scholarly journals Correlation analysis of the SPAD readings and yield of sweet potato (Ipomoea batatas L.) under different agrotechnical conditions

2020 ◽  
pp. 761-765
Author(s):  
Péter Pepó
Keyword(s):  
Sweet Potato ◽  
Strong Correlation ◽  
Ipomoea Batatas ◽  
Vegetation Period ◽  
High Yield ◽  
Row Spacing ◽  
Marketable Yield ◽  
Lattice Design ◽  
Planting Method ◽  
Spad Readings

We studied the effect of planting method (flat and ridge planting) and row spacing (0.75-1.0 m) on the yield and SPAD readings of sweet potato (Ásotthalmi 12 variety) in a small-plot field experiment in 2017 and 2018. The experiment was set up in lattice design with 4 replications. The SPAD readings of sweet potato were measured four (2017) and three (2018) times during vegetation period (by Konica Minolta 502). A high yield level was reached both in 2017 (23.23-50.69 t ha-1 marketable yield) and 2018 (33.26-47.34 t ha-1) due to the effects of the favourable soil (chernozem), the near-optimal agrotechnical background, irrigation and the warmer-than-average vegetation period. In both years, higher yields were obtained with flat planting and 0.75 m row spacing. The proportion of non-marketable tubers was between 9.97-15.57% in 2017 and 8.65-11.01% in 2018. The SPADmax values were measured in July (39.61-50.31 in 2017) and in August (49.90-55.33 in 2018). Strong correlation observed among SPAD readings, the whole yield and the marketable yield in both years (r = 0.632*, r = -0.664* and r = 0.709**, respectively). Also, a strong correlation was observed between the planting method and the obtained SPAD readings (r = -0.847**, -0.682* in 2017 and r = -0.634*, -0.488 in 2018, respectively), while there was no correlation between row spacing and SPAD readings (r = -0.006NS-0.190NS). Crop year had a strong effect on SPAD readings (r = 0.639**-0.871**).

Yield and Yield Components of Six Sweet Potato (Ipomoea batatas) Cultivars II. Variability and Possible Sources of Variation

1975 ◽  
Vol 11 (1) ◽  
pp. 49-58 ◽  
Author(s):  
S. B. Lowe ◽  
L. A. Wilson
Keyword(s):  
Sweet Potato ◽  
Yield Components ◽  
Ipomoea Batatas ◽  
Total Yield ◽  
Yield Variability ◽  
Tuber Development ◽  
Marketable Yield ◽  
Yield Variation ◽  
Planting Material ◽  
Sources Of Variation

SUMMARYVariabilities in total yield, marketable yield and components of yield (tuber numbers and mean tuber weights) were studied in six sweet potato cultivars over two seasons, in crops harvested at two dates. Yield variability was high, particularly in marketable tubers, and was related to either or both components of yield. High-yielding cultivars had lower variabilities and the commercial cultivar 049 the lowest. The contribution of yield components to variability in total yield was evaluated and sources of yield variation were attributed to planting material, tuber development and season.

scholarly journals Participatory Varieties Selection and Evaluation of Improved Sweet Potato (Ipomoea batatas (L.) On-Farm at Different Agro-ecologies in Wolaita Zones Southern, Ethiopia

2019 ◽  
pp. 1-6
Author(s):  
Birhanu Lencha Kiffo
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
High Yield ◽  
Average Score ◽  
Southern Ethiopia ◽  
Preliminary Evaluation ◽  
Sweet Potatoes ◽  
Participatory Varietal Selection ◽  
Check Variety ◽  
Yield Quality

Aim: Ethiopia is considered to be one of the major producers of sweet potato and involves major lands for this purpose. Whereas, varieties of sweet potato that yields maximum are not yet known. So this particular study is aimed to identify the variety for high yield, quality sweet potato, as well as its quantitative evaluation to be done. Materials and Methods: Area situated at Wolaita zone of SNNP regional state is considered as study venue; whereas the performance of fields is evaluated and specified the number of crop yield of that particular area. Results and Discussion: Eleven sweet potato varieties and four local varieties were prepared for the preliminary evaluation. Observations came up with the following varieties namely OFSP1, Kulfo, Koka 6 and Hawassa 83 which were mostly preferred by farmers. Both sweet potatoes had high acceptability; with an average score of 10,11,12,16, (A) and 17, 18 19, (B) out of a maximum of 20, without any significant differences in preference. The varieties were divided into four sets, with each set having two test varieties and the check variety. This is to ensure that farmers will not have difficulty in evaluating and comparing too many varieties. Conclusion: Variety of the potatoes that are preferred by the farmers is different from each other, which are come up with Participatory varietal selection (PVS) technique. So as differences in ranking are also preferred by them, which later ensure the genetically diverse factors and differentials in growing yield of the crops.

scholarly journals 451 Evaluating Skin-set of the Sweetpotato

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 522C-522 ◽  
Author(s):  
Lewis W. Jett
Keyword(s):  
Ipomoea Batatas ◽  
Mechanical Treatment ◽  
Disease Incidence ◽  
Moisture Loss ◽  
High Yield ◽  
Testing Device ◽  
Marketable Yield ◽  
Yield And Quality ◽  
Mechanical Methods ◽  
Shear Tester

Skinning of sweetpotatoes [Ipomoea batatas (L.) Lam] can reduce marketable yield and quality. The `Beauregard' sweetpotato, despite its consistent high yield and quality, is very susceptible to skinning injury during harvest. A research project was initiated to investigate chemical and mechanical methods to improve skinset of `Beauregard' sweetpotato. Approximately 14 days before harvest, Desicate II and Enquik (dihydrogen tetraxosulfate) were applied to the sweetpotato vines as a broadcast spray. Mechanical methods evaluated included mowing with a flail-type mower or pulling (vine detachment) 7 days before harvest. Skin-set was measured using a Halderson periderm shear tester fitted to a torquometer. The Enquik + Desicate II treatment significantly desiccated the vines relative to application of Desicate II alone. The skin set testing device was sensitive enough to detect differences between treatments. The highest skin-set reading was obtained from the pulled vine treatment. Marketable yield was not affected by application of any chemical or mechanical treatment. Curing of skinned sweetpotatoes(4 days; 30 °C; 90% relative humidity) significantly reduced postharvest moisture loss and disease incidence.

scholarly journals Effect of planting methods on growth and yield of sweet potato (Ipomoea batatas L.) varieties at Luyengo, midlevel of Eswatini

2021 ◽  
Vol 11 (1) ◽  
pp. 013-021
Author(s):  
Sakhile Sipho Dlamini ◽  
Mzwandile Petros Mabuza ◽  
Bonginkhosi Edward Dlamini
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Growth And Yield ◽  
Storage Root ◽  
Root Yield ◽  
Storage Roots ◽  
Potato Varieties ◽  
Planting Methods ◽  
Method Of Planting ◽  
Planting Method

Sweet potato (Ipomoea batatas L.) is the most grown storage root crop in Eswatini. However, its storage root yield is low among smallholder farmers partly due to use of inappropriate varieties and agronomic practices such as planting method. Thus, a field experiment was conducted at the University of Eswatini, Faculty of Agriculture, Luyengo, during 2019/2020 cropping season to determine the effects of planting method on growth and yield of the three sweet potato varieties. Two planting methods, namely horizontal and vertical; and three sweet potato varieties, namely Kenya-white, Ligwalagwala and Lamngititi were evaluated in a factorial arrangement in randomized complete block design in three replications. Results showed non-significant difference between the planting methods in most growth and yield parameters recorded for the sweet potato varieties. However, the vertical method of planting had relatively higher vine length, number of branches, mass of storage roots and storage root yield than the horizontal method. On the other hand, there were significant (P<0.05) differences among the sweet potato varieties for most of parameters recorded. The sweet potato variety Ligwalagwala had the highest vine length, number of storage roots per plant (6.47), mass of storage roots per plant (1137 g) and storage root yield (12.01 tonnes/ha). Thus, either horizontal or vertical method of planting and variety Ligwalagwala can be used to increase the productivity of sweet potato in the study area.

scholarly journals Daya hasil dan indeks panen ubi jalar unggul baru berdaging kuning (Ipomoea batatas L. (Lam.))

Jurnal Agro ◽  
10.15575/5704 ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 24-31
Author(s):  
Agung Karuniawan ◽  
Reviana Aulia ◽  
Haris MAulana ◽  
Debby Ustari ◽  
Neni Rostini
Keyword(s):  
Sweet Potato ◽  
Harvest Index ◽  
Ipomoea Batatas ◽  
Block Design ◽  
Total Weight ◽  
High Yield ◽  
Tuber Weight ◽  
Randomized Block Design ◽  
Superior Genotypes ◽  
Supporting Material

Estimasi daya hasil dan indeks panen dalam pemuliaan tanaman dibutuhkan untuk menyeleksi genotip ubi jalar. Genotip ubi jalar terseleksi yang berdaya hasil tinggi dapat digunakan sebagai bahan pendukung diversifikasi pangan. Tujuan dari penelitian ini adalah untuk memperoleh genotip ubi jalar berdaya hasil tinggi serta memiliki indeks panen tinggi. Penelitian dilaksanakan di Kebun Percobaan Fakultas Pertanian Universitas Padjadjaran Kabupaten Sumedang, Jawa Barat dari bulan November 2018 sampai April 2019. Penelitian ini menggunakan delapan genotip ubi jalar dan tiga genotip pembanding (Ac Putih, Kidal, dan Rancing). Metode yang digunakan adalah rancangan acak kelompok (RAK) dengan 11 perlakuan yang diulang sebanyak tiga kali. Hasil penelitian menunjukkan bahwa jumlah ubi per tanaman, jumlah ubi total, jumlah ubi ekonomis, bobot ubi per tanaman, bobot ubi total dan bobot ubi ekonomis menunjukan perbedaan yang nyata. Terdapat tujuh genotip yang berdaya hasil tinggi yaitu MZ 332, PR 91 (838), Awachy 4, KMDK, IND 38 (48), IND 8 (11), IND 264. Terdapat empat genotip ubi jalar unggul baru yang memiliki hasil indeks panen > 1 yaitu, Mz 332, PR 91(838), KMDK, dan IND 8(11).  ABSTRACT Estimation of yield and harvest index on sweet potato are needed to select new superior genotypes of sweet potato in the breeding program. Selected sweet potato genotypes with high yield can be used as supporting material for food diversification. The purpose of this study was to obtain new superior genotypes of yellow-fleshed sweet potato with high yield and high harvest index. The study was conducted in the Experimental field, Faculty of Agriculture, Universitas Padjadjaran, Sumedang Regency, West Java from November 2018 to April 2019. This study used eight sweet potato genotypes as treatment and three genotypes as check i.e. Ac Putih, Kidal and Rancing. The method used was randomized block design (RBD) with 11 treatments repeated three times. The results showed that the numbers of tuber per plant, numbers of tuber per plot, numbers of economic tuber, weight of tuber per plant, total weight per plot, weight of economic tubers were significantly different. There are seven genotypes with the high yield, i.e. MZ 332, PR 91 (838), Awachy 4, KMDK, IND 38 (48), IND 8 (11), IND 264. Four genotypes with harvest index > 1 i.e. Mz 332, PR 91 (838), KMDK, and IND 8 (11).

High yield and pest resistant genotypes of sweet potato (Ipomoea batatas (L.) Lam.) for cultivation in Umudike, Southeastern, Nigeria

2021 ◽  
Vol 6 (4) ◽  
pp. 563-569
Author(s):  
J. I. Ulasi ◽  
R.S. Okim ◽  
E.U. Rivers
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Dry Matter ◽  
Starch Content ◽  
Principal Component ◽  
High Yield ◽  
Storage Root ◽  
Root Yield ◽  
Southeastern Nigeria ◽  
Cropping Seasons

Newly developed progenies of sweet potato were evaluated to identify promising genotypes with high storage root yield, dry matter, starch content and susceptibility to Cylas spp. at the National Root Crops Research Institute, Umudike, Southeastern Nigeria during the 2015 and 2016 cropping seasons to evaluate variation among crosses of different sweet potato families, namely: LigriXFaara (17), LigriXApomoen (9) and LigrixSauti (8), including two check varieties (Umuspo 3 and TIS 87/0087). Analysis of variance, correlation and principal component analysis were employed for data analysis. In this study, four genotypes; LigriXFaara/3 (16.02t/ha), LigriXFaara/2 (14.67t/ha), LigriXFaara/1 (13.66t/ha) and LigriXFaara/6 (10.33t/ha) produced higher fresh storage root yield than the national check (TIS 87/0087). Four genotypes recorded starch content above 50mg100-1; LigriXApomoden/1 (69.71mg100-1), LigriXApomoden/3 (62.98mg100-1), LigriXApomoden/2 (60.89mg100-1), LigriXApomoden/4 (57.53 mg100-1). Among the thirty-four genotypes evaluated, twenty-nine genotypes were susceptible to the attack of C. puncticollis. LigriXFaara/1 recorded the highest attack of C. puncticollis, followed by LigriXApomoden/5, LigriXFaara/4, LigriXApomoden/3, LigriXSauti/3, LigriXFarra/5 while five genotypes; LigriXFaara/4, LigriXFaara/5, LigriXSauti/5, LigriXFaara/8, LigriXFaara/7 and LigriXFaara/14 did not show any sign of vulnerability of C. puncticollis. Promising genotypes that recorded high yield, dry matter and resistance to Cylas spp. could be subjected to advanced yield trail and incorporated into further breeding program.

scholarly journals The Carbohydrate Yield of Sweetpotato (Ipomoea batatas) Grown from Slips and Root Pieces in North Carolina

HortScience ◽  
2015 ◽  
Vol 50 (11) ◽  
pp. 1610-1617 ◽  
Author(s):  
Nicholas A. George ◽  
Kenneth V. Pecota ◽  
G. Craig Yencho
Keyword(s):  
North Carolina ◽  
Ipomoea Batatas ◽  
Yield Potential ◽  
High Yield ◽  
Development Work ◽  
Human Consumption ◽  
High Carbohydrate ◽  
Environment Effects ◽  
Planting Method ◽  
High Yield Potential

Sweetpotato (Ipomoea batatas) is one of the world’s most important and widely grown starch crops. It is usually produced for direct human consumption but can be readily converted to simple sugars that then have industrial end uses. The objective of this study was to compare the carbohydrate yield of the conventional sweetpotato cultivar, Beauregard, with new clones selected specifically for higher carbohydrate production. Ten sweetpotato clones were grown from both slips and root pieces at five locations, over 2 years, in North Carolina. A sweetpotato clone selected for high carbohydrate production, and planted as slips, yielded on average 4150 kg·ha−1 of carbohydrates, 10% to 15% higher than Beauregard. The chemical composition of roots was unaffected by planting method, but slips usually outyielded the same clone grown from root pieces. Carbohydrate yield was significantly impacted by genotype × environment effects in both slips and root pieces. We conclude that further work will be needed to develop sweetpotato clones with both high carbohydrate content and high yield potential, and that are also adapted to planting from root pieces. Any breeding and development work will need to take into account genotype × environment effects.

scholarly journals Effect of Combined Organic and Inorganic Fertilizer Application on Soil Attributes, Yield and Quality of Sweet Potato (Ipomoea batatas L.)

2020 ◽  
Vol 8 (4) ◽  
pp. 252
Author(s):  
Járisson Cavalcante Nunes ◽  
Jandiê Araújo Da Silva ◽  
Marcelo Barbosa Gomes Neto ◽  
Jair Costa Bezerra ◽  
Juliete Araújo da Silva Nunes ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Block Design ◽  
Poultry Manure ◽  
Residual Effect ◽  
Organic Fertilizers ◽  
Marketable Yield ◽  
Experimental Conditions ◽  
Soil Attributes

The use of organic fertilizers in adequate doses is an alternative to reduce the use of inorganic inputs, improving the soil chemical attributes, and increasing the production and quality of sweet potato. In this perspective, the objectives of this study were: (i) to evaluate the effects of fertilization with poultry and bovine manure, Ribumin®, and of conventional fertilization on soil attributes, production, and quality of sweet potato; and (ii) to evaluate the residual effect of organic fertilization on the production components and quality of sweet potato, in the second crop cycle. The two experiments were developed in the 2018/2019 crop year at the Agrotechnical School of the Federal University of Roraima (UFRR), Brazil. The treatments were arranged in a randomized block design with three replications, using a (2 × 5 × 2) + 1 factorial arrangement referring to two manure sources (bovine and poultry manure) and five doses, aiming at increasing the content of soil organic matter (1.35%) to 2.35; 3.35; 4.35, and 5.35%, in the absence and presence of Ribumin®, and an additional treatment referring to organomineral fertilization. For the evaluation of the second cycle, the residual effect of the manure was evaluated by applying only Ribumin® and conventional fertilizers. In the first cycle, the addition of 50.4 t ha-1 of bovine manure without Ribumin® provided the highest values of total (14.7 t ha-1) and marketable yield (14.6 t ha-1). However, the addition of poultry manure associated with the application of Ribumin® provided no increments in the sweet potato production components. Under the same experimental conditions, chemical fertilization can be replaced by fertilization with organic sources.

scholarly journals Sweet potato genotypes with potential for early harvesting planted in different seasons in central Puerto Rico

1969 ◽  
Vol 87 (3-4) ◽  
pp. 105-112
Author(s):  
Agenol González-Vélez
Keyword(s):  
Puerto Rico ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Root Weight ◽  
Fresh Market ◽  
Marketable Yield ◽  
Sweet Potato Weevil ◽  
Different Seasons ◽  
Important Trait ◽  
Planting Season

Eight genotypes of sweet potato (Ipomoea batatas) were evaluated in four different planting seasons in the central region of Puerto Rico. Planting was in June, September, December and March. Harvesting was at 120 days after planting and data collected included yield, number of non marketable roots, average root weight and percentage of roots affected by the sweet potato weevil (Cylas formicarius var. elengatulus). Genotypes 97-031, 98-040 and 98-022 showed marketable yield (approximately 15,000 kg/ha) when harvested at 120 days after planting and also roots with few lobes, an important trait for fresh market use. Planting season significantly affected yield in the genotypes evaluated. Yields when sweet potato was planted in June, March and September doubled that of the December planting. The planting season significantly affected the percentage of root damage by the sweet potato weevil. Sweet potato planted in March showed significantly less damage than that of the other planting seasons.

Sign in / Sign up

Export Citation Format

Share Document