Physiological response of potted sunflower (Helianthus annuus L.) to precision irrigation and fertilizer

Li, Zongyan; Fontanier, Charles; Dunn, Bruce L.

doi:10.1016/j.scienta.2020.109417

Cited by 11 publications

(8 citation statements)

References 24 publications

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“…Plant root systems are highly plastic in development and can adapt their architecture, morphology and function in response to the prevailing environmental conditions (Cornish, 2009;Li et al, 2020). One important influencing parameter is the availability of soil P, with P being highly immobile (a diffusion coefficient of 10 -12 to 10 -15 m 2 s -1 ) (Schachtman et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Deep banding of phosphorus and nitrogen enhances Rosa multiflora growth and nutrient accumulation by improving root spatial distribution

Sun

Tian

et al. 2021

Scientia Horticulturae

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Section: Introductionmentioning

confidence: 99%

Deep banding of phosphorus and nitrogen enhances Rosa multiflora growth and nutrient accumulation by improving root spatial distribution

Sun

Tian

et al. 2021

Scientia Horticulturae

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“…The high amounts of polyunsaturated fats, polyphenols, and vitamin E in sunflower oil makes it an ideal choice for human consumption. Likewise, it has a significant value to the ornamental industry, as it is commonly used for cut flowers and potted plants (Li, Fontanier, & Dunn, 2020). Sunflower also has become a popular component of flower beds in many home gardens and floral parks in tropical countries.…”

Section: Introductionmentioning

confidence: 99%

Possible role of nonenzymatic antioxidants in hydroprimed sunflower seeds under heat stress

et al. 2020

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This work demonstrates how priming durations affect high-and low-vigor sunflower (Helianthus annuus L.) seeds and relate to the dynamics of enzymatic and nonenzymatic antioxidant systems against heat stress. Heat tolerance of high-vigor seeds were enhanced when primed 3-6 h, and low-vigor seeds were enhanced when primed 3-12 h. Priming at optimum duration led to increases in ascorbate peroxidase (APX) activity and higher levels of total phenolic content (TPC), vitamin C and total chlorophyll combined with decreased H 2 O 2 content. After exposure to heat stress, the primed seeds maintained reactive oxygen species (ROS) levels and alleviated seeds damage. This may be due to protective mechanisms of priming that prevented severe loss in catalase (CAT) and APX activities, maintained superoxide dismutase (SOD) activity, and increased TPC, proline, vitamin C, and carotenoid accumulation. However, extending priming to 18 h with subsequent heat stress decreased germination percentage. Control seeds lost viability, as oxidative balance was not maintained due to heat stress. These results support the participation of nonenzymatic antioxidants in the improved tolerance to heat stress of primed seeds.

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“…Peduncle length was not affected by irrigation rate. Li et al [19] reported irrigation and fertilizer rate had no significant impact in plant height of Helianthus annuus L. 'Choco Sun' at the flowering stage (55 days after transplanting); however, there was a significant interactive effect at 25 and 45 days after transplanting. At 25 and 45 days after transplanting, there was no fertilizer rate effect for WW plants but there was a fertilizer rate effect under drier conditions.…”

Section: Vegetative Growthmentioning

confidence: 99%

“…The effect of irrigation volume on shoot growth has been variable. Li et al [19] found that irrigation had a significant effect on stem dry mass of H. annuus, whereas fertilizer rate had no effect.…”

Section: Vegetative Growthmentioning

confidence: 99%

Fertilizer Rate and Substrate Water Content Effect on Growth and Flowering of Beardtongue

Bayer

2020

Horticulturae

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Research has shown that reduced irrigation and fertilizer rates can still produce good plant growth when irrigation is applied efficiently to reduce leaching. The impact of reduced irrigation and fertilizer rate on flowering and plant growth would provide additional information on the potential for reduced production inputs. The objective of this research was to quantify the impact of reduced irrigation and fertilizer rate on growth and flowering of Ruby Candle beardtongue (Penstemon × ‘Ruby Candle’). A soil moisture sensor automated irrigation system was used to maintain plants at 40% volumetric water content [VWC; well-watered (WW)] or 18% VWC (reduced irrigation, RI). A controlled release fertilizer was applied at 100%, 50%, and 25% of the bag rate (12 g/plant). There was not a significant treatment effect on any flower parameter. Average plant height was greatest for plants receiving the 50% fertilizer rate (75.9 cm) and was lowest for the 100% fertilizer rate (64.5 cm). Internode length was greater for WW plants (36.9 mm) than RI plants (32.4 mm). Well-watered plants had greater fresh weight (99.1 g) than RI plants (79.2 g) and 100% fertilizer rate (97.1 g) was greater than the 25% fertilizer rate (82.7 g).

show abstract

Physiological response of potted sunflower (Helianthus annuus L.) to precision irrigation and fertilizer

Cited by 11 publications

References 24 publications

Deep banding of phosphorus and nitrogen enhances Rosa multiflora growth and nutrient accumulation by improving root spatial distribution

Deep banding of phosphorus and nitrogen enhances Rosa multiflora growth and nutrient accumulation by improving root spatial distribution

Possible role of nonenzymatic antioxidants in hydroprimed sunflower seeds under heat stress

Fertilizer Rate and Substrate Water Content Effect on Growth and Flowering of Beardtongue

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