Responses of Foliar Nutrient Status and Stoichiometry to Nitrogen Addition in Different Ecosystems: A Meta‐analysis

2020 ◽  
Vol 125 (2) ◽  
Author(s):  
Jinhua Mao ◽  
Qinggong Mao ◽  
Mianhai Zheng ◽  
Jiangming Mo
Keyword(s):  
Meta Analysis ◽  
Nutrient Status ◽  
Nitrogen Addition ◽  
Foliar Nutrient

Global response patterns of plant photosynthesis to nitrogen addition: A meta‐analysis

2020 ◽  
Vol 26 (6) ◽  
pp. 3585-3600 ◽  
Author(s):  
Xingyun Liang ◽  
Tong Zhang ◽  
Xiankai Lu ◽  
David S. Ellsworth ◽  
Hormoz BassiriRad ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Nitrogen Addition ◽  
Response Patterns ◽  
Global Response ◽  
Plant Photosynthesis

Foliar nutrient status of field grown tissue cultured and budded Apple trees

1988 ◽  
Vol 11 (12) ◽  
pp. 1649-1662 ◽  
Author(s):  
R. F. Korcak ◽  
R. H. Zimmerman ◽  
S. S. Miller
Keyword(s):  
Nutrient Status ◽  
Apple Trees ◽  
Foliar Nutrient

Sclerophylly and Foliar Nutrient Status of Mediterranean-Climate Plant Communities in Southern Australia

1990 ◽  
Vol 38 (5) ◽  
pp. 459 ◽  
Author(s):  
RL Specht ◽  
PW Rundel
Keyword(s):  
Plant Communities ◽  
Crude Protein ◽  
Mediterranean Climate ◽  
Phosphorus Content ◽  
Specific Area ◽  
Dry Weight ◽  
Nutrient Status ◽  
Foliar Phosphorus ◽  
Foliar Nutrient ◽  
Leaf Specific Area

An increase (percentage dry weight) in both lignin and cellulose (with a greater proportion of cellulose than lignin being formed) is associated with a decrease in the concentration of phosphorus (and of other related elements) per unit dry weight in the leaves of sunlit overstorey species, of both sclerophyll and savannah communities in the mediterranean climate of southern Australia. Simultaneously, crude protein decreases. Leaves become increasingly sclerophyllous (with a higher Sclerophyll Index), with lower crude protein (cytoplasm) per unit dry weight; thicker leaves with lower leaf specific area result. The degree of sclerophylly per unit foliar phosphorus content is a little higher in understorey species which are partially shaded by the overstorey canopy.

The influence of mountain alder on the growth, nutrition, and survival of black spruce and Sitka spruce in an afforested heathland near Mobile, Newfoundland

1993 ◽  
Vol 23 (4) ◽  
pp. 743-748 ◽  
Author(s):  
André J. Hudson
Keyword(s):  
Black Spruce ◽  
Nutrient Status ◽  
Sitka Spruce ◽  
Nutrient Concentrations ◽  
Litter Fall ◽  
Humus Layer ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
Ecological Basis ◽  
Alder Leaf Litter

The natural invasion of mountain alder (Alnuscrispa (Ait.) Pursh) into monoculture plantations of black spruce (Piceamariana (Mill.) B.S.P.) and Sitka spruce (Piceasitchensis (Bong.) Carr.) afforded an opportunity to assess the effects of mountain alder on soils, and on the growth, nutrient status, and survival of spruce in eastern Newfoundland. The plantations were established on ploughed Kalmia–Vaccinium heath in 1968–1969. Significant increases in the growth of spruce were associated with the presence of high densities of mountain alder in the two plantations studied. The increases began 3–6 years after the invasion and establishment of mountain alder. Estimated nitrogen (N) contributions to each plantation from mountain alder leaf litter fall were approximately 50 kg•ha−1•year−1. Spruce foliage N content was 10–15% higher in high-density mountain alder (HD-alder) plots than in low-density mountain alder (LD-alder) plots, but other foliar nutrient concentrations were low and possibly deficient in the HD-alder plots. Development of a litter fall–humus layer was observed in HD-alder plots but not in LD-alder plots; however, B-horizon soil-N values did not differ significantly between HD-alder and LD-alder plots. The mountain alder invasion did not reduce the densities (stems/ha) of spruce. Additional studies on the autecology of Alnus spp. native to Newfoundland, and on alder-spruce interaction are recommended to further the development of an adequate ecological basis for heathland and peatland afforestation in the region.

scholarly journals Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Chengming You ◽  
Fuzhong Wu ◽  
Youmin Gan ◽  
Wanqin Yang ◽  
Zhongmin Hu ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Nitrogen Addition ◽  
Grassland Ecosystems

Foliar deficiencies of sugar maple stands associated with soil cation imbalances in the Quebec Appalachians

1995 ◽  
Vol 75 (2) ◽  
pp. 169-175 ◽  
Author(s):  
Rock Ouimet ◽  
Claude Camiré
Keyword(s):  
Soil Properties ◽  
Acer Saccharum ◽  
Sugar Maple ◽  
Nutrient Status ◽  
Nutrient Stress ◽  
Exchangeable Cations ◽  
Integrated System ◽  
Ca Deficiency ◽  
Exchangeable Ca ◽  
Foliar Nutrient

Widespread symptoms of foliar deficiency of P and K have been observed for almost a decade in most of the declining hardwood forest in the Quebec Appalachians. We hypothesized that the foliar nutrient disturbances were related to the chemical equilibrium of exchangeable soil cations. Mature sugar maple (Acer saccharum Marsh.) foliage, and soil H-Ah and B horizon from 246 hardwood stands located in the Quebec Appalachians were sampled and analyzed. A cluster analysis using the Diagnosis and Recommendation Integrated System (DRIS) indices of the foliar data permitted the identification of six different nutritional groups: one slightly and one strongly deficient group in P-K, three groups having a K-Ca deficiency at different intensities from weak to strong, and one group having a strong P-K-Ca deficiency. These foliar nutrient status were strongly related to some soil properties. The P-K deficient groups had a 30% lower K saturation in the H-Ah horizon than the average level of the other groups, but a higher proportion of exchangeable Ca in the H-Ah and B horizon. For the four groups that were K-Ca deficient, increased nutrient stress was associated with reductions in soil Ca saturation and pH, and, particularly, increases in soil Mg saturation. Also, the Ca/(H+Al) ratio of exchangeable cations in the B horizon was ≤ 0.6 for these groups. High soil Mg saturation, potential soil Al toxicity related to low Ca saturation, and unfavorable soil humus properties were associated with the severity of nutrient stress. To obtain a balanced nutrition for sugar maple in this region, the forest humus should have less than 10% of Mg on exchange sites, a Ca/Mg ratio of exchangeable cations > 6, and a K/Mg ratio > 0.5. The values in the mineral B horizon should be < 10% for Mg/CEC, > 4 for the Ca/Mg ratio, > 1 for the K/Mg ratio, and > 1 for the Ca/(H+Al) ratio. Key words:Acer saccharum, cation saturation, Diagnosis and Recommendation Integrated System, forest decline, nutrient status, soil properties

Seasonal growth and foliar nutrients of Larix laricina in three wetland ecosystems

1977 ◽  
Vol 55 (10) ◽  
pp. 1291-1298 ◽  
Author(s):  
Donald L. Tilton
Keyword(s):  
Nutrient Status ◽  
Shoot Elongation ◽  
Nutrient Concentrations ◽  
Larix Laricina ◽  
Wetland Ecosystems ◽  
Site Variation ◽  
Foliar Nutrient ◽  
Ash Weight ◽  
Conifer Swamp ◽  
Study Sites

Levels of N, P, Ca, Mg, K, Al, Fe, Zn, Mn, and B were determined in foliage from tamarack (Larix laricina (DuRoi) K. Koch) in a bog, conifer swamp, and fen from budbreak to leaf abscission. Elongation of needles and lateral shoots as well as dry and ash weight of needles were determined. Expansion of needles and shoots ceased at similar dates for all sites, but trees in the fen had significantly longer needles and lateral shoots.On August 13, foliar concentrations of N, Ca,and Mg were higher in the fen than in the conifer swamp or bog, while concentrations of Al, Fe, Zn, Mn, and B were higher in the bog than the other two sites. Phosphorus concentrations in foliage were similar on this date in the fen and conifer swamp but were lower in the bog site. Despite significant between-site variation for certain foliar elements, two patterns of seasonal variation in nutrient concentrations were discerned. Significant between-site differences in the amounts and rates of needle and shoot elongation, foliar nutrient concentrations at a single sampling time, and patterns of certain foliar elements were associated with variations in nutrient status and moisture–aeration conditions of the study sites.

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