METABOLISM OF THE UREASE INHIBITOR N-(N-BUTYL)THIOPHOSPHORIC TRIAMIDE (NBPT) IN SOILS

被引:54
作者
HENDRICKSON, LL [1 ]
DOUGLASS, EA [1 ]
机构
[1] USDA ARS,MWA,NATL SOIL TILTH LAB,AMES,IA 50011
关键词
D O I
10.1016/0038-0717(93)90017-6
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
An experiment was conducted to relate the effectiveness of N-(n-butyl)thiophosphoric triamide (NBPT) and its oxon analog N-(n-butyl)phosphoric triamide (BNPO) in controlling urea hydrolysis in soils to their corresponding soil concentrations. Both compounds were applied to an acid soil (pH 4.9) and to the same soil that had been neutralized (pH 7.1) by long-term liming or by the recent application of Ca(OH)2. Hydrolysis of urea applied with the inhibitors was monitored along with the disappearance of the compounds themselves. Both compounds controlled urea hydrolysis much more effectively in the neutral soils than in the acid soil. HPLC analysis of soil extracts demonstrated that both compounds disappeared more rapidly in the acid soil, and that the compounds disappeared at similar rates for both neutral soils, indicating that pH governed disappearance rates in these soils. Disappearance rates were generally first-order for both compounds, although NBPT disappeared at an accelerated rate at low concentrations, presumably due to its simultaneous conversion to BNPO. The effectiveness of both compounds in controlling urea hydrolysis was closely related to the concentrations of BNPO found in the soil. BNPO was generally maintained at higher concentrations following NBPT application than when BNPO was applied directly to soil.
引用
收藏
页码:1613 / 1618
页数:6
相关论文
共 19 条
[1]   EFFECTIVENESS OF PHOSPHOROAMIDES IN RETARDING HYDROLYSIS OF UREA SURFACE-APPLIED TO SOILS WITH VARIOUS PH AND RESIDUE COVER [J].
BEYROUTY, CA ;
NELSON, DW ;
SOMMERS, LE .
SOIL SCIENCE, 1988, 145 (05) :345-352
[2]  
Bremner J.M., 1978, SOIL ENZYMES, P149
[3]   EVALUATION OF N-BUTYL PHOSPHOROTHIOIC TRIAMIDE FOR RETARDATION OF UREA HYDROLYSIS IN SOIL [J].
BREMNER, JM ;
CHAI, HS .
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 1986, 17 (03) :337-351
[4]  
BREMNER JM, 1989, BIOL FERT SOILS, V8, P227, DOI 10.1007/BF00266483
[5]   EFFECT OF 2 UREASE INHIBITORS ON FLOODWATER AMMONIA FOLLOWING UREA APPLICATION TO LOWLAND RICE [J].
BURESH, RJ ;
DEDATTA, SK ;
PADILLA, JL ;
SAMSON, MI .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1988, 52 (03) :856-861
[6]  
BYRNES BH, 1989, FERT RES, V18, P221, DOI 10.1007/BF01049572
[7]  
BYRNES BH, 1988, AGR ABSTR, P212
[8]   TEMPERATURE AND LOW CONCENTRATION EFFECTS OF THE UREASE INHIBITOR N-(N-BUTYL) THIOPHOSPHORIC TRIAMIDE (NBTPT) ON AMMONIA VOLATILIZATION FROM UREA [J].
CARMONA, G ;
CHRISTIANSON, CB ;
BYRNES, BH .
SOIL BIOLOGY & BIOCHEMISTRY, 1990, 22 (07) :933-937
[9]   A COMPARISON OF THE SULFUR AND OXYGEN ANALOGS OF PHOSPHORIC TRIAMIDE UREASE INHIBITORS IN REDUCING UREA HYDROLYSIS AND AMMONIA VOLATILIZATION [J].
CHRISTIANSON, CB ;
BYRNES, BH ;
CARMONA, G .
FERTILIZER RESEARCH, 1990, 26 (1-3) :21-27
[10]   UREASE INHIBITORY ACTIVITY ASSOCIATED WITH N-(NORMAL-BUTYL)THIOPHOSPHORIC TRIAMIDE IS DUE TO FORMATION OF ITS OXON ANALOG [J].
CREASON, GL ;
SCHMITT, MR ;
DOUGLASS, EA ;
HENDRICKSON, LL .
SOIL BIOLOGY & BIOCHEMISTRY, 1990, 22 (02) :209-211