Relationships between ground cover, intercepted solar radiation, leaf area index and infrared reflectance of potato crops

Haverkort, A. J.; Uenk, D.; Veroude, H.; Waart, M. van de

doi:10.1007/bf02358105

Cited by 87 publications

(52 citation statements)

References 9 publications

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“…Data recording on physiological parameters was carried out during flowering in five sample plants in each plot for the leaf chlorophyll content using a SPAD meter (Konica Minolta, Japan), leaf gas exchange (photosynthesis, stomatal conductance, leaf transpiration rate using an ADC LCA-4 (ADC BioScientific Ltd, England) and specific leaf area (SLA) following the procedures by Garnier et al (2001). Canopy cover by the crop was assessed based on the measurement in a 1 m 2 grid following the procedure by Haverkort et al (1991).…”

Section: Crop Physiological Parametersmentioning

confidence: 99%

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Bhattarai

Dhungel

Midmore

2010

JAS

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Lack of oxygen due to sustained wetting fronts associated with drip and subsurface drip irrigated crops in heavy clay soil can negatively impacts on yield, fruit quality and water use efficiency of cucurbit crops. This study evaluated the effects of aerated irrigation water (oxygation) with subsurface drip irrigation, employing an in-line air injector (Mazzei venturi to introduce 12% air by volume of water) on fruit yield, quality and water use efficiency of watermelon (Citrullus vulgaris) and pumpkin (Cucurbita maxima) in a heavy clay soil. The fruit yield with oxygation increased from 14.5 t ha -1 to 24.6 t ha -1 , and 26.3 t ha -1 to 28.9 t ha -1 , for watermelon and pumpkin, respectively. The total soluble solids (TSS) increased by 19% with oxygation (13.2 vs. 11.1%), and internal fruit crack decreased for watermelon, whereas in pumpkin fruit dry matter increased by 4% (40 vs. 38.4%) and TSS by 7% (13.7 vs. 12.8%). Season long water use efficiency was greater with oxygation compared to the control in both crops. The higher yield with oxygation was associated with a more rapid canopy cover, more leaf chlorophyll, and an increase in leaf photosynthetic rate, and leaf transpiration and an increase in fruit number and size. The results suggested that oxygation can ameliorate temporal hypoxia-associated with drip irrigated cucurbit crops in heavy clay soil and also offer yield and fruit quality benefits.

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Section: Crop Physiological Parametersmentioning

confidence: 99%

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Bhattarai

Dhungel

Midmore

2010

JAS

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“…With increasing urbanization, the potato is not only being used as a fresh tuber but also in processed products such as French fries and crisps (Abebe et al, 2013;Haverkort et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Response of Applied Phosphorus Fertilizer Rate and Plant Spacing for Potato (Solanum tuberosum L.) Production on Nitisols in Central Highland of Ethiopia

Chala¹,

Chindi²,

Zeleke³

2017

GJAS

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The use of low phosphorus fertilize rate as well as inappropriate plant spacing are one of the main factors constraining potato production in Ethiopia. Therefore, a field experiment was conducted during the 2015 and 2016 main growing season in Welmera and Ada'a Berga district in the central highland of Ethiopia. The experiment was aimed at determining the effect of phosphorus fertilizer rates and plant spacing on yield and yield components of potato. The treatments consisted of five phosphorus fertilizer rate and four levels of plant spacing (65 cm x 30 cm, 75 cm x 30 cm, 85 cm x 30 cm and 95 cm x 30 cm). The experiment was laid out as a randomized complete block design in a factorial arrangement and replicated three times. Analysis of the results revealed that phosphorus fertilizer and plant spacing significantly affected leaf area index, marketable tuber number, total tuber numbers, total yields, specific gravity and tuber dry matter. However, days to follower and days to maturity significantly affected by phosphorus fertilizer but did not affect by plant spacing. Increasing or widening plant spacing significantly reduced total as well as unmarketable tuber yields whereas decreasing or narrowing it significantly increased this yield parameter. On the other hand, increasing plant spacing significantly increased marketable tuber yields. In conclusion, the phosphorus fertilizer and plant spacing produced the highest tuber yields (ton ha -1 ) as well as marketable tuber yield in response to planting at phosphorus fertilizer in the form of P2O5 115kg ha -1 and spacing of 85 cm between rows and 30 cm between plants for Belete variety was advisably.

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“…These traits had a strong positive correlation with NUE and with each other under both N conditions. The colocalization of yield and canopy traits is in line with Haverkort et al (1991) and Vos (2009) who reported a strong correlation of canopy cover with intercepted photosynthetically active radiation and tuber yield. The strong positive association of traits with NUE and co-localization in the same QTL region make the traits interesting for breeders to consider them as a selection criterion to improve NUE in the potato breeding programs.…”

Section: Qtl Identificationsupporting

confidence: 88%

Genetic diversity of potato for nitrogen use efficiency under low input conditions in Ethiopia

Getahun¹

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Relationships between ground cover, intercepted solar radiation, leaf area index and infrared reflectance of potato crops

Cited by 87 publications

References 9 publications

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Oxygation Improves Yield and Quality and Minimizes Internal Fruit Crack of Cucurbits on a Heavy Clay Soil in the Semi-arid Tropics

Response of Applied Phosphorus Fertilizer Rate and Plant Spacing for Potato (Solanum tuberosum L.) Production on Nitisols in Central Highland of Ethiopia

Genetic diversity of potato for nitrogen use efficiency under low input conditions in Ethiopia

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