanted tobacco was harvested earlier, although the period to flower decreased with later date of planting. On the average, the tobacco spaced 41 cm was taller and had a shorter period to flower, and higher yield and crop index than that spaced 36 cm or 46 cm. Grade index, percent filler leaf, nicotine and total alkaloids were affected significantly by the distance in 1 yr only.

scholarly journals PENGARUH PENYAKIT KRUPUK TERHADAP HASIL DAN MUTU DELAPAN VARIETAS TEMBAKAU VIRGINIA

2020 ◽  
Vol 6 (2) ◽  
pp. 33
Author(s):  
GEMBONG DALMADIYO ◽  
MOCH. AMIR KARTAMIDJAJA
Keyword(s):  
Block Design ◽  
Susceptible Variety ◽  
Diseased Plant ◽  
Yield And Quality ◽  
Randomized Block Design ◽  
Resistant Varieties ◽  
Tobacco Seedlings ◽  
Grade Index ◽  
Leaf Curl Disease

<p><strong>The effect of tobacco curl disease on the yield and quality of eight Virginia tobacco varieties</strong></p><p>Tobacco leaf curl disease is one of the important diseases on Virginia tobacco which especially occurs in dry condition. The use of resistant varieties is one of the most effective way to control the disease. This experiment was lo evaluate the effect of tobacco curl disease on tobacco varieties (DB 101, Coker 319, Coker 176, Coker 48, Coker 86, and Coker 371 Gold) and two promising lines (T.45/T.65 and T.45/T.69). The experiment was conducted in Pekuwon, Sumberrejo, Bojonegoro from April to October 1997. The experiment was arranged in randomized block design with three replications. The tobacco seedlings wee transplanted in 0.9 m x 0.6 m spacing and 9.0 m x 9.0 m plot size. The fertilizer dosage applied are 300 kg ZA + 108 kg SP-36 + 156 kg ZK per ha The parameters observed including percentage of diseased plant, productive leaves, as well as the yield and quality of leaves. The esults showed that Coker 371 Gold variety showed the lowest disease percentage (6.89%), decrease in productive leaves was high (71.86%), Whereas the two promising lines, were T.45/T.6S and T.45/T.69 showed that the percentage of diseased plants wee not significantly different compared with DB 101, Coker 319, and Coker 48, but the decrease in productive leaves was lower. The yield of these promising lines were 10.12-10.30 kg/81 m!, grade indexes 86.04-87.27, and crop indexes are 88.31-88.63. Coker 176 was the most susceptible variety. The percentage of diseased plant, flue- cured yield, grade index, and crop index on Coker 176 wee 42.67%, 7.77 kg/81 m!, 86.09, and 66.89, respectively.</p>

scholarly journals Vegetative and productive performance of two soybean cultivars at different plant densities

2021 ◽  
Vol 7 ◽  
pp. 1-12
Author(s):  
Gustavo Lourenço Bomtempo ◽  
Éder Matsuo ◽  
Mario Carmo Oda
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Spatial Arrangement ◽  
Plant Population ◽  
Productive Performance ◽  
Soybean Cultivars ◽  
Randomized Block Design ◽  
Plant Densities ◽  
Set Up ◽  
Number Of Branches

The spatial arrangement and plant population have been highlighted as fundamental tools for increasing productivity. The objective was to evaluate the vegetative and productive performance of two soybean cultivars at different plant densities. Seeds of soybean cultivars (TMG 7063 IPRO and BS 2606 IPRO), recommended for the Alto Paranaíba region in the state Minas Gerais, were used and sown at seven different densities (8, 10, 12, 14, 16, 18 and 20 plants meter-1, equivalent to 160, 200, 240, 280, 280, 320, 360 and 400 thousand plants hectare-1, where they were evaluated in the development stages R1 (plant height) and R8 (height of the insertion of the first pod, plant height, number of nodes, number of branches, productivity per plant and productivity per hectare). The experiment was set up according to a randomized block design, in the factorial scheme A x B, being factor A composed by the cultivars and factor B by plant densities with three repetitions (blocks). Increased plant population resulted in greater first pod insertion height and final plant height, fewer nodes and branches and the average yield per hectare increased linearly, with the TMG 7063 IPRO cultivar being more productive under these conditions (52.7 bags of 60 kg per hectare).

scholarly journals Peanut mechanized digging regarding to plant population and soil water level

2014 ◽  
Vol 18 (4) ◽  
pp. 459-465 ◽  
Author(s):  
Cristiano Zerbato ◽  
Vicente F. A. Silva ◽  
Luma S. Torres ◽  
Rouverson P. da Silva ◽  
Carlos E. A. Furlani
Keyword(s):  
Water Content ◽  
Water Level ◽  
Soil Water ◽  
Soil Water Content ◽  
Material Flow ◽  
Block Design ◽  
Plant Population ◽  
Plant Populations ◽  
Randomized Block Design

The largest losses in mechanical harvesting of peanuts occur during the stage of digging, and its assessment is still incipient in Brazil. Therefore, the aim of this study was to evaluate the quantitative losses and the performance of the tractor-digger-inverter, according to soil water content and plant populations. The experiment was conducted in a completely randomized block design with a factorial scheme 2 x 3, in which the treatments consisted of two soil, water content (19.3 and 24.8%) and three populations of plants (86,111, 127,603 and 141,144 plants ha-1), with four replications. The quantitative digging losses and the set mechanized performance were evaluated. The largest amount of visible and total losses was found in the population of 141.144 plants ha-1 for the 19.3% soil water content. The harvested material flow and the tractor-digger-inverter performance were not influenced by soil water content and plant population. The water content in the pods was higher in 24.8% soil water content only for the population of 86,111 plants ha-1; the yield was higher in the populations of 141.144 and 127.603 plants ha-1, in the 19.3 e 24.8% soil water content, respectively.

scholarly journals Growth and yield of rice fields with posbidik compost and jajar legowo planting system

2021 ◽  
Vol 2 (1) ◽  
pp. 1-9
Author(s):  
I Ketut Suweta ◽  
Hertasning Yatim ◽  
Mihwan Sataral
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Plant Population ◽  
Rice Production ◽  
Lowland Rice ◽  
Growth And Yield ◽  
Innovative Product ◽  
Rice Varieties ◽  
Randomized Block Design ◽  
Planting System

Posbidik compost is an innovative product that is expected to solve the scarcity of subsidized fertilizers for farmers. The principle of the jajar legowo planting system is to increase plant population and lowland rice production. This study aimed to determine the influence of posbidik compost and jajar legowo planting system on the growth and yield of Ciherang rice varieties. This study was conducted on irrigation paddy fields owned by farmers in West Toili District, Banggai Regency, in August-December 2020. This study used a factorial randomized block design consisting of 2 factors, namely posbidik compost consisting of 3 levels, namely: K1 = 5 tons/ha; K2 = 7.5 tons/ha; K3 = 10 tons / ha, and planting system legowo 2:1 line consisting of 3 levels, namely: L1 = 20 x 10 x 40 cm; L2 = 25 x 12.5 x 50 cm; L3 = 30 x 15 x 60 cm. The results showed that the interaction of posbidik compost and jajar legowo planting system does not affect the plant height; however, it affects the number of productive tillers, the weight of 1000 grains and productivity. The results showed that the best performance of the yield rice in the treatments of 7.5 tons/ha posbidik dose with planting space of 25 x 12.5 x 50 cm.

scholarly journals AGRONOMIC PERFORMANCE OF COWPEA CULTIVARS DEPENDING ON SOWING SEASONS IN THE CERRADO BIOME

2017 ◽  
Vol 30 (2) ◽  
pp. 361-369 ◽  
Author(s):  
FERNANDO DA SILVA ALMEIDA ◽  
FÁBIO LUIZ CHECCHIO MINGOTTE ◽  
LEANDRO BORGES LEMOS ◽  
MÁRCIO JOSÉ DE SANTANA
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Plant Population ◽  
Agronomic Performance ◽  
Grain Yields ◽  
Cerrado Biome ◽  
Cowpea Cultivars ◽  
Randomized Block Design ◽  
Full Flowering ◽  
Pod Length

ABSTRACT The objective of this work was to assess the agronomic performance of cowpea cultivars depending on sowing seasons in the Cerrado biome. Thus, an experiment was conducted in Uberaba, State of Minas Gerais, Brazil, in a complete randomized block design, in a 6x3 factorial arrangement, using six cowpea cultivars (BRS-Itaim, BRS-Guariba, BRS-Potengi, BRS-Cauamé, BRS-Novaera and BRS-Tumucumaque) and three sowing seasons (Dec 14, 2012; Jan 14, 2013; and Feb 14, 2013), with four replications. The interaction between the cultivars and sowing seasons was assessed regarding the number of days for full flowering, number of days for pod maturation, number of trifoliate leaves, height of the first pod -bearing node, pod length, number of pods per plant, final plant population, 100-grain weight and grain yield. The cowpea cultivars sown in December produced the lowest numbers of pods per plant and grains per pod, resulting in the lowest grain yields. The cultivar BRS-Tumucumaque had the highest grain yield in the January sowing. The highest grain yields were found in the February sowing, especially when the cultivars BRS-Itaim (3,439 kg ha-1), BRS-Novaera (3,435 kg ha-1), BRS-Guariba (3,168 kg ha-1) and BRS-Potengi (3,107 kg ha-1) was used.

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