scholarly journals Effect of planting pattern and season on some agronomic performances and yield of sweet potato cv. Japanese Orange

2019 ◽  
pp. 1067-1073
Author(s):  
Darika Bunphan ◽  
William F. Anderson
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Tuber Yield ◽  
Agronomic Traits ◽  
Dry Season ◽  
Fresh Weight ◽  
Planting Pattern ◽  
Tuber Fresh Weight ◽  
Branch Plant ◽  
Positive Correlations

Sweet potato (Ipomoea batatas (L.) is one of the most important root crops in the world. It is primarily grown as a second crop during the dry season in Thailand. Several cultivars are produced with some being imported from Japan, especially cv. Japanese Orange, Yellow and Purple which are popular because they have high value and are rich in phytochemicals. Thai farmers use only one planting pattern for production although there are five recommended patterns available. The objectives of this study were to investigate the effect of different planting patterns on yield, agronomic traits, and determine associations among agronomic traits of sweet potato cv. Japanese Orange. The experiments were conducted during the rainy and dry seasons of 2017. An RCBD with 5 planting patterns and 3 replications were used. Tuber yield, no. of tuber/plant, no. of tuber/ha, no. branch/plant, tuber diameter and tuber fresh weight were measured. The results revealed that during the rainy season, pattern 5 (three vines per hole) had highest tuber yield (11.2 ton/ha), no. of tubers/plant (7.7) and number of tubers/ha (408.9×103) whereas pattern 3 (one vine) had highest no of branches/plant (4.7) and tuber diameter (36.9 mm). In the dry season, patterns 1, 5 and 3 had the highest yields (7.13, 6.71 and 6.48 ton/ha, respectively) pattern 1 had significantly higher tuber fresh weight (84.17 g) than the other four patterns. Pattern 5 had the highest number of tubers/plant and number of tubers/ha during the dry season. We found positive correlations between tuber yield and number of tuber per plant, number of tuber per ha, vine length, vine girth, number of nodes per plant at 60 and 75 DAP.

Yield and Yield Components of Six Sweet Potato (Ipomoea batatas) Cultivars I. Contribution of Yield Components to Tuber Yield

1975 ◽  
Vol 11 (1) ◽  
pp. 39-48 ◽  
Author(s):  
S. B. Lowe ◽  
L. A. Wilson
Keyword(s):  
Sweet Potato ◽  
Yield Components ◽  
Ipomoea Batatas ◽  
Tuber Yield ◽  
Total Yield ◽  
Tuber Number ◽  
Tuber Weight ◽  
Marketable Yield ◽  
Yield And Yield Components ◽  
Positive Correlations

SUMMARYTotal yield and yield components (tuber numbers and mean tuber weights) of six local sweet potato cultivars were compared in wet and dry season crops. There were significant negative correlations between tuber number and mean tuber weight in five of the six cultivars, and positive correlations between these yield components and total yield, suggesting that cultivars may be grouped into ‘tuber number-tuber weight’ and ‘tuber weight’ types, as well as a ‘random type’ in which yield is related to neither component. Marketable yield tended to be directly related to both components, and cultivars with lower tuber numbers usually produced a higher percentage of marketable yields. The significance of these findings for sweet potato yield improvement is discussed.

scholarly journals Effect of potassium and zinc on growth, yield and economics of sweet potato (Ipomoea batatas L.) cv. CO-34

2017 ◽  
Vol 9 (1) ◽  
pp. 291-297
Author(s):  
Pravin Singh ◽  
Kavita Aravindakshan ◽  
I. B. Maurya ◽  
Jitendra Singh ◽  
Bhim Singh ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Tuber Yield ◽  
Foliar Application ◽  
Block Design ◽  
Maximum Yield ◽  
Growth Yield ◽  
Cost Ratio ◽  
Average Weight ◽  
Four Levels

A field experiment was conducted to study the effect of different levels of potassium and zinc on growth, yield and economics of sweet potato. The experiment was laid out on clay and loam soil by adopting randomized block design with factorial technique (FRBD). The sixteen treatments consisted of combination of four levels of po-tassium (0, 80, 100 and 120 kg/ha through muriate of potash and four levels of foliar zinc (control i.e. water spray, 10, 20 and 30ppm) through zinc sulphate. The individual application of potassium 120 kg K2O/ha significantly in-creased the number of tubers per plant (4.60), average weight of tuber (275.31 g), length of tuber (16.77 cm), diam-eter of tuber (5.69 cm), tuber yield per plot (9.71 kg), tuber yield per hectare (49.04 t) respectively as compared to control. With the foliar application of zinc (30 ppm) significant increase in number of tubers per plant (4.18), average weight of tuber (234.73 g), length of tuber (18.12 cm), diameter of tuber (5.16 cm), tuber yield per plot (8.33 kg) and tuber yield per hectare (42.05 t) was recordedas compared to control. The treatment combination (120 kg K2O+30ppm Zn) recorded the maximum yield parameters i.e. chlorophyll content (37.00 mg/100 g), average weight of tuber (302.17 g), length of tuber (19.82 cm), diameter of tuber (5.97 cm), maximum tuber yield per plot (11.02 kg), tuber yield per hectare (55.67 t) and benefit-cost ratio (B: C ratio) of 4.22:1.While, the treatment (120 kg K2O+30ppm Zn) had the maximum number of tuber (4.86), minimum number of tuber was recorded in control. From the experi-ment, it appeared that application of potassium and zinc can be used to improve yield and higher net monetary re-turns of sweet potato.

scholarly journals Morphoagronomic characterization of sweet potato accessions from the germplasm bank of Embrapa hortaliças

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
Rosa maria de Deus De Sousa ◽  
José Ricardo Peixoto ◽  
Geovani Bernardo Amaro ◽  
Michelle Sousa Vilela ◽  
Paula Andrea Osorio Carmona
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Agronomic Traits ◽  
Block Design ◽  
Branch Length ◽  
Leaf Color ◽  
Germplasm Bank ◽  
Immature Leaf ◽  
Productive Potential ◽  
Branch Weight

Studies on the determination of genetic divergence among genotypes are important tools in breeding programs, contributing to the identification of parents with considerable productive potential. However, little is known about the combinatorial capacity of sweet potato (Ipomoea batatas) accessions and its adaptation to the different regions of Brazil. The objective of this study was to evaluate the morpho-agronomic traits from 102 sweet potato accessions from the Germplasm Bank of Embrapa Hortaliças. The experiment was laid out as an augmented block design comprised of 102 treatments. Nineteen above ground traits were measured using descriptors for the respective parts. Estimated values of broad sense heritability were high for the traits mean branch length (95.75%), immature leaf color (85.06%), and predominant branch  color (90.57%). Coefficients of environmental variation were below 30.00% for all variables, except for branch weight (51.62%). The 102 clones analyzed presented broad genetic variability for the different traits evaluated, especially for branch weight, and branch length, and mature leaf color.

scholarly journals Morpho-agronomic characterization of sweet potato germplasm

2017 ◽  
Vol 35 (4) ◽  
pp. 534-541 ◽  
Author(s):  
Rodrigo P Alves ◽  
Arie F Blank ◽  
Alisson Marcel S Oliveira ◽  
Aléa Dayane D Santana ◽  
Vanderson S Pinto ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Agronomic Traits ◽  
Phenotypic Variability ◽  
Block Design ◽  
Leaf Shape ◽  
Dry Mass ◽  
Good Prospect ◽  
Aboveground Part ◽  
Potato Germplasm

ABSTRACT Sweet potato (Ipomoea batatas) spreads mainly by vegetative propagation, and therefore this vegetable may have duplicate accessions in germplasm banks. The authors aimed to characterize morpho-agronomically the sweet potato germplasm from the Active Germplasm Bank (AGB) of Universidade Federal de Sergipe (UFS).The experiment was carried out at the Research Farm “Campus Rural da UFS”. The experimental design was a randomized block design, testing 73 sweet potato accessions with two replicates and four plants per plot. Morpho-agronomic traits of aboveground part and roots were evaluated. We observed that the leaf lobe type, the number of lobes per leaf, shape of central lobe, and general leaf shape were traits which provided the most variability among the accessions. For damage caused by soil insects, 52 accessions showed tolerance. The accessions presented a range from 0.33 to 2.71 t/ha for dry mass of aboveground part and from 1.20 to 10.89 t/ha for the total productivity of the roots. The high phenotypic variability of this crop shows good prospect for breeding programs.

EFFECTS OF WATER AVAILABILITY AND VINE HARVESTING FREQUENCY ON THE PRODUCTIVITY OF SWEET POTATO IN SOUTHERN MOZAMBIQUE. I. STORAGE ROOT AND VINE YIELDS

2001 ◽  
Vol 37 (4) ◽  
pp. 523-537 ◽  
Author(s):  
F. Gomes ◽  
M. K. V. Carr
Keyword(s):  
Sweet Potato ◽  
Water Use ◽  
Water Availability ◽  
Dry Weight ◽  
Dry Season ◽  
Storage Root ◽  
Fresh Weight ◽  
Supplementary Irrigation ◽  
Dry Seasons ◽  
Water Use Efficiencies

In Mozambique the sweet potato (Ipomoea batatas) is often grown as both a leafy vegetable, the terminal shoots or vines being progressively harvested during the season, and as a root crop. This paper reports the results of experiments designed to evaluate the effects of drought and vine harvesting frequency on the productivity of both yield components (cv. TIS 2534). Experiments were conducted during the rainy and dry seasons, with supplementary irrigation treatments superimposed. As the frequency of vine harvesting (equivalent to the number of harvests) increased, the total fresh weight of vines increased. There was a corresponding reduction in the yield of storage roots, however, particularly under well-watered conditions. As a result, the total harvested yield (vines plus roots) was remarkably stable in both wet and dry seasons (43–45 t ha−1 fresh weight). The cumulative dry weight of harvested vines increased with the number of harvests at constant rates, depending on water availability (from +150 to +250 when rain-fed, up to +340 to +440 kg ha−1 harvest−1 when irrigated). The corresponding rates of reduction in storage root yields varied from −3 to −130 (rain-fed) down to 310 to 400 kg ha−1 harvest−1 (irrigated). Total dry weight yields under well-watered conditions were constant at about 11 to 13 t ha−1, or double this on an annual basis. Irrigation water-use efficiencies (by dry weight of harvested crop) were generally higher in the dry season than in the rains. For vine production they increased with the number of harvests from 1.6 to 3.5 (rains) up to 0.9 to 6.7 kg ha−1 mm−1 (dry season). The corresponding values for root production were 7.5 to 13.1 (rains) and 12.2 to 19.1 kg ha−1 mm−1 (dry season). For the combined dry weight yields the water-use efficiencies were, with one exception, independent of harvesting frequency at 11.2 (rains) and 19.0 kg ha−1 mm−1 (dry season). Irrigated plants harvested at weekly intervals yielded vine dry weights of about 0.5–0.6 t ha−1 week−1. Compensatory vine growth (reported elsewhere) was observed in previously droughted plants following a rainfall event. The practical implications of these results are discussed. Future papers describe in more detail the physiological aspects of the observed yield responses.

Analysis of growth and tuber yield in sweet potato (Ipomoea batatas) cultivars

1977 ◽  
Vol 88 (2) ◽  
pp. 421-430 ◽  
Author(s):  
B. A. C. Enyi
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Dry Matter ◽  
Tuber Yield ◽  
Dry Weight ◽  
Tuber Weight ◽  
Crop Growth Rate ◽  
Growing Seasons ◽  
Total Dry Weight ◽  
Bulking Rate

SUMMARYGrowth and tuber yield of local sweet potato cultivars were compared during the 1974 and 1975 growing seasons. Three cultivars significantly outyielded the others. The cultivar effect was associated with differences in individual tuber weight, rate of bulking and percentage of total dry matter diverted into the vine or stem. Mean crop growth rate (C) and percentage of total dry matter diverted into the tubers were greater in the higher yielding cultivars and there was positive and significant correlation between Cand final total dry weight. Leaf area duration (D) was greater in 1975 than in 1974 but the differences between cultivars in D was not consistent. Higher yielding cultivars had significantly greater tuber/leaf ratio than the other cultivars.Bulking rate and tuber weight were positively correlated with tuber yield, while the percentage of total dry matter diverted into the vine was negatively correlated with tuber yield.

EFFECTS OF WATER AVAILABILITY AND VINE HARVESTING FREQUENCY ON THE PRODUCTIVITY OF SWEET POTATO IN SOUTHERN MOZAMBIQUE. II. CROP WATER USE

2003 ◽  
Vol 39 (1) ◽  
pp. 39-54 ◽  
Author(s):  
F. GOMES ◽  
M. K. V. CARR
Keyword(s):  
Sweet Potato ◽  
Water Use ◽  
Water Availability ◽  
Rainy Season ◽  
Ipomoea Batatas ◽  
Root Zone ◽  
Sandy Loam ◽  
Dry Season ◽  
Crop Water ◽  
Crop Water Use

In Mozambique, the sweet potato (Ipomoea batatas) is grown in the dry season in areas with a high water table, or as an irrigated crop. It is also grown in the rainy season when short-term droughts can occur. This paper reports the results of experiments designed to evaluate the effects of water availability and vine-harvesting practices on actual crop water use (cv. TIS 2534), during two contrasting seasons in the south of the country. Rain-fed crops extracted water to soil depths (variable sandy loam) of 0.75 m, with most (90%) taken from the top 0.25 m. Well-irrigated crops apparently obtained some (10%) water from below 0.75 m, but most (75%) came from the upper 0.25 m. Total water use from well-watered crops was about 800 mm during the rains, and 550 mm during the dry season. The corresponding values for rain-fed crops were 360 and 180 mm respectively. Peak rates of water use averaged 8 mm d−1 in the rainy season, and 5–6 mm d−1 in the dry season. Water use was not modified by the frequency of vine harvests. Actual rates of evapotranspiration fell below maximum values when the soil water deficit exceeded only 20 mm. By comparison, the maximum depth of extractable water in the root zone was 80–90 mm. The crop coefficients (Kc) for each stage of growth were consistent over both seasons and estimated to be: 0.55–0.7 (crop establishment), 1.1–1.2 (mid-season), and 0.8 (end-season).

scholarly journals Genetic differentiation of Slovenian sweet potato varieties (Ipomoea batatas) and effect of different growing media on their agronomic and nutritional traits

2017 ◽  
Vol 11 ◽  
Author(s):  
Lovro Sinkovič ◽  
Barbara Pipan ◽  
Vladimir Meglič ◽  
Nataša Kunstelj ◽  
Marijan Nečemer ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Genetic Relatedness ◽  
Agronomic Traits ◽  
Garden Soil ◽  
Total Phenolic ◽  
Base Number ◽  
Growing Media ◽  
Potato Varieties ◽  
Ground Part

The objectives of the present study were firstly to analyse the genetic relatedness among three Slovenian sweet potato varieties; and secondly to assess the effects of different growing media on selected agronomic and nutritional traits of these varieties. Tubers of three varieties ('Lučka', 'Janja', 'Martina') with different skin/flesh colour were produced in planters under glasshouse conditions in five different growing media (perlite, peat, expanded clay, vermiculite, garden soil) from prior raised seedlings. Genetic analysis was performed using a set of eight SSR markers. According to Nei’s genetic distance and pairwise population Fst analysis, the most related varieties are 'Janja' and 'Martina'; in contrast, 'Lučka' and 'Martina' show the weakest geneticrelationships. The following agronomic traits were evaluated: vine length, thickness of vine-base, number of branches, weight of above ground part, number of leaves plant-1, number of tubers plant-1 and tubers weight plant-1. Between nutritional traits total phenolic content (TPC), antioxidant potential (AOP) and ascorbic acid content (AA) were determined in the range: 36.2 to 65.1 mg GAE 100g-1 FW, 0.18 to 0.56 mg TE g-1 FW and 13.7 to 23.5 mg 100g-1 FW, respectively. Significant interactions of growing media (factor A) × variety (factor B) were observed for thickness of vine-base, weight of above ground part, AOP, TPC and AA. Overall, results showed variation in varieties response to growing media. Growing media provide a discriminant classification of the sweet potato varieties according to their agronomic and nutritional traits.

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