Nitrogen Fractions in a Gray Wooded Soil as Influenced by Long-Term Cropping Systems and Fertilizers

Khan, Shahamat U.

doi:10.4141/cjss71-058

Cited by 28 publications

(12 citation statements)

References 10 publications

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“…and to biomass CA.l raaio (r : 0.53x). (Khan 1971;Campbell et al 1986Campbell et al , 1991, or the percentage change in amino acids (Stevenson 1982). Differences in quality of AA due to cultural treaffnents have only been demonstrated on a few occasions (Stevenson 1982; Campbell et al l99lb,Q.…”

Section: Carbon Mineralization and Specificmentioning

confidence: 99%

Effect of crop rotations and rotation phase on characteristics of soil organic matter in a Dark Brown Chernozemic soil

Campbell¹,

Biederbeck²,

Zentner³

et al. 1992

Can. J. Soil. Sci.

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r|irto.. stress depressing associalted cereai production in this semiarid environment. As expected, rotation phase did not influence sJil organic C, but alfalfa under-seeded into barley (Hordeum vulgare L-\ iryrelsed ioil organic nitrogen. We belLve this was due to crop residue inputs from the seedling alfalfa. Microbial biomals C and N, C mineralization, the specific respiratory activity (ratio of CO2-C respired/microbial biomass C) and hydrolyzable amino acids were also greater in the rotation phases in which barley was underseeded wittralfalia. Carbon mineralization and specihc respiratory activity were directly related to estimated crop residue-C returned to soil, but not residue-N. However, both were increased by including alfalfa in the rotation. Carbon mineralization and specific respiratory activity were more sensitive indexes of soil organic matter quality than biomass C and N per se. Hydrolyzable amino acids and amino sugars respondei to the treatments in a manner similar to total soil organic N. Relative molar distribution of amino acids was unaffected by crop rotation or rotation phase. Potentially .mineralizable N in this soil was low compared to other ianadian prairie soils, even though the total soil organic N ofthe Scott soil was relatively high. We concluded that (i) all soil biochemical characteristics studied are useful for assessing soliqua-iity changes; (ii) when studying soil changes, thin (0-to 7.5-cm) soil slices are more likely-to reveal treatmenieffects than thicker slices; (iii) all rotation phases should be analyzed whenever forage legumes are constituents of crop rotations.Key words: C mineralization; microbial biomass, amino acids, N mineralization, specific respiratory activity For personal use only.

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Section: Carbon Mineralization and Specificmentioning

confidence: 99%

Effect of crop rotations and rotation phase on characteristics of soil organic matter in a Dark Brown Chernozemic soil

Campbell¹,

Biederbeck²,

Zentner³

et al. 1992

Can. J. Soil. Sci.

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“…Soil organic N can be divided into different forms according to chemical procedures proposed by Bremner (1965), and the chemical properties of different organic N forms in soil have some relationship with their availability to a crop after mineralizing (Stevenson, 1982a;Wu, 1986;Shen and Shi, 1990;Wang et al, 1991). There have been numerous reports in the literature concerning the effects of fertilization on quantity and composition of organic N forms in the soil (Keeny, 1964;Khan, 1971;Smith and Young, 1975;Stevenson, 1982a, b;Wu, 1986;Wang et al, 1991;Allison, 1997;Zhu, 1997;Liang et al, 2000), but the conclusions were quite contradictory. For instance, some studies showed that different fertilization management could significantly affect the quantity of different organic N forms; however the composition of these N forms was not significantly changed (Smith and Young, 1975;Stevenson, 198213;Wang et al, 1991); other studies showed that not only the quantity but also the composition of organic N forms could be significantly affected by fertilization (Keeny, 1964;Khan, 1971;Liang et aZ., 2000).…”

Section: Introductionmentioning

confidence: 99%

Effect of Long-Term Fertilization on Organic Nitrogen Forms in a Calcareous Alluvial Soil on the North China Plain

Liu

Zhang

et al. 2006

Pedosphere

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In order to illustrate the change of nitrogen (N) supply capacity after long-term application of manure and chemical fertilizer, as well as to properly manage soil fertility through fertilizer application under the soil-climatic conditions of the North China Plain, organic N forms were quantified in the topsoil with different manure and chemical fertilizer treatments in a 15-year fertilizer experiment in a Chinese calcareous alluvial soil. Soil total N (TN) and various organic N forms were significantly influenced by long-term application of chemical fertilizer and manure. TN, total hydrolysable N, acid-insoluble N, amino acid N and ammonium N in the soil increased significantly ( P < 0.05) with increasing manure and fertilizer N rates, but were not influenced by increasing P rates. Also, application of manure or N fertilizer or P fertilizer did not significantly influence either the quantity of amino sugar N or its proportion of TN. Application of manure significantly increased ( P < 0.05) hydrolysable unknown N, but adding N or P did not. In addition, application of manure or N fertilizer or P fertilizer did not significantly influence the proportions of different soil organic N forms.

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“…The higher levels of soil N in the five-year WOBHH rotation are in the forms of hydrolyzable N, amino acids and amino sugars. 15,4 While these forms of N are not directly available to plants, they are easily mineralized into available forms that plants can take up Thus there are greater levels of potentially available N in the WOBHH rotation compared to the WF rotation.…”

Section: Rotation Contributions To Soil Quality: a Long-term Investmentmentioning

confidence: 99%

Growing Season Nitrous Oxide Emissions from a Gray Luvisol as a Function of Long-term Fertilization History and Crop Rotation

2017

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SummaryThe Breton Plots were established by the Department of Soils at the University of Alberta in 1929. Within the Breton Plots research site, numerous long-term plot experiments have been conducted over the years. This paper summarizes results from the Breton Classical Plots (est. 1930), the Breton Hendrigan Plots (est. 1980), the Breton Tillage Straw Nitrogen plots (est. 1979) and the Breton Nitrogen Immobilization Plots (est. 1982). The experiments were established to find suitable cropping rotations and fertilizer management strategies appropriate for the Gray Wooded soils developed on glacial till in the Breton area of Alberta. Long-term results from the plots show that production challenges on these soils can be addressed with proper nutrient (fertilizer, manure) and residue management and the incorporation of perennial legume forage crops into annual crop rotations.

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Nitrogen Fractions in a Gray Wooded Soil as Influenced by Long-Term Cropping Systems and Fertilizers

Cited by 28 publications

References 10 publications

Effect of crop rotations and rotation phase on characteristics of soil organic matter in a Dark Brown Chernozemic soil

Effect of crop rotations and rotation phase on characteristics of soil organic matter in a Dark Brown Chernozemic soil

Effect of Long-Term Fertilization on Organic Nitrogen Forms in a Calcareous Alluvial Soil on the North China Plain

Growing Season Nitrous Oxide Emissions from a Gray Luvisol as a Function of Long-term Fertilization History and Crop Rotation

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