Full TGIF Record # 174821
Item 1 of 1
DOI:10.1080/00103624.2010.511370
Web URL(s):http://www.informaworld.com/smpp/section?content=a929168224&fulltext=713240928
    Last checked: 01/18/2011
    Access conditions: Item is within a limited-access website
Publication Type:
i
Report
Author(s):Zhao, Kun; Li, Shi-Qing; Xu, Bing-Cheng; Lu, Hong-Ling; Li, Sheng-Xiu
Author Affiliation:Zhao, Li, Shi-Qing and Xu: State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources; Zhao, Li, Shi-Qing and Li, Sheng-Xiu: College of Resources and Environmental Sciences, Northwest A&F University, Yangling, China; Zhao: Shaanxi Provincial High-Quality Agricultural Products Center, Xi'an, China; Lu: Institute of Scientific and Technical Information, Hunan Academy of Agricultural Sciences, Changsha, Hunan, China
Title:Comparative study on disturbed and undisturbed soil sample incubation for estimating soil nitrogen-supplying capacity
Source:Communications in Soil Science and Plant Analysis. Vol. 41, No. 20, January 2010, p. 2371-2382.
# of Pages:12
Publishing Information:New York, NY: Marcel Dekker
Keywords:TIC Keywords: Comparisons; Disturbed soils; Lolium perenne; Mineralization; Nitrate losses; Nitrogen cycle; Nitrogen efficiency; Nitrogen fertilization; Soil sampling; Undisturbed sampling
Abstract/Contents:"Application of nitrogen (N) fertilizers without knowing the N-supplying capacity of soils may lead to low N use efficiency, uneconomical crop production, and pollution of the environment. Based on the results from pot experiments treated with soil initial nitrate leaching and native soil, long-term alternate leaching aerobic incubation was conducted to study the disturbed and undisturbed soil N-supplying capacity of surface soil samples in 11 sites with different fertilities on the Loess Plateau. The results indicated that the entire indexes and ryegrass (Lolium perenne) uptake N with soil initial nitrate leaching showed a better correlation than that without soil initial nitrate leaching. Except the correlation coefficients for soil initial nitrate (NO3-) -N and mineral N extracted by calcium chloride (CaCl2) before aerobic incubation with ryegrass uptake without soil initial nitrate leaching, the correlation coefficients for soil initial NO3- -N and mineral N extracted by CaCl2 before aerobic incubation with ryegrass uptake with soil initial nitrate leaching and those for mineralizable N extracted by aerobic incubation, soil initial mineral N and mineralizable N extracted by aerobic incubation, potentially mineralizable N (N0) and soil initial mineral N + N0 with ryegrass uptake N under the two cases in disturbed treatment were all higher than those in undisturbed treatment.We concluded that NO3- -N in soil extracted by CaCl2 before aerobic incubation can reflect soil N-supplying capacity but cannot reflect soil potential N-supplying capacity. Without soil initial nitrate leaching, the effect of disturbed and undisturbed soil samples incubated under laboratory conditions for estimating soil N-supplying capacity was not good; however, with soil initial nitrate leaching, this method could give better results for soil N-supplying capacity. Based on the results from pot experiments treated with soil initial nitrate leaching and native soil, the mineralization of disturbed soil samples can give provide better results for predicting soil N-supplying capacity for in situ structure soil conditions on the Loess Plateau than undisturbed soil samples."
Language:English
References:27
Note:Tables
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhao, K., S.-Q. Li, B.-C. Xu, H.-L. Lu, and S.-X. Li. 2010. Comparative study on disturbed and undisturbed soil sample incubation for estimating soil nitrogen-supplying capacity. Commun. Soil. Sci. Plant Anal. 41(20):p. 2371-2382.
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DOI: 10.1080/00103624.2010.511370
Web URL(s):
http://www.informaworld.com/smpp/section?content=a929168224&fulltext=713240928
    Last checked: 01/18/2011
    Access conditions: Item is within a limited-access website
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