AN EVALUATION OF NITROGEN MINERALIZATION INDEXES FOR ORGANIC RESIDUES

被引:78
作者
DOUGLAS, BF
MAGDOFF, FR
机构
[1] UNIV VERMONT,DEPT PLANT & SOIL SCI,BURLINGTON,VT 05405
[2] VERMONT DEP ENVIRON CONSERV,DIV PROTECT,WATERBURY,VT 05676
关键词
D O I
10.2134/jeq1991.00472425002000020006x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Organic residues without high levels of toxic metal or organic constituents are usually applied to agricultural soils at rates based on assumed contributions of available N to the growing crop. However, there is no accepted test for assessing potential available N supply from residues. Although the actual contribution will depend on soil characteristics and climate as well as residue characteristics, a chemical index might be useful in ranking residues according to potential available N contributions. An experiment was conducted to evaluate a number of chemical indices for N availability. The 19 residues used in the study consisted of seven types of manures, six sewage sludges, and six composted or mixed soil amendments. Organic residues were mixed with sandy top-soil and perlite and incubated in glass tubes in the laboratory for 67 d. Total N, total Kjeldahl N, organic N, and N released into the Walkely-Black acid-dichromate digest (WBN) were significantly correlated with the amount of N mineralized as well as the fraction of organic N mineralized during the incubation. The best relationship for the amount of N mineralized was with WBN (r2 = 0.89 for a quadratic relationship). The strongest of the correlations for fraction of organic N mineralized was also with WBN (r2 = 0.82).
引用
收藏
页码:368 / 372
页数:5
相关论文
共 28 条
[1]  
AMADON JF, 1979, THESIS U VERMONT BUR
[2]  
[Anonymous], 1976, STANDARD METHODS EXA
[3]   FACTORS AFFECTING THE MINERALIZATION OF NITROGEN IN SEWAGE-SLUDGE APPLIED TO SOILS [J].
BARBARIKA, A ;
SIKORA, LJ ;
COLACICCO, D .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1985, 49 (06) :1403-1406
[4]   ESTIMATING THE AVAILABILITY OF NITROGEN IN POULTRY MANURE THROUGH LABORATORY AND FIELD STUDIES [J].
BITZER, CC ;
SIMS, JT .
JOURNAL OF ENVIRONMENTAL QUALITY, 1988, 17 (01) :47-54
[5]   CORRELATIONS BETWEEN SOIL NITRATE CONCENTRATIONS IN LATE SPRING AND CORN YIELDS IN IOWA [J].
BLACKMER, AM ;
POTTKER, D ;
CERRATO, ME ;
WEBB, J .
JOURNAL OF PRODUCTION AGRICULTURE, 1989, 2 (02) :103-109
[6]   MINERALIZATION OF MANURE NITROGEN - CORRELATION WITH LABORATORY INDEXES [J].
CASTELLANOS, JZ ;
PRATT, PF .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1981, 45 (02) :354-357
[7]   MINERALIZATION OF NITROGEN IN SOILS AMENDED WITH ORGANIC WASTES [J].
CHAE, YM ;
TABATABAI, MA .
JOURNAL OF ENVIRONMENTAL QUALITY, 1986, 15 (02) :193-198
[8]  
CHAUSSOD R, 1985, EFFICIENT LAND USE S, P24
[9]   LABORATORY METHODS FOR ESTIMATING AVAILABLE NITROGEN IN MANURES AND SLUDGES [J].
CHESCHEIR, GM ;
WESTERMAN, PW ;
SAFLEY, LM .
AGRICULTURAL WASTES, 1986, 18 (03) :175-195
[10]   RAPID METHOD FOR ESTIMATING NITROGEN-SUPPLYING CAPABILITY OF A SOIL [J].
FOX, RH ;
PIEKIELEK, WP .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1978, 42 (05) :751-753