Stduies on the Dry Matter Production of Sweet Potato : XI. The effect of deep placement of mineral nutrient on the tuber-yield of sweet potato

Tsuno, Yukindo; Fujise, Kazuma

doi:10.1626/jcs.37.273

Cited by 2 publications

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“…Earlier work suggests that storage root yield was improved with half the fertilizer applied prior to planting, either directly under the ridge or between 10 and 15 cm from the plants on a level with slightly below the depth at which the plants were set; the remainder being applied two to three weeks after planting (Steinbauer and Kushman, 1971). Tsuno and Fujise (1968) found that storage root yields were increased when K was banded 30 or 40 cm deep into the soil layer. The objective of this experiment was to evaluate the impact of fertilizer placement treatments on vine and storage root yield, root dry matter and elemental leaf and root concentration of sweetpotato.…”

Section: Introductionmentioning

confidence: 96%

Effect of fertilizer placement on storage root yield and leaf elemental concentration of Whatley/Loretan sweetpotato variety

Ahiabor¹,

Mortley²,

Bonsi³

et al. 2021

Afr. J. Agric. Res.

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Field studies were conducted to evaluate the effect of various fertilizer placements on nutrient uptake, growth responses, storage root yield and leaf elemental concentration of Whatley/Loretan sweetpotato [Ipomoea batatas (L.) Lam.]. The fertilizer placement treatments comprised broadcast (Br), banded at two different widths (Ba), side dressing (Sd) or applied in various combinations of the above, and an untreated check. Fertilizer rates were 135, 35 and 133 kg.ha -1 each of N, P and K based on soil test. At nine weeks after planting, the fifth fully expanded leaf from the tip of five plants was collected and analyzed for elemental concentration. The plants were harvested 101 days after transplanting and biomass data were collected.Vine yield for all placement treatments was equal to or exceeded that of the full rate broadcast. Yield of US # 1 roots was increased 78 and 72%, respectively, when 2/3 of the fertilizer was banded and tended to increase total storage root yield compared to the same, full or 2/3 the rate broadcast. Leaf N was highest with 1/3 Ba at planting with two side dressings, while leaf P was reduced by all treatments compared to the check. Leaf K was highest with 2/3 the rate Br at planting. Storage root N was lower than foliar N while root K increased with 1/3 Br combined with 1/3 Ba. Root Ca, Mg, Fe and B were not significantly affected by placement. Root Mn was lower than foliar Mn suggesting that sweetpotato distributes more Mn to foliage relative to storage roots. Generally, these results suggest that placement rather than quantity of fertilizer applied enhanced yield and elemental concentration.

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Section: Introductionmentioning

confidence: 96%

Effect of fertilizer placement on storage root yield and leaf elemental concentration of Whatley/Loretan sweetpotato variety

Ahiabor¹,

Mortley²,

Bonsi³

et al. 2021

Afr. J. Agric. Res.

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Factors determining the Thickening and the Shape of the Tuberous Root in Sweet Potato(<I>Ipomoea batatas</I> (L.) Lam.)

Sasaki

TSUMAGARI

NISHIHARA

et al. 2004

Japanese journal of crop science

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: The effects of irrigation at the early growth period on the thickening and shape of the tuberous roots in sweet potato were examined. The number and length of the tuberous roots were determined by 70 days after the planting(70 DAP). There was high positive correlation between the length and width of the tuberous roots, which indicated that the rate of lateral growth was higher in the long tuberous roots than in the short ones. The rate was higher in the irrigated plot than in the non irrigated plot. Width length ratio of the tuberous roots, which were diversed at the early growth period, tended to converge as the growth progressed. At the fi nal growth period, it was larger in the irrigated plot than in the non irrigated. The number of spindle type and long spindle type tuberous roots occupied 35 and 65 , respectively, of the total number at 70 DAP. At the fi nal growth period, however, most of the tuberous roots were of the spindle type in the irrigated plot, although many of them were still of the long spindle type in the non irrigated plot. These results indicate that the irrigation at the early growth period greatly affects the shape of the tuberous roots.

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Stduies on the Dry Matter Production of Sweet Potato : XI. The effect of deep placement of mineral nutrient on the tuber-yield of sweet potato

Cited by 2 publications

References 0 publications

Effect of fertilizer placement on storage root yield and leaf elemental concentration of Whatley/Loretan sweetpotato variety

Effect of fertilizer placement on storage root yield and leaf elemental concentration of Whatley/Loretan sweetpotato variety

Factors determining the Thickening and the Shape of the Tuberous Root in Sweet Potato(<I>Ipomoea batatas</I> (L.) Lam.)

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