Mg Deficiency — A “New” Phenomenon in Declining Forests—Symptoms and Effects, Causes, Recuperation

Huettl, R. F.

doi:10.1007/978-3-642-76995-5_7

Cited by 20 publications

(8 citation statements)

References 32 publications

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“…Magnesium is constantly maintained at optimum levels, in accordance with other observations of this element on limestone soils [2], whereas on acid soils there are often incidences of chlorosis due to magnesium deficiency [18]. Potassium concentrations are close to ideal levels in c needles, but they decrease considerably in older needles.…”

Section: Introductionsupporting

confidence: 82%

The decline of a Pinus nigra Arn. reforestation stand on a limestone substrate: the role of nutritional factors examined by means of foliar diagnosis

1998

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Section: Introductionsupporting

confidence: 82%

The decline of a Pinus nigra Arn. reforestation stand on a limestone substrate: the role of nutritional factors examined by means of foliar diagnosis

1998

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“…reported that foliar deficiency of K and Ca was partly related to higher saturation in acidity in the soil B horizon of sugar maple stands' However, Mg did not reach the critical value (1.2 g kg-t) in the present study, probably because K and Ca were the more limiting nutrients for plant growth, as suggested by their greater correlation with plant DM mass. Magnesium deficiency has been diagnosed in forests with soils having very low pool sizes of Mg (Bernier and Brazeau 1988;Huettl 1993b). We observed that endomycorrhization of sugar maple plants did not influence shoot growth but only dry root mass. Schultz et al (1981) obtained similar results for the lowest fertllizer rate applied, except that the authors reported an increase in root DM mass, rather than a reduction.…”

mentioning

confidence: 69%

Effect of soil base saturation and endomycorrhization on growth and nutrient status of sugar maple seedlings

Ouimet¹,

Camiré²,

Furlan³

1996

Can. J. Soil. Sci.

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Nutrient imbalances of declining sugar maple (Acer saccharum Marsh.) stands in southeastern Quebec have been associated partly with high soil exchangeable acidity and low base saturation on. A greenhouse experiment was set up to determine how growth and nutrient status of sugar maple seedlings can be influenced by soil acidification and the presence of an endomycorrhizal fungus. The experiment consisted of five levels of soil base saturation (from 12 to 50%) and two levels of soil inoculation by an endomycorrhizal fungus (inoculated and control) in a complete factorial arrangement Sugar maple seedlings were grown for 3 mo in the treated soil substrates. Seedling shoot elongation rate, growth [dry matter (TDM) mass, stem diameter, and total leaf area], and K, Ca and Mg concentrations in foliage and roots decreased with soil acidification with base saturation used as an indicator of the soil-acidification status. Foliar K and Ca level reached values below critical thresholds when soil base saturation was reduced to 12%. Under the experimental conditions, seedling growth was not significantly affected by endomycorrhization, except for root DM mass, which was reduced by 24% compared with the control treatment. For mycorrhizal seedlings, foliar Al concentration increased linearly from 113 mg kg−1 to 210 mg kg−1 with the reduction of soil base saturation from 50% to 12%, while, for non-mycorrhizal seedlings, foliar Al concentration remained at a high level (195 mg kg−1) independently of the soil acidification level. Sugar maple seedling growth was not related to accumulation of Al in foliage. The results of this experiment support the hypothesis that a causal relationship exists between the level of soil base saturation and the growth decrease and associated nutrient disorders observed in declining sugar maple stands in Quebec. Key words:Acer saccharum, nutrient status, seedling growth, soil base saturation, endomycorrhizae

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“…Next, the excess of Zn and most frequently the deficiency of Fe in plants hamper the photosynthesis process, which strongly disturbs plant growth [13][14]. The assessment of the degree of Scots pine (Pinus sylvestris) needles contamination by Zn was carried out on two species, i.e., tolerant (T) and sensitive (S).…”

Section: Impact Of Zn On Mg and Fe Concentrations In Scots Pine Needlesmentioning

confidence: 99%

“…The advantage of conifers as evergreen species is that, in contrast to deciduous trees, they can accumulate atmospheric pollutants over several years. The intensity of these stressors are reflected by the chemical composition of the needles [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Biogeochemical Assessment of a Zn-Contaminated Site Using Scots Pine (Pinus sylvestris L.) Needles as Phytoindicators

Diatta¹,

Andrzejewska²,

Chudzińska³

et al. 2016

Pol. J. Environ. Stud.

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The aim of our study was to evaluate the mobility of Zn in soils subjected to the activity of a zinc smelter and to assess the contamination of 1-and 2-year-old needles of Scots pine species sensitive to and tolerant of heavy metal contamination, particularly zinc. The trees were selected on the basis of their morphology, i.e., tolerant ones exhibited quite normal growth shape, but sensitive ones were more or less dwarves. Mineralogical composition revealed the prevalence of kaolinite in all soils except for two samples, where smectite dominated. Zinc contamination exceeded 30 times the geochemical background, and the reactive Zn forms represented 34.6% of total Zn content (Zn Total ). Proton generation capacity (α) indices calculated for the bioavailable Zn fraction (Zn Bio ) were 59% higher compared to the reactive Zn pool (Zn Reac ). Two-year-old tolerant (T) pine needles accumulated 21.9, 38.2, and 13.6% more Zn, Fe, and Mg, respectively, as compared to 1-year-old ones. For sensitive (S) needles, the range followed: 12.4, 48.8, and 7.3%, respectively. Iron was considered a "strategic survival element" for both pines growing under high zinc pollution.The transfer of Zn ions from the soil environment to plants still remains the basic source of maintaining its high concentrations in the needles, since air emissions ceased in 1996. The amounts of Zn accumulated by Scots pine at crucial years of metallurgical emissions may be considered as an additional time-constant source due to the evergreen vegetative lifecycle.

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Mg Deficiency — A “New” Phenomenon in Declining Forests—Symptoms and Effects, Causes, Recuperation

Cited by 20 publications

References 32 publications

The decline of a Pinus nigra Arn. reforestation stand on a limestone substrate: the role of nutritional factors examined by means of foliar diagnosis

The decline of a Pinus nigra Arn. reforestation stand on a limestone substrate: the role of nutritional factors examined by means of foliar diagnosis

Effect of soil base saturation and endomycorrhization on growth and nutrient status of sugar maple seedlings

Biogeochemical Assessment of a Zn-Contaminated Site Using Scots Pine (Pinus sylvestris L.) Needles as Phytoindicators

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