Nondestructive determination of nitrogen and chlorophyll content in olive tree leaves and the relation with photosynthesis and fluorescence parameters

Boussadia, Olfa; Steppe, Kathy; Zgallaï, H; Hadj, Salem Ben El; Braham, Mohamed; Lemeur, Raoul; Labeke, Marie-Christine Van

doi:10.1007/s11099-011-0019-x

Cited by 16 publications

(10 citation statements)

References 15 publications

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“…Work with vines grown with restricted N also showed reduced P n (Cheng et al, 2004;Schreiner et al, 2013). Grass likely had reduced P n due to the reduced leaf blade N which is an important factor in photoassimilation (Boussadia et al, 2011).…”

Section: Discussionmentioning

confidence: 94%

Vineyard Floor Management Influences ‘Pinot noir’ Vine Growth and Productivity More than Cluster Thinning

Reeve¹,

Skinkis²,

Vance³

et al. 2016

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Vigor and crop level management are important practices for premium wine grape production. The implications of crop thinning ‘Pinot noir’(Vitis vinifera L.) vines of varying vigor were investigated in the Willamette Valley of Oregon in 2011 to 2013 to better understand the relationship between canopy size and yield within the framework of a cool-climate, premium production wine grape vineyard. To manipulate vigor, a competitive grass cover crop (Festuca rubra L.) was grown in both (Grass), alternating (Alternate), or neither side of the flanking alleyways (Tilled). Vines within each vineyard floor treatment had two crop levels applied, including cluster thinning to one cluster per shoot (Half Crop) or no crop thinning (Full Crop). Grass treatment had reduced leaf area and leaf nitrogen (N) concentrations during all years compared with Tilled treatments. Leaf photosynthesis was also lower in Grass treatments despite more light in the canopy interior. Grass treatments had lower yield than Tilled treatments in 2 of 3 years and lower yeast assimilable nitrogen (YAN) concentrations in fruit every year. There was limited impact of floor treatments on total soluble solids (TSS) and pH. Reduced yields through cluster thinning had limited impact on vegetative growth but increased TSS and pH, in 2 of 3 years. There were few floor management by crop level interactions in any year. Grass effectively reduced vegetative growth to moderate vigor levels with cane weights between 20 and 40 g. Using a competitive grass cover crop may be an effective strategy to reduce excessive vine growth and require less labor in canopy management and crop thinning without compromising basic fruit ripeness, although YAN levels need to be monitored.

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Section: Discussionmentioning

confidence: 94%

Vineyard Floor Management Influences ‘Pinot noir’ Vine Growth and Productivity More than Cluster Thinning

Reeve¹,

Skinkis²,

Vance³

et al. 2016

horts

View full text Add to dashboard Cite

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“…Several factors may limit photosynthesis or influence the partition of photoassimilates in the leaves to the tubers (Robredo et al, 2011). One of such factors is the nitrogen stress (Boussadia et al, 2011;Jin et al, 2015.). Besides wheat crop, starch and soluble sugars can accumulate in rice plants (Hirano et al, 2005;Wang et al, 2006) and in grapes (Vitis labrusca L.) (Chen & Cheng, 2003) with low N supply.…”

Section: Introductionmentioning

confidence: 99%

Carbohydrates Concentration in leaves of potato plants affected by nitrogen fertilization rates

et al. 2016

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At poor conditions of nitrogen (N) in the soil, potato plants may accumulate starch in leaves and be indicative of N nutritional stress. The objective of this work was to determine the effects of N rates (0, 50, 100, 200 and 300 kg ha-1 of N) on the concentrations of carbohydrates (total soluble sugars-TSS, reducing sugars-RS, non-reducing sugars-NRS and starch) in the fourth leaf (FL) of two potato cultivars (Asterix and Atlantic) and their critical levels (CL) associated to the N fertilization rate necessary to obtain the maximum physical (MPE) and economic (MEE) efficiency of tubers. A randomized block design with four replications was used in both experiments. On day 21 after plant emergence, four FL were collected from four plants. Potatoes plants fertilized with low rates of N accumulated less TSS in leaves than those properly fertilized. The opposite occurred with content of starch. The cultivars showed similar responses to five doses of N in relation to contents of starch and TSS. However, the response to the increase in doses of N for RS, NRS and Starch/NRS is cultivar-specific. The correlations between contents of RS, NRS and Starch/NRS with the starch and TSS were dependent on the potato cultivar.

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“…This occurs because a nutrient in abnormal levels may impair the development of the plant, causing a nutritional stress. Nitrogen is responsible for the growth and development of plants, and consequently to an increase in yield, and it is present in molecules and proteins of chlorophyll and is directly associated with the photosynthetic activity and the rate of translocation of assimilates (Boussadia et al, 2011, Santos et al 2016. Analyzing together the variables related Santos et al (2013).…”

Section: Resultsmentioning

confidence: 99%

October 2019

2019

Aust J Crop Sci

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The objective of this research was to evaluate the efficiency of different sources of residues in the composition of organomineral fertilizers on common bean yield. The experiment was carried out in a greenhouse at the Federal University of Uberlândia. A randomized complete block design was used in the 2 x 4 + 2 factorial scheme corresponding to two organic sources (biosolids and filter cake) and four doses of pelletized organomineral fertilizer (50, 75, 100 and 125% of the recommendation for common bean, plus two additional treatments without fertilization and fertilization with mineral fertilizer). The plant height and stem diameter were evaluated at 30 days after sowing (DAS), and an average number of pods plant-1 and grains pod-1 , yield (g plant-1), dry mass (g), and mass of 1000 grains (g) at 84 DAS. The organomineral fertilizer based on biosolids fertilizer provides the largest growth with the use of 100% of the recommended dose, the largest volume of dry mass up to 75% and the highest yield at 50%. The organomineral fertilizer based on filter cake increased dry mass volume. The organomineral fertilizers evaluated have the potential to substitute exclusively mineral fertilization in the common bean crop.

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Nondestructive determination of nitrogen and chlorophyll content in olive tree leaves and the relation with photosynthesis and fluorescence parameters

Cited by 16 publications

References 15 publications

Vineyard Floor Management Influences ‘Pinot noir’ Vine Growth and Productivity More than Cluster Thinning

Vineyard Floor Management Influences ‘Pinot noir’ Vine Growth and Productivity More than Cluster Thinning

Carbohydrates Concentration in leaves of potato plants affected by nitrogen fertilization rates

October 2019

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