scholarly journals A model of dry matter distribution in cassava (Manihot esculenta Crantz).

1978 ◽  
Vol 26 (3) ◽  
pp. 267-277 ◽  
Author(s):  
B.W.J. Boerboom
Keyword(s):  
Environmental Conditions ◽  
Manihot Esculenta ◽  
Harvest Index ◽  
Dry Matter ◽  
Growth Cycle ◽  
Matter Distribution ◽  
Manihot Esculenta Crantz ◽  
Dry Matter Distribution ◽  
Cassava Plant ◽  
Tuber Production

Results of an experiment in Trinidad were analysed and data obtained from literature were recalculated to determine which factors control the DM distribution in the cassava plant. Under given conditions for long periods, possibly for the storage life of cassava, the distribution of DM over tubers and shoot proved to be constant. Based on this finding, a model was developed and 2 parameters were introduced: ESRP, efficiency of the plant at producing tubers; ISS, initial plant wt. at which tuber production starts. The model was used to visualize genetic differences and the effect of environmental conditions on DM distribution. The relation between harvest index and ESRP was discussed. It is recommended that ESRP is used instead of harvest index as a selection trait. Selection material on ESRP can be screened rather early in the growth cycle as tuber wt. is linearly related to plant wt. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Starch and flour extraction and nutrient composition of tuber in seven cassava accessions

2013 ◽  
Vol 10 (2) ◽  
pp. 217-222 ◽  
Author(s):  
MSA Fakir ◽  
M Jannat ◽  
MG Mostafa ◽  
H Seal
Keyword(s):  
Hydrogen Cyanide ◽  
Manihot Esculenta ◽  
Crude Protein ◽  
Dry Matter ◽  
Raw Materials ◽  
Starch Content ◽  
Staple Food ◽  
Manihot Esculenta Crantz ◽  
Crude Fiber Content ◽  
Cassava Plant

Cassava (Manihot esculenta Crantz) roots (tubers) are used as staple food. Starch extracted from tubers is widely utilized as raw materials in industries. Dry matter (DM) content, starch and flour extraction and proximate composition were investigated in seven cassava accessions (Coc-A1, Kh-A2, Cow-A3, Sa-A4, Me-A5, Va-A6 and Sy-A8.) in 2010- 2011. Leaf DM varied from 20.51% in Me-A5 to 29.01% in Sy-A8; that of stem from 27.24% in Va-A6 to 32.10% (average of Sy-A8, Me-A5 and Sa-A4); and that of tuber from 37.30% in Kh-A2 to 45.26% in Sy-A8. Starch was extracted by blending chopped tuber followed by decantation. Tubers were sliced, sun dried and milled into flour. Tuber starch content (fresh wt. basis) varied between 15.04% in Sy-A8 and 24.97% (average of Coc-A1 and Me-A5); that of peel from 4.54% in Va-A6 to 5.85% in Coc-A1. Crude protein varied from 1.80% (average of Kh-A2, Cow-A3 and Sy-A8) to 4.53% in Va-A6. Crude fiber content varied from 1.95% (average of Sa-A4 and Coc-A1) to 4.27% in Cow-A3. Cyanogens present in cassava plant escape as hydrogen cyanide (HCN) during harvesting and processing. Variation for HCN existed and it was 140.95 mg/kg fresh tuber (average of Sy-A8 and Coc-A1) to 546.0 mg/kg fresh tuber in Va-A6. There was no detectable HCN in the extracted flour and starch. It may be concluded that genetic variation for DM, starch, protein and HCN existed in seven cassava accessions, and Coc-A1 may be a better one due to its lower HCN, higher DM and starch content. DOI: http://dx.doi.org/10.3329/jbau.v10i2.14698 J. Bangladesh Agril. Univ. 10(2): 217-222, 2012

scholarly journals Effect of harvest period on foliage production and dry matter distribution in five cassava cultivars during the second plant cycle

2006 ◽  
Vol 49 (6) ◽  
pp. 1007-1018 ◽  
Author(s):  
Edvaldo Sagrilo ◽  
Pedro Soares Vidigal Filho ◽  
Manoel Genildo Pequeno ◽  
Maria Celeste Gonçalves Vidigal ◽  
Carlos Alberto Scapim ◽  
...  
Keyword(s):  
Dry Matter ◽  
Rest Period ◽  
Matter Content ◽  
Plant Production ◽  
Dry Matter Content ◽  
Matter Distribution ◽  
Storage Roots ◽  
Leaf Production ◽  
Dry Matter Distribution ◽  
Cassava Plant

The objective of this work was to study the leaf production pattern and dry matter distribution in cassava during the second plant cycle. The completely randomized experimental design with four replications was used, with five cultivars in the main plots and ten harvest times in the sub-plots. Foliage production was affected by plant age, being higher in hot periods. Leaf blades and petioles dry matter content presented a linear increase due to a progressive decrease in the amount of young leaves and ontogenetic factors. The stems provided, temporarily, carbohydrates to the plant re-growth, delaying the availability and use of storage roots dry matter. The dry matter content in the storage roots was lower during the vegetative and higher during rest period. The storage roots diameter increased considerably when the amount of leaves was higher, indicating the importance of leaf area in the cassava plant production.

scholarly journals The Productivity of Cassava (Manihot esculenta Crantz) in Kagoshima, Japan, Which Belongs to the Temperate Zone

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2021
Author(s):  
Shin Yabuta ◽  
Tamami Fukuta ◽  
Shotaro Tamaru ◽  
Keita Goto ◽  
Yoshihiro Nakao ◽  
...  
Keyword(s):  
Exchange Rate ◽  
Gas Exchange ◽  
Dry Matter ◽  
Ground Surface ◽  
Temperate Zone ◽  
Light Transmittance ◽  
Matter Distribution ◽  
Manihot Esculenta Crantz ◽  
Dry Matter Distribution ◽  
Gas Exchange Rate

The cultivation period of cassava in Kagoshima, Japan, which belongs to the temperate zone, is limited by the low temperature in winter. To maximize productivity under this limited period, investigations were conducted on the gas exchange rate and production structure relating to light utilization in a plant community of cassava grown under different nitrogen fertilization conditions. Fertilization either at planting or three months after planting significantly increased stomatal conductance in the upper canopy and root dry weight compared to the control. In addition, the dry matter distribution to stem and root dry matter rate of initial fertilization treatment were significantly higher, and the dry matter distribution to root of the latter fertilization treatment tended to be higher than that of the control. However, light transmittance at 80 cm below the top of the canopy was almost the same as that at the ground surface, which was a common tendency among the treatments. In conclusion, it was revealed that the effects of fertilization on yield were mainly the increase in the gas exchange rate of individual leaves and the change of dry matter distribution rather than an improvement in light transmittance.

scholarly journals Effect of mosaic virus diseases on dry matter content and starch yield of five cassava (Manihot esculenta Crantz) accessions in Ghana

2013 ◽  
Vol 12 (27) ◽  
pp. 4310-4316 ◽  
Author(s):  
Elegba Wilfred ◽  
S Appiah rew ◽  
Azu Elaine ◽  
Afful Nusrat ◽  
K S Agbemavor Wisdom ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Manihot Esculenta ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Content ◽  
Virus Diseases ◽  
Manihot Esculenta Crantz ◽  
Starch Yield

Plasticity in growth and patterns of dry matter distribution of two genotypes of Trifolium repens grown in different environments of neighbours

1983 ◽  
Vol 61 (8) ◽  
pp. 2186-2194 ◽  
Author(s):  
Roy Turkington
Keyword(s):  
Trifolium Repens ◽  
Dry Matter ◽  
Poa Pratensis ◽  
Dactylis Glomerata ◽  
Hostile Environment ◽  
Matter Distribution ◽  
Dry Matter Distribution ◽  
Trade Off ◽  
Mobile Plant ◽  
Trifolium Repens L

Replicates of two genotypes of Trifolium repens L., collected from a Poa pratensis dominated sward and a Dactylis glomerata dominated sward, respectively, were grown in swards composed of various proportions of P. pratensis and D. glomerata. These swards represented a range of environments of neighbours; an increasing proportion of P. pratensis was considered as an increasingly alien environment for individuals of T. repens collected from the D. glomerata dominated site, and vice-versa for the individuals from the P. pratensis dominated site. The individuals of T. repens were harvested on five occasions over a period of 27 months. Both genotypes responded to increasingly alien environments by producing more inflorescences and by distributing proportionately more dry matter to inflorescence production. Some evidence is also presented which suggests that allocation to stolons and inflorescences are alternatives and the balance of the trade off is dependent on the advantages of possibly producing new, better adapted offspring from seed, against the chances of a wandering stolon encountering a less hostile environment. Results are discussed in the context of environmental alienness, a major source of which is the different relative proportions of neighbours. The various genotypes of organisms which a relatively mobile plant species encounters are a major source of this environmental, or biotic, alienness.

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