scholarly journals Adapting sweetpotato production to changing climate in Mozambique

2018 ◽  
Vol 3 (1) ◽  
pp. 122-130 ◽  
Author(s):  
Godwill S. Makunde ◽  
Maria I. Andrade ◽  
Joana Menomussanga ◽  
Wolfgang Grüneberg
Keyword(s):  
Growth Habit ◽  
Smallholder Farmers ◽  
Block Design ◽  
Research Station ◽  
Changing Climate ◽  
Planting Material ◽  
Sprout Length ◽  
Sprouting Ability ◽  
Dry Spells ◽  
Randomized Complete Block Design

Abstract Vines are the major source of planting material in sweetpotato. Extended dry spells hinder conservation of vines and in turn affect the availability of planting material at the onset of rains in southern Africa. In some cases, improved sweetpotato germplasm has been lost by smallholder farmers in Mozambique due to prolonged dry spells. Small to medium roots provide an opportunity to conserve germplasm and get planting material at the beginning of the rainy season. The objectives of the study were to (i) measure sprouting ability of diverse germplasm of sweetpotato - farmer varieties, improved clones and released varieties and (ii) estimate their ability to provide planting material for the next crop in southern Mozambique. Trials with 29 genotypes were established in a randomized complete block design with two replications at Umbeluzi Research Station and Nwalate Farm in 2015, 2016 and 2017. At harvest, 14 small to medium roots were selected and stored in small plastic dishes filled with dry sand at Nwalate Farm. After four months in storage, 10 similar roots were taken and planted in 1 m row plots arranged in a randomized complete block design with two replications. The trials were irrigated to initiate sprouting and support plant growth during the first four weeks. Data collected were analysed using SAS 1996. All the tested genotypes sprouted after sowing. The number of sprouts per root were significantly affected by the genotype, location and genotype x location x year interactions. Caelan had the most sprouts per root. Sprout length measured at six weeks after sprouting was also significantly affected by genotype, location, year and genotype x location x year interactions. Caelan had vines each long enough to provide 10 cuttings of 10 cm length for rapid multiplication. The number of cuttings depended on the growth habit of the variety. Irene, a popular variety in Mozambique, is erect and bushy and could only provide four cuttings over the same period. Growth habit especially under a changing climate should be considered in breeding programs as an option of facilitating a sustainable and easy seed system.

scholarly journals Survival of sweetpotato (Ipomoea batatas [L] Lam) vines in cultivars subjected to long dry spells after the growing season in Mozambique

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Maria I. Andrade ◽  
Godwill S. Makunde ◽  
Jose Ricardo ◽  
Joana Menomussanga ◽  
Abilio Alvaro ◽  
...  
Keyword(s):  
Ipomoea Batatas ◽  
Block Design ◽  
Growing Season ◽  
Sub Saharan Africa ◽  
Planting Material ◽  
Dry Spells ◽  
Dry Spell ◽  
Randomized Complete Block Design ◽  
Sub Saharan ◽  
Important Objective

AbstractOptimisation of sweetpotato production potential is not realized in sub-Saharan Africa where dry spells are common after the growing season. Lack of seed cultivars at the beginning of the rainy season is the challenge and identifying those cultivars with the ability to survive a 4 to 7-month dry spell is an important objective in these regions. To this end, the purpose of the present study was to estimate survival of vines of different cultivars under drought stress. Three harvesting times set as 5, 9 and 11 months after planting were established at Umbeluzi, Nwallate and Gurue in 2015. For each harvesting time, 37 clones were evaluated in a randomized complete block design with two replications. Data collected on yield, vine length and number of sprouts were analysed using SAS 1996. Resisto had long stems but no vines after 9 months at any of the sites. The ability of some clones to reach 9 months and 11 months with few vines at Umbeluzi and Nwallate offer sources of planting material for the subsequent season. Sprouting had broad sense heritability above 50%. Sprouting is known to be an important aspect of cultivar survival. While we show that vine length and thickness could be traits responsible for sweet potato drought tolerance

Growth and Branching Responses of Portulaca grandiflora to Foliar Applications of Chemical Growth Regulators

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 447c-447
Author(s):  
T.J. Banko ◽  
M.A. Stefani
Keyword(s):  
Growth Regulators ◽  
Growth Habit ◽  
Stem Elongation ◽  
Block Design ◽  
Shoot Elongation ◽  
Main Shoot ◽  
Randomized Complete Block Design ◽  
Portulaca Grandiflora ◽  
Prostrate Growth ◽  
Secondary Shoot

During container production of portulaca, growth of long, prostrate, sparsely branched stems makes handling of plants difficult, and reduces their commercial appeal. Growers prefer to minimize shoot elongation while increasing branching to provide a full, compact plant. The objectives of this study were to evaluate growth regulators for promotion of branching and inhibition of stem elongation. Container-grown plants ≈21 cm in diameter were treated with sprays of ProShear (benzylaminopurine) at 62.4, 125, and 250 ppm; Promalin (benzyaminopurine + gibberellins 4+7) at 125, 250, and 500 ppm; Atrimmec (dikegulac) at 250, 500, and 750 ppm; and Florel (ethephon) at 250, 500, and 750 ppm. These treatments were compared with untreated controls in a randomized complete-block design. Main shoot lengths were measured at 16, 31, and 51 days after treatment (DAT). Numbers of new shoot breaks were counted 16 DAT. The growth habit, that is, tendency to grow upright or prostrate, was also evaluated 16 DAT. The most-effective material for retarding primary shoot elongation and for stimulating secondary shoot development was ProShear. At 16 DAT, 250 ppm ProShear reduced shoot elongation by 25% compared to control plants. This treatment also increased the number of secondary shoot breaks by 143%. Promalin increased the number of new shoot breaks, but it also increased the lengths of all shoots. High rates of Florel and Promalin caused shoots to grow predominantly upright rather then prostrate. ProShear, however, caused more prostrate growth as rate increased.

scholarly journals Seed Yam Production Using High-Quality Minitubers Derived from Plants Established with Vine Cuttings

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 978
Author(s):  
Beatrice Aighewi ◽  
Norbert Maroya ◽  
Lava Kumar ◽  
Morufat Balogun ◽  
Daniel Aihebhoria ◽  
...  
Keyword(s):  
Block Design ◽  
Research Station ◽  
International Institute ◽  
Tropical Agriculture ◽  
Single Node ◽  
Cropping Season ◽  
Randomized Complete Block Design ◽  
The World ◽  
Cropping Seasons ◽  
Set Up

Yam (Dioscorea spp.) is a valuable food security crop in West Africa, where 92% of the world production occurs. The availability of quality seed tubers for increased productivity is a major challenge. In this study, minitubers weighing 1, 3, and 5 g produced from virus-free single-node vine cuttings of two improved yam varieties (Asiedu and Kpamyo) growing in an aeroponics system were assessed for suitability in seed production at a population of 100,000 plants ha−1. A 3 × 2 factorial experiment with randomized complete block design and three replications was set up during the cropping seasons of 2017 to 2019 at the International Institute of Tropical Agriculture Research Station in Kubwa, Abuja, Nigeria. Results showed field establishments of 87%–97.8%. Yields differed with minituber size, variety, and cropping season; the highest was 31.2 t ha−1 in 2019 and the lowest, 10 t ha−1 in 2018 from 5 and 1 g Kpamyo minitubers, respectively. The estimated number of tubers produced per hectare by 1, 3, and 5 g minitubers was 101,296, 112,592, and 130,555, with mean weights per stand of 159.2, 187.3, and 249.4 g, respectively. We recommend using less than 6 g minitubers for seed yam production due to their high multiplication rates.

scholarly journals Combining ability and heterotic value of ten lines maize genotypes tolerant to tidal-swamp soil stress

2021 ◽  
Vol 911 (1) ◽  
pp. 012024
Author(s):  
Suwarti ◽  
Munif Ghulamahdi ◽  
Muhammad Azrai ◽  
Didy Sopandi ◽  
Trikoesoemaningtyas ◽  
...  
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Parental Line ◽  
Research Station ◽  
Acid Sulphate Soils ◽  
Tidal Swamp ◽  
Maize Genotypes ◽  
Randomized Complete Block Design ◽  
Target Environment ◽  
Half Diallel

Abstract Development of maize hybrid for tidal swampland was initiated by selecting and combinate some superior line genotypes that tolerate to the restrictions in target environment. This study aimed was to evaluate the capability of ten maize lines result of selection on tidal swamp acid sulphate soils to obtain GCU, GCA, and heterosis values based on parental yield averages. The experiment has consisted of ten fine line genotypes which have selected in 2019 at the tidal swamp. Each parent was crossed in half-diallel combination, resulting in 46 entries, including the inbred parents. The entries were planted in a randomized complete block design with three replications. The research was conducted on Bajeng Research Station Experiment 5°18’S and 119°30’E from September 2020 to January 2021. The result shows that GCA ability and SCA ability was significant to yield in the form of grain (15% moisture content), the number of ear per plot, ten ear weight, ten corncob weight, ear harvested weight, 1000 seeds weight, plant height, ear length and the number of seed per ear. Grain yield of W6xW9 crosses obtains the highest value of 9.36 tha−1, non-significantly different to hybrid check P35 (9.35 tha-1). The highest GCA value in the grain yield character was obtained on W9 parental line (0.64**). The highest SCA was obtained on the crossing of W7 x W8 (2.61). The highest heterosis value was revealed in W5 x W10 hybrid (4.80). However, W7 x W8 crossing heterosis value was 2.34, indicate that a high SCA effect did not usually generate high heterosis. To perform high heterosis value, W10 was good as female parental.

scholarly journals EFFECT OF HARDWOOD BARK MULCH ON THE WINTER SURVIVAL OF EIGHT CULTIVARS OF GARDEN CHRYSANTHEMUMS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1097c-1097
Author(s):  
William F. Hayslett ◽  
P. R. Thangudu ◽  
Sabrina Shaw
Keyword(s):  
Field Study ◽  
Block Design ◽  
Winter Survival ◽  
Research Station ◽  
Percent Survival ◽  
Flowering Season ◽  
Significant Difference ◽  
Randomized Complete Block Design ◽  
Cold Hardy

A field study was conducted at Tennessee State University's research station to evaluate the effect of hardwood bark mulch on the winter survival of garden mums. A randomized complete block design was used. Cultivars used were adorn, encore, grandchild, jackpot, legend, minnautumn, minnwhite and triump. At the end of the flowering season the tops were removed leaving a four inch stubble in the mulch. The number of mum plants that resumed growth the following spring were counted for each cultivar. There was a difference in the winter survival of the different cultivars as well as a significant difference in the mulch treated and the control. Grandchild and jackpot were most cold hardy followed by encore, minnwhite, minnautumn, triump, legend, and adorn. Grandchild and jackpot with four inches of hardwood bark mulch had an 88 percent survival while the control had a 44 percent survival. Adorn. had a 51 percent survival with four inches of mulch and a 20 percent survival in the control. This data shows that hardwood bark mulch holds a great potential for providing excellent winter protection for garden mums.

scholarly journals Physical Bean Quality of Arabica Coffee (Coffea Arabica) Cultivated at High and Medium Altitude

2016 ◽  
Vol 32 (3) ◽  
pp. 151-161
Author(s):  
Dwi Nugroho ◽  
Panjisakti Basunanda ◽  
Suryadi Mw
Keyword(s):  
Coffea Arabica ◽  
Block Design ◽  
Research Station ◽  
Physical Quality ◽  
Arabica Coffee ◽  
Randomized Complete Block Design ◽  
Before And After ◽  
Coffee Cultivation ◽  
Cup Quality

Reducing productivity, outbreak of insects and diseases, and decreasingin physical and cup quality are major problems for Arabica coffee cultivation inmedium altitude. The aim of this study was to investigate the effect of altitude onphysical quality in eight genotypes of Arabica coffee. This research was conductedat two locations i.e. Andungsari Research Station-Bondowoso (1250 m asl. ashigh altitude) and Kalibendo Estate-Banyuwangi (700 m asl. as medium altitude).Randomized complete block design was used with three replications. Collecteddata consisted of outturn, weight of 100 beans, shape bean normality, apparentswelling, bulk density before and after roasting. Combined analysis on the physicalquality traits of green bean showed genotype x altitude interactions on weight of100 beans, percentage of normal beans and percentage of empty bean. Altitudesignificantly influenced coffee outturn. Decreasing in altitude from 1.250 m asl.to 700 m asl. caused declining in the outturn as much 32.9%. BP 700A, K 29, K34, K 79, and K 99 were genotypes that stable to produce normal bean and emptybeans at high and medium altidute, while K 8, K 130, and SIG were genotypeswith high normal beans at high altitude but not stable. Genotype x altitude interactiondid not occur for physical quality of other variables of outturn, bulk densitybefore and after roasting, apparent swelling, percentage of round beans,percentage of elephant beans, and percentage of triage beans. Altitude showedsignificant effect on all of physical quality of bean variables.

scholarly journals EFFECT ORGANIC NUTRIENT HUMIC AND COMPOUND CHEMICAL FERTILIZER IN LEAVES CONTENT FROM ELEMENTS AND TOTAL YIELD CUCUMBER

2017 ◽  
Vol 48 (3) ◽  
Author(s):  
AL-AZZAWI & AL-IBADI
Keyword(s):  
Organic Material ◽  
Block Design ◽  
Total Yield ◽  
Chemical Fertilizer ◽  
Research Station ◽  
Total Production ◽  
College Of Agriculture ◽  
Organic Nutrient ◽  
Randomized Complete Block Design ◽  
Four Levels

This experiment was carried out at the Scientific Research Station of the College of Agriculture - University of Baghdad (Al-Jadiriyah), Spring and Autumn seasons 2015, using to Cucumber hybrid Gazeer, to study effect of adding organic material the vegetative growth of Cucumber. The experiment was conducted as factorial experiment (4x3) with in randomized complete Block design, with three replicates, First factor includes four levels of chemical fertilizer (0, 100%, 50% and 25%) of the recommended doses of fertilizers, The second factor was three levels of organic nutrient humic (0, 5kg ha-1 and 10kg ha-1). The results showed superiority of the treatment of  interaction C1H2 (NPK 100%+10 kg.ha-1 nutrient organic) in leaves content (2.63 and 2.70)%, Phosphorus (0.49 and 0.53)%, Potassium (3.69 and 3.50)%, Magnesium (0.81 and 0.77)%, Iron (192.84 and 187.71) mg kg-1 and Zinc (51.97 and 52.67) mg kg-1, also the same treatment was superiority in total production (42.51 and 30.50) tons for two seasons, spring and autumn respectively.

scholarly journals Evaluation of plantain genotypes for yield and other characters

2018 ◽  
Vol 43 (1) ◽  
pp. 71-80
Author(s):  
N Ara ◽  
M Moniruzzaman ◽  
R Khatoon ◽  
M Moniruzzaman
Keyword(s):  
Agricultural Research ◽  
Block Design ◽  
Fruit Size ◽  
Productivity Index ◽  
Maturity Stage ◽  
Research Station ◽  
Yield Attributes ◽  
Yield And Quality ◽  
Randomized Complete Block Design ◽  
Better Than

An experiment was carried out at the Regional Agricultural Research Station, BARI, Ishurdi, Pabna during 2013-15, with eleven genotypes of plantain to evaluate their performances for yield attributes, yield and quality characters. The genotypes included in this investigation were MP001, MP002, MP003, MP006, MP007, MP015, MP018, MP024, MP025, ISD002 and BARI Kola-2 as check. The experiment was laid out in randomized complete block design with three replications. The genotype MP002 produced the maximum number of fingers/bunch (105.67) closely followed by BARI Kola-2 (103.00) and MP015 (101.00). Both the genotypes MP024 and MP025 showed the highest fruit length (21.70 cm), but ISD002 gave the maximum fruit girth (16.78 cm), which was statistically similar with that of MP003 (16.30 cm) and MP024 (16.33 cm). The highest yield and the maximum number of hands were produced by the genotype MP024 (47.81 t/ha and (8.33/bunch) followed by MP015 (36.70 t/ha and 6.33/bunch). Fingers of the genotypes required boiling time in the range of 20.00 min (MP001) to 15.00 min (BARI Kola-2). Flesh of all genotypes possesses pleasant aroma except MP002, MP003 and ISD002. Among the eleven genotypes MP001, MP006, MP007, MP008, MP015 and MP024 were found better when cooked as smashed. The genotype ISD002 took the maximum time (467.33 days) to reach the edible maturity stage of fruits whereas MP024 required the minimum (339.00 days). The genotypes MP015 and MP024 performed better than BARI Kola-2 in respect of bunch weight, fruit size, productivity index, yield, sucker production and qualitative characters.Bangladesh J. Agril. Res. 43(1): 71-80, March 2018

scholarly journals Performance of Bhote type garlic genotypes under Karnali region of Nepal

2018 ◽  
Vol 18 ◽  
pp. 115-119
Author(s):  
Raj Kumar Giri ◽  
Basant Chalise ◽  
Pragati Babu Paneru ◽  
Giri Dari Subedi ◽  
Bishwash Poudel ◽  
...  
Keyword(s):  
Block Design ◽  
Research Station ◽  
Yield Parameters ◽  
Yield Trial ◽  
Randomized Complete Block Design ◽  
Minimal Work ◽  
Almost All ◽  
Horticultural Research ◽  
Bulb Yield

Advance Yield Trial on different Bhote type garlic genotypes collected from different districts of Nepal was carried out at Horticultural Research Station, Rajikot, Jumla for two consecutive years 2013/14 and 2014/15 to evaluate garlic genotypes suitable for the Karnali region of Nepal. Minimal work has been done in past on garlic, almost all of which centered at terai and mid hills that's why this study was carried out to select suitable bhote type garlic genotypes for high hill. Eleven different garlic genotypes were tested on Randomized Complete Block Design (RCBD) with three replication. Tested genotypes differed significantly for vegetative as well as yield parameters. During 2013, the highest bulb yield (47.41 t/ha) was recorded from ARM 01 followed by Mugu Local (47.01 t/ha), ARM 04 (46.98 t/ha), Kathmandu Local (45.41 t/ha), Chinese (37.91 t/ha) and the lowest from ARM 08 (20.1 t/ha). Similarly, during 2014/15, the highest bulb yield was observed from ARM 01 (50.32 t/ha) followed by Mugu Local (49.91 t/ha), Kathmandu Local (41.62 t/ha), Chinese (29.60 t/ha) and the lowest from ARM 05 (12.51 t/ha). Based on the average result of both years, ARM 01, Mugu Local, Kathmandu Local, ARM 04 and Chinese showed the better productivity ranged from 29.6 t/ha to 50.32 t/ha which are the promising garlic genotypes for the Karnali region of Nepal.

scholarly journals Performance evaluation of early maize genotypes in far western hills of Nepal

2015 ◽  
Vol 1 (1) ◽  
pp. 106-111
Author(s):  
Hari Kumar Prasai ◽  
Ujjawal Kumar Singh Kushwaha ◽  
Bishnu Prasad Joshi ◽  
Jiban Shrestha
Keyword(s):  
Performance Evaluation ◽  
Statistical Analysis ◽  
Research And Development ◽  
Agricultural Research ◽  
Block Design ◽  
Initial Evaluation ◽  
Research Station ◽  
Maize Genotypes ◽  
Randomized Complete Block Design ◽  
Evaluation Trial

Initial evaluation trial of maize (early) genotypes was carried out at Regional Agricultural Research Station, Doti, Nepal in 2013 and 2014. Total fourteen and fifteen genotypes of early maize were included in initial evaluation experiment of the year 2013 and 2014 respectively. The experiment was laid out in randomized complete block design (RCBD) with three replications in each year. Out of the tested genotypes, SO3TEY/LN, ZM 423 and SO3TEY-FM (ER) identified as promising from statistical analysis over year. All the tested characters were found statistically significant. Similarly, the coordinated varietal trial of maize (early) was also carried out in the same station at 2013 and 2014. Total fourteen genotypes in 2013 and fifteen genotypes in 2015 of maize (early) were included in the experiment. The RCB design was applied and the experiment was replicated three times in every year. ZM 627 and ZM 621/Pool -15 genotypes identified as superior next to Arun-2 from the analysis of two year data. All the tested traits were found statistically significant in over year analysis.Journal of Maize Research and Development (2015) 1(1):106-111DOI: http://dx.doi.org/10.5281/zenodo.34291

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