Soil chemical properties and nutritional status of trees in pure and mixed-species stands in south Ethiopia

A field experiment was carried out on an Ultisol located at the city of Agudos (22º30'S; 49º03'W), in the state of São Paulo, Brazil, in order to determine the effects of rates and sources of potassium fertilizer on nutritional status of 'Smooth Cayenne' pineapple and on some soil chemical properties. The experiment was a complete factorial design with four rates (0, 175, 350, and 700 kg ha-1 of K2O) and three combinations of K sources (100% KCl, 100% K2SO4 and 40% K2SO4 + 60% KCl). Soil samples were taken from the depths 0-20 cm, 20-40 cm and 40-60 cm at planting and 14 months after. Nutritional status of pineapple plants was assessed by means of tissue analysis. Soil K availability increased with application of K fertilizer, regardless of K sources. Soil chlorine and Cl concentration in pineapple leaves increased with application of KCl or K2SO4+KCl. Plant uptake of potassium was shaped by soil K availability and by the application rates of K fertilizer, independently of K sources.

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Impact of Amino Acids and Humic Substances Application on Some Soil Chemical Properties Along with Nutritional Status and Productivity of Wheat Grown under Saline Conditions

Journal of Soil Sciences and Agricultural Engineering ◽

10.21608/jssae.2017.37490 ◽

2017 ◽

Vol 8 (6) ◽

pp. 231-240

Author(s):

Mona Kenawy

Keyword(s):

Amino Acids ◽

Nutritional Status ◽

Humic Substances ◽

Chemical Properties ◽

Soil Chemical Properties

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Variation in soil and foliar nutrition status along a forest edge–interior gradient in sugar maple forest fragments

Canadian Journal of Forest Research ◽

10.1139/cjfr-2019-0185 ◽

2019 ◽

Vol 49 (11) ◽

pp. 1463-1470

Author(s):

Eva Masson ◽

Alain Cogliastro ◽

Daniel Houle ◽

David Rivest

Keyword(s):

Nutritional Status ◽

Edge Effects ◽

Sugar Maple ◽

Chemical Properties ◽

Forest Edge ◽

Soil Chemical Properties ◽

Total Carbon ◽

Nutrition Status ◽

Foliar Nutrition ◽

Log Ratio

The consequences of forest fragmentation and edge effects on soil nutrient availability and nutrition of sugar maple (Acer saccharum Marsh.) forests remain understudied. We assessed soil chemistry (bulk pH, total carbon (C) and nitrogen (N), extractable phosphorus (P), exchangeable cations, and mineralizable N) and foliar nutrition (N, P, potassium (K), calcium (Ca), and magnesium (Mg)) of mature sugar maple forests along an edge–interior gradient (10, 20, 30, 50, 70, and 120 m from the forest edges) in seven sugar maple forest stands (three on sandstone and four on dolomite bedrock) that are embedded within an agricultural landscape in southern Quebec, Canada. We hypothesized that foliar nutritional imbalances of sugar maple forests would decline along this gradient. Foliar nutrition was analyzed using the diagnosis and recommendation integrated system (DRIS) and the compositional nutrient diagnosis with isometric log-ratio (CND-ilr) method. At the sandstone sites, rates of N mineralization and nitrification increased with increasing distance from the forest edge. Other soil chemical properties and all sugar maple foliar indices of nutritional diagnostics varied weakly along the edge–interior gradient. Assessment of sugar maple forest nutritional status through different nutritional indices revealed K and P deficiencies in all stands that were sampled and at all distances from the forest edge. Overall, we found weak forest-edge effects on soil chemical properties and sugar maple forest nutritional status.

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