Effects of nitrogen fertiliser on potato (Solanum tuberosum L., cv. Russet Burbank) in Tasmania. 2. Petiole and soil analysis

2003 ◽  
Vol 43 (6) ◽  
pp. 643 ◽  
Author(s):  
L. A. Sparrow ◽  
K. S. R. Chapman
Keyword(s):  
Solanum Tuberosum ◽  
Soil Nitrogen ◽  
Nitrate Nitrogen ◽  
Soil Analysis ◽  
Solanum Tuberosum L ◽  
Russet Burbank ◽  
Tuber Initiation ◽  
Nitrogen Status ◽  
Nitrogen Fertiliser ◽  
Nitrate Concentrations

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 and topdressed nitrogen fertiliser. The objectives of this study were to assess whether petiole nitrate concentrations could be used to indicate potato nitrogen status and crop response to nitrogen topdressing, and whether various soil nitrogen measures could be used to determine the responsiveness of potatoes to nitrogen fertilisation. Petiole nitrate-nitrogen concentrations in the youngest fully expanded leaves were found to be an indicator of nitrogen status. Critical nitrate concentrations varied in a linear fashion from about 25 000 mg/kg at tuber initiation to less than 5000 mg/kg when tubers were 100 mm long (about 100 days after planting). These concentrations are consistent with those determined for Russet Burbank in other studies. In contrast to petiole measures, various pre-plant and early season soil nitrogen measures (mineral, mineralisable and total nitrogen) did not adequately (adjusted R2<0.25) explain variation in crop nitrogen responsiveness and could not be recommended as diagnostic or predictive tests. Soil nitrogen mineralisation rates in spring varied from 0.4 to 5 kg N/ha.day and were higher at sites previously in pasture than at continuously cropped sites. Although petiole nitrate concentrations responded to nitrogen topdressing, most nitrogen-deficient crops in this study did not show yield responses to topdressed nitrogen. This limited the usefulness of petiole nitrate-nitrogen tests.

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

2003 ◽  
Vol 43 (6) ◽  
pp. 631 ◽  
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).

Cytokinins and Tuber Initiation in the Potato Solanum tuberosum L.

Nature ◽  
1969 ◽  
Vol 221 (5177) ◽  
pp. 279-280 ◽  
Author(s):  
C. E. PALMER ◽  
O. E. SMITH
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Tuber Initiation

scholarly journals Effect of Ethylene on Tuber Initiation in Solanum tuberosum L.

Nature ◽  
1969 ◽  
Vol 223 (5213) ◽  
pp. 1387-1387 ◽  
Author(s):  
A. H. CATCHPOLE ◽  
J. HILLMAN
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Tuber Initiation

BIOMAGNETIC RESPONSES IN POTATOES

1972 ◽  
Vol 52 (5) ◽  
pp. 727-733 ◽  
Author(s):  
U. J. PITTMAN
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Magnetic Treatment ◽  
Metabolic Process ◽  
Tuber Initiation

Plants grown in the greenhouse from excised magnetically treated eyes of the Netted Gem potato, Solanum tuberosum L., yielded a greater weight and a greater number of tubers than those grown from untreated eyes. Pregermination magnetic treatment of the eyes sometimes produced an increase in top growth of plants. Plants grown in the field from excised magnetically treated eyes yielded 14% more marketable tubers that weighed 38.5% more than those grown from untreated eyes. Pregermination magnetic treatment of the eye may have effected a change in the metabolic process in the bud that eventually promoted earlier and greater tuber initiation.

scholarly journals Sources of Tyrosine in Genotypes of Solanum tuberosum L. Differing in Capacity to Produce Melanin Pigments

1994 ◽  
Vol 119 (4) ◽  
pp. 770-774 ◽  
Author(s):  
Robert P. Sabba ◽  
Bill B. Dean
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Russet Burbank ◽  
Chorismate Mutase ◽  
Limiting Factor ◽  
Potato Tubers ◽  
Third Order ◽  
Physiological Disorder ◽  
Pigment Formation ◽  
Tuber Protein

Potato tubers (Solanum tuberosum) of genotypes that vary in resistance to dark pigment formation when damaged, characteristic of the physiological disorder blackspot, were assayed for free tyrosine. The tubers were also assayed for relative levels of chorismate mutase and proteinase activities, which can regulate free tyrosine levels. The susceptibility of potato tubers to blackspot was shown to be correlated to the amount of free tyrosine by third order regression (R = 0.88). Tyrosine was found to be a limiting factor in pigment development. Chorismate mutase activity (CMI and CMII) was not correlated to blackspot susceptibility of the genotypes studied. Proteinase activities of Atlantic, TXA 763-5, Ranger Russet, Russet Burbank, and Lemhi Russet tuber protein extracts measured with synthetic substrates correlated with blackspot susceptibility. This suggests that the high free tyrosine levels associated with blackspot susceptibility may be due to high levels of proteinase activity in the tuber, rather than tyrosine synthesis.

Effects of N, K, and Cl on Nitrogen Components of Russet Burbank Potato Plants ( Solanum tuberosum L.) 1

1973 ◽  
Vol 65 (6) ◽  
pp. 868-870 ◽  
Author(s):  
I. P. Murarka ◽  
T. L. Jackson ◽  
D. P. Moore
Keyword(s):  
Solanum Tuberosum ◽  
Russet Burbank Potato ◽  
Solanum Tuberosum L ◽  
Russet Burbank ◽  
Potato Plants

Effect of rate and timing of potassium chloride application on the yield and quality of potato (Solanum tuberosum L. ‘Russet Burbank’)

2012 ◽  
Vol 92 (4) ◽  
pp. 783-794 ◽  
Author(s):  
Ramona M. Mohr ◽  
Dale J. Tomasiewicz
Keyword(s):  
Solanum Tuberosum ◽  
Potassium Chloride ◽  
Solanum Tuberosum L ◽  
Russet Burbank ◽  
Soil Test ◽  
Marketable Yield ◽  
Yield And Quality ◽  
K Concentration ◽  
Soil Test K

Mohr, R. M. and Tomasiewicz, D. J. 2012. Effect of rate and timing of potassium chloride application on the yield and quality of potato ( Solanum tuberosum L. ‘Russet Burbank’). Can. J. Plant Sci. 92: 783–794. Potassium is frequently applied to irrigated potato in Manitoba. Field experiments were conducted at two sites in each of 2006, 2007 and 2008 to assess effects of rate and timing of potassium chloride (KCl) application on the yield, quality, and nutrient status of irrigated potato (Solanum tuberosum ‘Russet Burbank’) in southern Manitoba. Preplant application of KCl increased total and marketable yield at one site, and tended (0.05<P ≤ 0.10) to increase total and marketable yield at three additional sites. At three of the four K-responsive sites, soil test K levels were <200 mg NH4OAc-extractable K kg−1, the level below which K fertilizer is recommended based on existing guidelines. Effects of timing of KCl application on total and marketable yield were limited although, averaged across sites, KCl applied at hilling reduced the yield of small tubers (<85 g) and increased the proportion of larger tubers (170 to 340 g) compared with preplant application. Averaged across sites, KCl applied preplant or at hilling reduced specific gravity compared with the 0 KCl treatments. Improvements in fry colour with KCl application were evident at only one site. Petiole and tuber K and Cl− concentration, K and Cl− removal in harvested tubers, and post-harvest soil test K concentration increased with KCl application. However, petiole K concentration measured 82 to 85 d after planting predicted only 24% of the variability in relative marketable yield for sites containing between 164 and 632 mg NH4OAc-extractable K kg−1 to 15 cm. Results demonstrate the potential for yield increases and specific gravity declines with KCl application under Manitoba conditions, but suggest that further research will be required to better predict the potential for yield responses using soil and petiole testing.

NITRATE-NITROGEN RATES IN PETIOLE SAP OF POTATO CROP (SOLANUM TUBEROSUM L.)

2009 ◽  
pp. 333-338 ◽  
Author(s):  
A. Majić ◽  
M. Poljak ◽  
A. Sabljo ◽  
E. Sefo ◽  
Z. Knezović
Keyword(s):  
Solanum Tuberosum ◽  
Nitrate Nitrogen ◽  
Solanum Tuberosum L ◽  
Potato Crop ◽  
Nitrogen Rates ◽  
Petiole Sap
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