Combined Effect of Plant Spacing and Time of Earthing up on Tuber Quality Parameters of Potato (Solanum tuberosum L.) at Degem District, North Showa Zone of Oromia Regional State

Processing quality parameters within different sections of potato (Solanum tuberosum L.) tubers grown in Manitoba were measured to determine variability within tubers and to determine if whole tuber quality could be predicted from a specific section. The section that provided the best prediction of overall tuber quality parameters was determined. Changes in specific gravity (SG) and sugars in the outside and the inside of tubers during several months of storage were also measured. Dry matter (DM) of potato cvs. Russet Burbank and Shepody was generally higher at the apical and stem ends than in the middle section and was significantly higher in the outside than in the inside of the tuber. Sucrose concentration generally decreased from the stem end to the apical end of the tuber in Russet Burbank but increased from the stem end to the apical end in Shepody. Sucrose, glucose, and fructose were generally greater, though not always significantly, in the inside of the tuber compared with the outside with the exception of sucrose in Shepody where it was somewhat higher in the outside section. Glucose and fructose generally decreased from stem end to apical end although the difference between the two ends was significant only in Shepody. There was more variability in DM and the three sugars within Shepody tubers than those of Russet Burbank. The outer section of the tuber at the centre of the longitudinal axis (CO) was, overall, most highly correlated to the DM (r2 > 0.91) of the entire tuber for both cultivars and would be the most appropriate single location for estimating the DM of the entire tuber. Sugar concentrations of whole tubers could not consistently be estimated from that of any particular tuber location although the CO section had the highest correlations overall. During 6 mo storage SG did not change while sucrose decreased and glucose and fructose generally increased in both the outside (CO) and inside (CI) of the tuber. Linear regressions relating DM, SG, and sugars of the CO section to the whole tuber, and relating DM to SG were developed. Key words: Solanum tuberosum L., specific gravity, storage, processing, product quality

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Effects of Time of Earthing Up on Yield and Yield Parameters of Irish Potato (Solanum Tuberosum L.) in Zaka District, Zimbabwe

Agricultural Science ◽

10.30560/as.v1n1p39 ◽

2020 ◽

Vol 1 (1) ◽

pp. p39

Author(s):

Nyasha Sakadzo ◽

Fortune Tafirenyika ◽

Kasirayi Makaza

Keyword(s):

Solanum Tuberosum ◽

Tuber Yield ◽

Smallholder Farmers ◽

Solanum Tuberosum L ◽

Block Design ◽

Tuber Quality ◽

Marketable Tuber ◽

Yield Parameters ◽

Plant Emergence ◽

Four Levels

Potato (Solanum tuberosum L) is a strategic national food security crop in that can be used as a supplement for carbohydrates. It is the fastest growing staple food crop and source of income for poor smallholder farmers. There is limited documentation on effects of earthing up irish potatoes on yield and yield components in Zimbabwe. A field experiment was conducted in Zaka district of Masvingo province in Zimbabwe during the 2018/19 cropping season. The aim of the study was to investigate the effect of time of earthing up on yield and yield parameters of BP1 potato variety. The treatments consisted of four levels of time of earthing up (no earthing up (control), three, four and five weeks after plant emergence), replicated three times on a Randomized Complete Block Design (RCBD). Results on earthing-up at three weeks recorded significantly (P<0.013) the highest total tuber yield (21.97 t ha-1) which is 10% higher compared to no earthing up which recorded 14.43 t ha-1. Moreover, earthing up at two weeks had the least number of greening tuber yield (3%), 11% pest damaged tuber yield, 6% unmarketable tuber yield and 45% marketable tuber yield. This is in contrast with no earthing up which recorded 91% greening tuber yield, 25.3% on pest damaged tubers, 59% on unmarketable tubers and 10% marketable tuber yield. Based on the results, first earthing up should be done at three weeks after complete plant emergence at the study area under rain fed conditions for the production of potatoes with improved yield and better tuber quality.

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Effect of water stress on tuber quality (dumbel, pointed, cracks and total deformed tubers) in potato (Solanum tuberosum L.)

Annals of Horticulture ◽

10.5958/0976-4623.2021.00016.5 ◽

2021 ◽

Vol 14 (1) ◽

pp. 84-88

Author(s):

Subhash Kumar ◽

Devendra Kumar ◽

B. Singh ◽

Yash Pal Singh ◽

Pushpendra Singh ◽

...

Keyword(s):

Solanum Tuberosum ◽

Water Stress ◽

Solanum Tuberosum L ◽

Tuber Quality ◽

Effect Of Water

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Potato response to crop sequence and nitrogen fertilization following sod breakup in a Gleyed Humo-Ferric Podzol

Canadian Journal of Plant Science ◽

10.4141/p98-042 ◽

1999 ◽

Vol 79 (3) ◽

pp. 439-446 ◽

Cited By ~ 15

Author(s):

H. Li ◽

L. É. Parent ◽

C. Tremblay ◽

A. Karam

Keyword(s):

Solanum Tuberosum ◽

Crop Rotation ◽

Common Scab ◽

Solanum Tuberosum L ◽

Total Yield ◽

Tuber Quality ◽

Continuous Cropping ◽

Mineral N ◽

Silty Loam ◽

N Rates

Meadow soils could supply significant amounts of N for several years and reduce N requirements for the potato (Solanum tuberosum L.). We examined a combination of three crop sequences, three cultivars and six N rates in relation to tuber yield and quality. Superior, Kennebec and Snowden were grown as follows on a Tilly silty loam between 1993 and 1995: (1) 3-yr continuous potato cropping of Superior, (2) 3-yr continuous potato cropping starting with Snowden and followed by 2 yr of Kennebec, and (3) 3-yr sequence of Kennebec, oat (Avena sativa L. 'Marion') and Superior. There were six N treatments (0, 70, 105, 140, 175 and 210 kg N ha−1) and a split application of 140 kg N ha−1 (half at seeding and half before hilling). The seasons were either favorable to growth (1993), relatively wet (1994) or relatively dry (1995). In 1993 and 1994, total yield varied between 37 and 50 t ha−1. In 1995, continuous cropping of Kennebec and Superior produced 28 t ha−1 compared with 37 t ha−1 under crop rotation. The rotation increased total yield of Superior by 34% and graded yield by 42% in 1995. The N requirement was closely related to yield, rather than cultivar. Compared with continuous cropping of Superior, tuber-quality index was highest with the rotation for rhizoctonia (Rhizoctonia solani) (67 vs. 57) and common scab (Streptomyces scabies) (90 vs. 82). The incidence of both diseases decreased when at least 70 kg N ha−1 was applied. For common scab, skin coverages was higher at rates of 0, 175 and 210 kg N ha−1 than at intermediate rates of 70–140 kg N ha−1. Mineral N accumulated in the 0–60-cm layer in the interrow and increased rapidly when N rates exceeded 105 kg N ha−1. After sod breakup an N rate in the range of 70–100 kg N ha−1 and crop rotation with cereals sustained the productivity of the potato during 3 yr while minimizing the environmental impact of mineral N. Key words: Crop rotation, common scab, rhizoctonia, reduced N rates, Solanum tuberosum L.

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Effects of elevated CO2 and O3 on tuber quality in potato (Solanum tuberosum L.)

Agriculture Ecosystems & Environment ◽

10.1016/s0167-8809(01)00144-x ◽

2001 ◽

Vol 87 (3) ◽

pp. 273-285 ◽

Cited By ~ 25

Author(s):

Alison Donnelly ◽

Tracy Lawson ◽

Jim Craigon ◽

Colin R. Black ◽

Jeremy J. Colls ◽

...

Keyword(s):

Solanum Tuberosum ◽

Elevated Co2 ◽

Solanum Tuberosum L ◽

Tuber Quality ◽

Elevated Co2 And O3

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Effects of nitrogen fertiliser on potato (Solanum tuberosum L., cv. Russet Burbank) in Tasmania. 1. Yield and quality

Australian Journal of Experimental Agriculture ◽

10.1071/ea02099 ◽

2003 ◽

Vol 43 (6) ◽

pp. 631 ◽

Cited By ~ 9

Author(s):

L. A. Sparrow ◽

K. S. R. Chapman

Keyword(s):

Solanum Tuberosum ◽

Average Rate ◽

Solanum Tuberosum L ◽

Potato Crop ◽

Practical Importance ◽

Hollow Heart ◽

Field Trials ◽

Russet Burbank ◽

Tuber Quality ◽

Nitrogen Fertiliser

Thirteen field trials were conducted on ferrosols and tenosols in Tasmania to assess the response of potatoes (Solanum tuberosum L., cv. Russet Burbank) to basal (up to 250 kg/ha) and topdressed (up to 100 kg/ha) nitrogen fertiliser. Economic yield responses to basal nitrogen were obtained at 9 sites. Topdressing did not increase yield compared with equivalent rates of basal nitrogen, and often failed to compensate for a lack of nitrogen applied at planting. This lack of response may reflect the inability of the potato crop to make use of nitrogen applied during tuber bulking. Nitrogen fertiliser decreased tuber specific gravity at several sites. The effects of nitrogen on misshapen tubers, bruising susceptibility, crisp colour and hollow heart were inconsistent and often of no practical importance. However, at 2 sites, nitrogen fertiliser increased yields of misshapen tubers at the expense of processing tuber yields. At 1 of these sites, nitrogen topdressing decreased the yield of misshapen tubers. Otherwise, topdressing had similar effects on tuber quality to those of basal nitrogen. Growers should fertilise with nitrogen to optimise their yields. Optimum rates were greater in paddocks that had been continuously cropped for more than 10 years (average rate 193 kg/ha), than in those that had been in pasture (average rate 48 kg/ha).

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