The position in the canopy and the bearing status of 1-year-old shoots affect the bearing potential and morphology of current-year shoots in walnuts (Juglans regia L.) cv. Chandler

Valdebenito, Daniela; Farias, Daniela da Hora; Lampinen, Bruce; Tixier, Aude; Zwieniecki, Maciej A.; Saa, Sebastián

doi:10.1007/s00468-018-1708-x

Cited by 5 publications

(4 citation statements)

References 49 publications

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“…The demand for potassium and magnesium in fruits was large, and the demand rate was relatively fast. Only relying on external absorption was insufficient to provide the potassium needed for fruit growth in a timely manner, so it would be rational to provide sufficient potassium and magnesium from shoots to meet the needs of its own fruit growth and development, which are consistent with results in the study of oil-tea Camellia tree and apple [36,37]. In summary, these results show that both the new biomass and nutrient accumulation in citrus have decisive effects on citrus yield productions.…”

Section: Distribution Of Nutrient Differences Between Fruit and New Ssupporting

confidence: 82%

“…In the previous peach studies [35], the leaf-fruit ratio showed a significant relationship with the dry weight of the fruit. In addition, in the walnut trees, the number of branches retained in trees had a significant impact on the dry weight and yield of the fruit [36]. This implies that all the photosynthetic products in fruit trees are able to flow to the branches with reproductive organs.…”

Section: Distribution Of Nutrient Differences Between Fruit and New Smentioning

confidence: 99%

“…Because the development of new shoots plays a central role in the complex interaction that determines the nutritional and reproductive growth of woody plants [38], the new shoots of the fruiting tree mainly develop from the top of the branch, and the reproductive behavior strongly influences the number and type of new branches [39]. Researchers have found that the fruit weight in walnut trees is positively correlated with the length and diameter of the annual branch, the diameter of the current branch and the number of nuts in the current branch [36]. Furthermore, the fruit load and morphological characteristics of new shoots have had a certain impact on the potential yield of the current and subsequent seasons in previous research on pears [40], citrus [41] and litchi [42].…”

Section: Nutrient Composition Of New Shoots Has Important Contributiomentioning

confidence: 99%

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Fruit Yields Depend on Biomass and Nutrient Accumulations in New Shoots of Citrus Trees

et al. 2020

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New shoots (including newly formed leaves and twigs) and fruits of citrus tree are key organs for present yield formation and flower differentiation in the next season, but the relationship between yield fluctuation and accumulations of major nutrients in new shoots and fruits of citrus tree is still unclear. Thus, to quantify the biomass and mineral nutrient accumulation in new shoots and fruits of citrus trees under varied yield levels has essential significance for rational fertilization and pruning management for citrus orchards. The purpose of this study was, therefore, to investigate the accumulation of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg), and the distribution of biomass in new shoots and fruits of citrus trees under low, medium and high-yield levels in each of eight orchards located in Chongqing, China. The results showed that substantial variation of fruit yield was observed in all eight orchards with an average yield of 15.0 (low), 30.9 (medium) and 60.1 (high) kg/plant. The averaged biomass of new shoots ranged from 1.59 to 2.51 kg/plant, which was significantly and positively correlated with fruit yield. Nutrient accumulation in leaves was generally highest among new organs, while more than half of N (52.70–71.4%), P (66.5–80.4%) and K (68.9–85.9%) accumulated in fruit. Fruit yields closely correlated with total amounts of major nutrients in new shoots. Furthermore, the nutrient requirements per unit of newly developed shoots and fruits were gradually decreased with increased yield, but the removed nutrients per ton of fresh fruit were almost stable, indicating that more nutrients were distributed into fruit tissues. Taken together, these findings are valuable for optimizing nutrient and pruning management in citrus orchards in China and other similar countries.

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Section: Distribution Of Nutrient Differences Between Fruit and New Ssupporting

confidence: 82%

Section: Distribution Of Nutrient Differences Between Fruit and New Smentioning

confidence: 99%

Section: Nutrient Composition Of New Shoots Has Important Contributiomentioning

confidence: 99%

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Fruit Yields Depend on Biomass and Nutrient Accumulations in New Shoots of Citrus Trees

et al. 2020

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“…This parameter was used as a tool for productivity screening of various plants (White and Montes, 2005) or as an ecological performance index (Diaz et al, 2004). SLW has an interesting behavior (Valdebenito et al, 2018) and it used in canopy photosynthesis, dry matter accumulation and plant growth studies (Amanullah, 2015).…”

Section: Nsi Opt − N = MDmentioning

confidence: 99%

A method for estimating nitrogen supply index in crop plants: case study on wheat

Datcu¹,

Ianovici²,

Sala³

2020

JCEA

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This paper aim was to adapt a physiological parameter which reflects plant growth and productivity for wheat plants in relation with the applied nitrogen dose. This index can be used for various plants due to the fact that can be easy calculated and gives information about the status and requirements of diverse crops. Nitrogen is the most widely used chemical fertilizer and the adjustment of the dose is really important for farmers, who are searching for an optimum cost-benefit ratio. For this study, five experimental N doses were utilized, between 0 and 200 kg/ha. Experimental field was located within Didactic Station of BUASMV Timisoara, Romania. Nitrogen supply index was determined for healthy leaves and mathematical models were developed. The optimum N amount used for this study was 119 kg/ha and the analysis of differences reflected the modifications for doses ranging between 0 and 200 kg/ha.

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A network of shoots: effects of ontogeny and light availability on growth units in Chandler walnuts

Valdebenito

Laca

Fernández

et al. 2019

Trees

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The position in the canopy and the bearing status of 1-year-old shoots affect the bearing potential and morphology of current-year shoots in walnuts (Juglans regia L.) cv. Chandler

Cited by 5 publications

References 49 publications

Fruit Yields Depend on Biomass and Nutrient Accumulations in New Shoots of Citrus Trees

Fruit Yields Depend on Biomass and Nutrient Accumulations in New Shoots of Citrus Trees

A method for estimating nitrogen supply index in crop plants: case study on wheat

A network of shoots: effects of ontogeny and light availability on growth units in Chandler walnuts

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