Water Treatment Residuals and Biosolids Co-applications Affect Phosphatases in a Semi-arid Rangeland Soil

被引:7
作者
Bayley, Robin M. [2 ]
Ippolito, James A. [1 ]
Stromberger, Mary E. [3 ]
Barbarick, Kenneth A. [3 ]
Paschke, Mark W. [4 ]
机构
[1] ARS, USDA, NWISRL, Kimberly, ID 83341 USA
[2] NRCS, USDA, Wheatland, WY USA
[3] Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 USA
[4] Colorado State Univ, Dept Forest Rangeland & Watershed Stewardship, Ft Collins, CO 80523 USA
关键词
Acid phosphomonoesterase; phosphodiesterase; phytase; pyrophosphatase; water treatment residuals;
D O I
10.1080/00103620802432733
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Co-application of biosolids and water treatment residuals (WTR) land has not been extensively studied but may be beneficial by sorbing excess biosolid-borne or soil phosphorus (P) onto WTR, reducing the likelihood of off-site movement. Reduction of excess soil P may affect the role of specific P-cleaving enzymes. The research objective was to understand the long-term effects of single co-applications and the short-term impacts of repeated co-applications on soil acid phosphomonoesterase, phosphodiesterase, pyrophosphatase, and phytase enzyme activities. Test plots were 7.5 15m with treatments consisting of three different WTR rates with a single biosolids rate (5, 10, and 21Mg WTR ha-1; 10Mg biosolids ha-1) surface co-applied once in 1991 or reapplied in 2002. Control plots consisted of those that received no WTR-biosolids co-applications and plots that received only 10Mg biosolids ha-1. Plots were sampled to a 5-cm depth in 2003 and 2004, and soil phosphatases and phytase enzyme activities were measured. Soil phosphodiesterase activity decreased in WTR-amended plots, and pyrophosphatase activity decreased with increasing WTR application rates. In contrast, acid phosphatase and phytase activity increased with WTR addition, with WTR application possibly triggering a deficiency response causing microorganisms or plants to secrete these enzymes. Biosolids and WTR co-applications may affect enzymatic strategies for P mineralization in this study site. Reductions in phosphodiesterase activity suggest less P mineralization from biomass sources, including nucleic acids and phospholipids. Increased acid phosphatase and phytase activities indicate that ester-P and inositol-P may be important plant-available P sources in soils amended with WTR.
引用
收藏
页码:2812 / 2826
页数:15
相关论文
共 52 条
[1]  
Anderson G., 1980, Khasawneh, F. E.
[2]  
Sample, E. C.
[3]  
Kamprath, E. J. : The role of phosphorus in agriculture. (Proceedings of a symposium held 1-3 June 1976 at the National Fertilizer Development Center, Tennessee Valley Authority, Muscle Shoals, Alabama)., P411
[4]  
[Anonymous], 1996, SOIL SCI SOC AM BOOK, DOI DOI 10.2136/SSSAB00KSER5.3.C5
[5]  
BAYLEY RM, 2006, THESIS COLORADO STAT
[6]  
BUGBEE GJ, 1985, CONN AGR EXP STN B, V823
[7]   Effects of plant species on microbial biomass phosphorus and phosphatase activity in a range of grassland soils [J].
Chen, CR ;
Condron, LM ;
Davis, MR ;
Sherlock, RR .
BIOLOGY AND FERTILITY OF SOILS, 2004, 40 (05) :313-322
[8]  
Colvan SR, 2001, BIOL FERT SOILS, V34, P258
[9]  
Condron L. M., 2005, Phosphorus: agriculture and the environment, P87
[10]  
Cosgrove D., 1967, Soil Biochemistry, P216