Effect of pre-planting temperature and light treatments of seed tubers on potato yield and tuber size distribution

Haverkort, A. J.; Waart, M. van de; Bodlaender, K. B. A.

doi:10.1007/bf02358132

Cited by 10 publications

(6 citation statements)

References 12 publications

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“…Table 8 shows that storage of farm-saved seed in a diffused light, rather than the dark, increased yield (9.15 to 11.76 t ha ). There was no reduction in mean tuber weight or change in size distribution, so the higher yields were due to a greater number of tubers per plant, probably as a result of reduced top dominance and more stem formation following pre-sprouting in the light (Haverkort et al 1990). The diffused light also reduced the incidence of brown rot, albeit from an already low level.…”

Section: Resultsmentioning

confidence: 93%

Assessment of Opportunities for Burundian Small-Scale Potato Farmers to Increase Productivity and Income

Bararyenya

Nahayo²,

Nduwimana³

et al. 2018

Potato Res.

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1✉ 2 2 1 1 3 1 3 4,5 1 2 3 4 5 e.Proofing AbstractFrom 2014 through 2016, on-farm experiments were carried out in three provinces surrounding Bujumbura town in Burundi to improve the low potato (Solanum tuberosum) yields, which currently stand at about 6 t ha . It was hypothesised that in rain-fed conditions, improved varieties, healthier seed tubers, pre-sprouting in light, proper fertilisation and protection from late blight attack would improve yield and quality, such as tuber weight, tuber size and lower brown rot incidence. The treatments in the on-farm trials at five farms in each of three sites (15 replicates) were applied in two seasons, giving 30 replicates in 580 plots. The following treatments were compared with growers' current practices: introduction of two new varieties, use of early generation seed from a rapid multiplication scheme, earlier harvesting of a seed crop, seed storage in a diffused light store, and research-based timing and dose rate of fertilisers and fungicides. Marginal rates of return on investments were calculated at farm level and current and tested alternative technologies were compared. Costs and benefits of applying such techniques were calculated. An improved variety contributed up to 20% yield increase and healthier seed 80%. Early harvesting reduced yield by 30% and reduced incidence of brown rot in the current season, but increased it (from 21 to 39%) in the following season when tubers were replanted. Diffused light storage, alternating contact and systemic fungicide application, and application of chemical fertilisers resulted in 30, 50 and 60% yield increases, respectively. It was shown that it is possible to double yields and economic returns (marginal rates of return) under the growing conditions in Burundi when growers plant healthy pre-sprouted seed of a new variety and apply chemical fertilisers and fungicides. KeywordsAcceptable minimum rate of return Chemical fertilisers Diffused light store −1 e.Proofing

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Section: Resultsmentioning

confidence: 93%

Assessment of Opportunities for Burundian Small-Scale Potato Farmers to Increase Productivity and Income

Bararyenya

Nahayo²,

Nduwimana³

et al. 2018

Potato Res.

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“…Gamma-rays did not consistently increase the number of tubers per plant. The best results led to a 30 % increase, which is comparable to the use of physiologically young seed tubers (Haverkort et al, 1990a) or to the application of gibberellic acid to the crop (Bodlaender & van de Waart, 1989). The latter two methods, however, are preferred because they may represent more reliable methods to increase the number of tubers.…”

Section: Discussionmentioning

confidence: 95%

“…The number of main stems formed per tuber is mainly determined by the physio logical age of the tuber (e.g. Haverkort et al, 1990a). The soil conditions (moisture and temperature) before emergence may play a role but these were the same for all treatments within each trial, since doses of gamma-rays less than 27 Gy hardly af fected the time from planting to emergence.…”

Section: Ns Nsmentioning

confidence: 99%

Effects of gamma-irradiation of seed potatoes on numbers of stems and tubers.

Haverkort¹,

Langerak²,

Waart³

1991

NJAS

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In field trials with potatoes cv. Bintje, Jaerla and Spunta in which the seed tubers had been treated with gamma -rays from a 60Co source with doses varying from 0.5 to 27 Gy, tuber yield, harvest index and number of stems and tubers were determined. A dose of 3 Gy increased the number of tubers by 30% in Spunta in 2 out of 3 trials and by 17% in one trial in Jaerla, but it did not increase the number of tubers in Bintje. Doses of 9 or 10 Gy did not influence the number of tubers nor stems, and decreased harvest index. A dose of 27 Gy yielded off-type plants with reduced yield and number of tubers. gamma -Radiation affected the growth of the sprout apex, allowing lateral buds or divisions of the affected apex to develop into stems. To achieve larger numbers of tuber-bearing stems, tubers should preferably be irradiated at the start of sprout growth, about 5 months before planting. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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“…These results implied that plant density increase results in individual competition, and individual growth inhibition eventually leads to differences in the spatial distribution of potato tubers. Previous studies on potato have focused on analyzing tuber size and number (Haverkort et al, 1990 ; Wurrt et al, 1997 ); however, little is known about the impact of planting density on tuber spatial distribution.…”

Section: Introductionmentioning

confidence: 99%

Response of Potato Tuber Number and Spatial Distribution to Plant Density in Different Growing Seasons in Southwest China

Zheng

Wang²,

Nianxin

et al. 2016

Front. Plant Sci.

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The aim of this study was to explore the effects of different density treatments on potato spatial distribution and yield in spring and fall. Plant density influenced yield and composition, horizontal, and vertical distribution distances between potato tubers, and spatial distribution position of tuber weights. The results indicated that: (1) Spring potato yield had a convex quadratic curve relationship with density, and the highest value was observed at 15.75 × 104 tubers per hectare. However, the yield of fall potatoes showed a linear relationship with plant density, and the highest value was observed at 18 × 104 tubers per hectare; (2) Density had a greater influence on the tuber weight of spring potatoes and fruit number of single fall potatoes; (3) The number of potato tubers in the longitudinal concentration exhibited a negative linear relationship with density, whereas the average vertical distribution distance of tubers exhibited a positive incremental hyperbolic relationship. For spring and fall potato tubers, the maximum distances were 8.4152 and 6.3316 cm, and the minimum distances 8.7666 and 6.9366 cm, respectively; and (4) Based on the artificial neural network model of the spatial distribution of tuber weight, density mainly affected the number and spatial distribution of tubers over 80 g. Tubers over 80 g were mainly distributed longitudinally (6–10 cm) and transversely (12–20 cm) within the high density treatment, and the transverse distribution scope and number of tubers over 80 g were reduced significantly. Spring potato tubers over 80 g grown at the lowest density were mainly distributed between 12 and 20 cm, whereas those at the highest density were primarily distributed between 10 and 15 cm.

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Effect of pre-planting temperature and light treatments of seed tubers on potato yield and tuber size distribution

Cited by 10 publications

References 12 publications

Assessment of Opportunities for Burundian Small-Scale Potato Farmers to Increase Productivity and Income

Assessment of Opportunities for Burundian Small-Scale Potato Farmers to Increase Productivity and Income

Effects of gamma-irradiation of seed potatoes on numbers of stems and tubers.

Response of Potato Tuber Number and Spatial Distribution to Plant Density in Different Growing Seasons in Southwest China

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