scholarly journals Variations of Macro- and Microelements in Yellow-Fleshed Cassava (Manihot esculenta Crantz) Genotypes as a Function of Storage Root Portion, Harvesting Time, and Sampling Method

2020 ◽  
Vol 10 (16) ◽  
pp. 5396
Author(s):  
Emmanuel Oladeji Alamu ◽  
Busie Maziya-Dixon ◽  
Consent Sibeso ◽  
Elizabeth Parkes ◽  
Alfred Gilbert Dixon

The correct estimation of the mineral content of cassava (Manihot esculenta) genotypes is vital from a nutritional point of view. This study evaluated the effects of the storage root section, maturity, and sampling method on the macro- and microelements in yellow-fleshed cassava root genotypes. In total, 44 genotypes were grown in replicated field trials of 2 sets (set 25 and set 19) and were harvested at 9 and 12 months after planting. Two sampling methods, sampling with a cork borer (A = proximal, B = middle, C = distal or method 1) and sampling without a cork borer (L = Longitudinal or method 2), were used. The minerals of the samples from the two methods were determined using inductively coupled optical emission spectrometry (ICP-OES). K and Mn were the most abundant minerals, and Na, Mo, and Co were the least abundant. Genotype, method, and maturity had a strong influence on mineral concentrations. Harvesting time affected the concentration level of some macro- and microelements in cassava roots. Additionally, Ca, Mg, K, P, Mn, Cu, Ni, and Zn contents were significantly (p < 0.05) higher in the proximal and middle portions for method 1. K and P and Mn and B were positively correlated, but K and Na and Fe and Ni were negatively associated.

Jurnal MIPA ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 227
Author(s):  
Ifanayanti Ali ◽  
Sendy B. Rondonuwu ◽  
Farha N. J. Dapas

Merkuri merupakan salah satu logam berat berbahaya diantara logam berat lainya seperti Timbal (Pb), Arsenik (As), Kadmium (Cd), Kromium (Cr) dan Nikel (Ni). Merkuri memiliki sifat beracun yang sangat kuat diketahui dapat terakumulasi dan tetap berada di dalam tubuh mahluk hidup dalam jangka waktu yang lama sebagai racun yang terakumukasi. Penelitian ini di lakukan untuk mengetahui kandungan merkuri pada tanah dan Umbi tanaman ubi kayu (Manihot esculenta Crantz) di daerah pertambangan Desa Soyowan Minahasa Tenggara. Dengan menggunakan Metode Purposive Random Sampling. Pengambilan sampel terbagi atas tiga stasiun dengan tiga kali ulangan. Hasil penelitian menunjukkan bahwa kandungan merkuri dalam tanah tidak terdeteksi oleh alat AAS (Atomic ansorption Spectrometry) karena kandungan merkuri pada tanah terlampau kecil, sedangkan pada sampel umbi tanaman ubi kayu memiliki kandungan merkuri yaitu 0,1414 ppm. Konsentrasi merkuri (Hg) melebihi ambang batas sehingga tanaman pada Stasiun II tidak layak lagi untuk dikonsumsiMercury is one of the heavy metals containing other heavy metals such as Lead (Pb), Arsenic (As), Cadmium (Cd), Chromium (Cr) and Nickel (Ni). Mercury has very strong and accountable characteristics and remains in living things for a long time as an educated conversation. Manihot esculenta Crantz in the Mining Area of Soyowan Village, Southeast Minahasa. By using the Purposive Random Sampling method, sampling was divided into three stations with three replications. The results showed that the mercury content in the soil could not be found by the AAS tool because the mercury content in the soil was too small, whereas the tuber samples of cassava plants had a mercury content of 0.1414 ppm. excessive mercury (Hg)  concentration threshold so plants at Station II are no longer suitable for consumption


2003 ◽  
Vol 15 (3) ◽  
pp. 167-170 ◽  
Author(s):  
Cláudia Regina Batista de Souza ◽  
Elionor Rita Pereira de Almeida ◽  
Luiz Joaquim Castelo Branco Carvalho ◽  
Eugen Silvano Gander

Transcription factors play important roles in several physiological processes. In recent years many transcription factors have been isolated from plants and they are emerging as powerful tools in the manipulation of plant traits. In this work we initiated studies in order to isolate transcription factors from cassava (Manihot esculenta Crantz), an important tropical and subtropical crop. Our results show three kinds of proteins expressed differentially in cassava storage root and immunologically related to the opaque-2 transcription factor from maize. Southwestern experiments showed two proteins capable of interacting in vitro with the DNA sequence of the be2S1 gene from the Brazil nut tree.


2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Wenzhi Zhou ◽  
Shutao He ◽  
Maliwan Naconsie ◽  
Qiuxiang Ma ◽  
Samuel C. Zeeman ◽  
...  

2019 ◽  
Vol 34 (3) ◽  
pp. 323-330
Author(s):  
Alberto Kazushi Nagaoka ◽  
Fernando César Bauer ◽  
Guinther Hugo Grudtner ◽  
Aldir Carpes Marques Filho ◽  
Nuno de Campos Filho

AVALIAÇÃO DO DESEMPENHO DE UMA PLANTADORA DE MANDIOCA SOB SISTEMA DE PLANTIO DIRETO TRACIONADA POR TRATOR DE RABIÇAS   ALBERTO KASUSHI NAGAOKA1, FERNANDO CÉSAR BAUER2, GUINTHER HUGO GRUDTNER3, ALDIR CARPES MARQUES FILHO4, NUNO CAMPOS FILHO5   1 Departamento de Engenharia Rural, Centro de Ciências Agrárias, UFSC, (Rua Admar Gonzaga, 1346 –Itacorubi, Florianópolis, 88034-000), [email protected] 2 Departamento de Engenharia Rural, Centro de Ciências Agrárias, UFSC, (Rua Admar Gonzaga, 1346 –Itacorubi, Florianópolis, 88034-000), [email protected] 3 Departamento de Engenharia Rural, Centro de Ciências Agrárias, UFSC, (Rua Admar Gonzaga, 1346 –Itacorubi, Florianópolis-SC, 88034-000), [email protected] 4  Departamento de Engenharia Rural, Universidade Estadual Paulista, UNESP, (Rua José Barbosa de Barros, 1780, Jd. Paraíso- Botucatu-SP, 18610-034), [email protected] 5 Departamento de Engenharia Rural, Centro de Ciências Agrárias, UFSC, (Rua Admar Gonzaga, 1346 –Itacorubi, Florianópolis, 88034-000), [email protected]   RESUMO: A produção de mandioca possui grande importância nas regiões onde predomina a agricultura familiar em pequenas propriedades rurais, assim a mecanização do cultivo pode promover o incremento de produtividade e otimizar o rendimento operacional. O objetivo deste trabalho foi avaliar o desempenho de uma plantadora de mandioca em sistema de plantio direto, tracionada por um trator de rabiças, através de dois ensaios de campo. No primeiro ensaio a plantadora foi avaliada em função de três velocidades distintas, obtendo dados de potência exigida pelo conjunto trator-plantadora e por cada parte constituinte da máquina. No segundo ensaio, avaliou-se a plantadora sob duas velocidades, dois modelos de discos de corte, dois modelos de rodas compactadoras e a potência exigida para tracioná-la, além da distribuição longitudinal das plantas de mandioca. Os resultados do primeiro ensaio mostraram que a marcha de menor velocidade exigiu menor potência do trator. Já os resultados do segundo ensaio, demonstraram que a potência exigida do trator variou em função do tipo de disco de corte e de roda compactadora da plantadora. Para a avaliação da distribuição longitudinal, a plantadora avaliada não apresentou diferenças estatísticas na percentagem de espaçamentos aceitáveis, falhos e duplos entre as linhas de plantio.   Palavras-chave: manihot esculenta crantz, mecanização, máquina.   EVALUATION OF PERFORMANCE OF CASSAVA IN NO TILLAGE, WITH TRACTOR OF HANDLEBARS   ABSTRACT: Cassava production is one of the greatest important in regions where family agriculture and small farms are predominant. The aim of this research was to evaluate the performance of a no-till cassava planter traced by a tractor of handlebar, through two field trials. In the first trial the planter was evaluated according to three speeds, obtaining data of power required by the tractor-planter assembly and each constituent part of the planter. In the second test, the planter was evaluated under two speeds, two models of cutting discs, two models of compacting wheels and the power required drawing it, besides the longitudinal distribution of cassava. The results of the first test showed that lower speed gear required less tractor power. The results of the second test, however, showed that the required power of the tractor varied according to the type of cutting disc and the compactor wheel of the planter. For the evaluation of longitudinal distribution, the planter evaluated did not present statistical differences in the percentage of acceptable, faulty and double spacing between the planting lines.   Keywords: manihot esculenta crantz, mechanization, machine.


Crop Science ◽  
2008 ◽  
Vol 48 (1) ◽  
pp. 49-58 ◽  
Author(s):  
Mark E. Halsey ◽  
Kenneth M. Olsen ◽  
Nigel J. Taylor ◽  
Paul Chavarriaga-Aguirre

2020 ◽  
Vol 7 (1) ◽  
pp. 53-61
Author(s):  
Emmy Harso Kardhinata ◽  
Edison Purba ◽  
Dwi Suryanto ◽  
Herla Rusmarilin

The study of identification and inventory of cassava accessions was done from August to September 2014 in four districts based on their potential as a center for cassava cultivation, namely Simalungun, Serdang Bedagai, Deli Serdang, Langkat Regency representing the lowlands and Simalungun and Karo Regency representing the highlands. Each district was selected 3 subdistricts and each subdistrict was surveyed 3 villages randomly through the accidental sampling method. Guidance on identifying morphological characters was used by reference from Fukuda, et al. (2010) by giving a score for each character observed. The results of the study obtained 8 genotypes with their respective codes and local names; 1) Sawit (G1), 2) Lampung (G2), 3) Merah (G3), 4) Adira-1 (G4), 5) Kalimantan (G5), 6) Malaysia (G6), 7) Roti (G7) and 8) Klanting (G8). The most common genotype found in the location were Malaysia and Adira-1, while the rarest was Merah. The yield potential at the age of 10 months were Sawit (26,9–30,1 tons/ha), Lampung (29,6–52,6 tons/ha), Merah (54–61,6tons/ha), Adira-1 (34,8–55,0 tons/ha),  Kalimantan (15,8–64,2 tons/ha), Malaysia (32,9–64,3 tons/ha), , Roti (24,7–55,5 tons/ha), and Klanting (327,4–49,8 tons/ha).


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