Sweetpotato Production in the United States

Smith, T. P.; Stoddard, Scott; Shankle, Mark W.; Schultheis, Jonathan R.

doi:10.1007/978-1-4020-9475-0_14

Cited by 34 publications

(41 citation statements)

References 22 publications

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“…The origin of Northern Star is Laloki, PNG, where soil temperature ranges from 15°C to 22°C (Moody & Radcliffe, ); hence, Northern Star may respond best to low RZT, even the short‐term increase in RZT in this study may have caused physiological damage and a reduction in storage root dry‐biomass. Beauregard, on the other hand, is an improved cultivar of high yield potential developed by the Louisiana State University Agricultural Experiment Station in 1987 through systematic breeding from a Central America ancestor (Smith, Stoddard, Shankle, & Schultheis, ). As annual soil temperature in Louisiana State is approximately 24°C at 10–20 cm from soil surface (Hu & Feng, ), Beauregard may better tolerate higher RZT.…”

Section: Discussionmentioning

confidence: 99%

Root zone temperature alters storage root formation and growth of sweetpotato

Taranet

Kirchhof

Fujinuma

et al. 2018

J Agronomy Crop Science

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Large mounds amended with plant residues are a common cultivation method for sweetpotato (Ipomoea batatas) in the western parts of the Papua New Guinea highlands, with a suggested benefit of elevated root zone temperature (RZT) from decomposition. This study aimed to evaluate whether RZT affects the formation and growth of sweetpotato storage roots. Experiments evaluated the effects of a constant elevated RZT on the Beauregard cultivar and of a short‐term increase in RZT on the Beauregard and Northern Star cultivars. Plants were grown in 18‐L pots divided into a control compartment (constant RZT at 20°C) and a treated compartment (RZT at 30, 40 or 50°C). Constant elevated RZT was maintained until harvest, while short‐term increase in RZT occurred in weeks 2 and 3 only. Constant elevated RZT did not affect the total number of storage roots, but RZT of 30°C and above reduced the dry‐biomass of storage roots. The short‐term increase in RZT did not alter the total number or dry‐biomass of storage roots in Beauregard, while both of these attributes were reduced at RZT of 40°C or above in Northern Star. Elevated RZT inhibited dry‐biomass accumulation of storage root, with a more pronounced impact at constant elevated RZT. These results demonstrate that any benefits of the mound culture on sweetpotato yield production do not arise through the influence of temperature elevation.

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Section: Discussionmentioning

confidence: 99%

Root zone temperature alters storage root formation and growth of sweetpotato

Taranet

Kirchhof

Fujinuma

et al. 2018

J Agronomy Crop Science

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“…Lack of sufficient rainfall or timely irrigations during the summer in the southern United States limits sweetpotato yield and affects the quality of storage roots causing significant economic losses to producers (Smith et al, 2009). Soil moisture surplus during the crop maturation period also negatively affects final yield and quality (Thomson et al, 1992;Rao and Li, 2003;Siqinbatu et al, 2013).…”

mentioning

confidence: 99%

Sweetpotato Responses to Mid‐ and Late‐Season Soil Moisture Deficits

Gajanayake

Reddy

2016

Crop Science

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Soil moisture‐dependent, quantitative information on sweetpotato [Ipomoea batatas L. (Lam)] plant processes is vital for crop management and modeling because of the projected shrinking and uneven distributions of rainfall and irrigation water supply due to climate change. This study was conducted to quantify the growth, physiology, biomass, and storage root yield responses of sweetpotato under four evapotranspiration‐based irrigation treatments (100, 60, 40, and 20% ET) in sunlit growth chambers. Irrigation treatments were imposed from 41 to 97 d after transplanting. Midday leaf water potentials (LWP) and soil moisture contents were measured throughout the experiment. Gas exchange and other physiological measurements were recorded during last 3 wk of the experiment. Plant growth and developmental parameters were measured at 97 d after transplanting. The midday LWP was strongly and linearly correlated with soil moisture content showing the interplay between these two processes. Net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) declined while photosynthetic water‐use efficiency (Pn/Tr) increased with decreasing LWP. Both total chlorophyll content and cell membrane thermostability (CMT) declined linearly with decreasing LWP. Vine length, leaf area, and node number per plant decreased linearly, by 3.2 cm, 96.6 cm2, and 0.39 no. plant−1, respectively, per unit change in ET‐based irrigation. The optimum soil moisture for total plant and storage root dry weights were obtained under the irrigation treatments of 100 and 72% ET, respectively. Biomass partitioning to storage roots declined linearly and leaf and stem portioning increased with increased irrigation. Outcomes of this research will help producers schedule irrigation to maximize yield and researchers to develop sweetpotato crop models.

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“…In the US, the leading variety, 'Beauregard' (copper-rose skin and yellow flesh), is a polycross selection released by the Louisiana State University and occupies nowadays approximately 65% of the area planted annually (Smith et al, 2009). Another important variety in the US is 'Covington,' released by North Carolina Agricultural Research Station in 2005, which is estimated to occupy 30% of the sweet potato production area (Carpena, 2009).…”

Section: Breedingmentioning

confidence: 99%