Carbon and nitrogen mineralization of sewage sludge compost in soils with a different initial pH(Fertilizers and Soil Amendments)

スポンサーリンク

概要

• 論文の詳細を見る

• Soil properties may affect the decomposition of added organic materials and inorganic nitrogen (N) production in agricultural soils. Three soils, Potu (Pu), Sankengtzu (Sk) and Erhlin (Eh) soils, mixed with sewage sludge compost (SSC) at application rates of 0 (control), 25, 75 and 150Mg ha^<-1> were selected from Taiwan for incubation for 112 days. The aim of the present study was to examine the effects of SSC application rates on the carbon decomposition rate, N transformation and pH changes in three soils with different initial soil pH values (4.8-7.7). The results indicated that the highest peaks of the CO_2 evolution rate occurred after 3 days of incubation, for all treatments. The Pu soil (pH4.8) had a relatively low rate of CO_2 evolution, total amounts of CO_2 evolution and percentage of added organic C loss, all of which resulted from inhibition of microbial activity under low pH. For the Pu and Sk soils, the concentration of NH_4^+-N reached its peak after 7-14 days of incubation, which indicated that ammonification might have occurred in the two soils with low initial pH values. NO_3^--N rapidly accumulated in the first 7 days of incubation in the Eh soil (pH 7.7). The direction and extent of the soil pH changes were influenced by the N in the SSC and the initial soil pH. Ammonification of organic N in the SSC caused the soil pH to increase, whereas nitrification of mineralized N caused the soil pH to decline. Consequently, the initial soil pH greatly affected the rate of carbon decomposition, ammonification and nitrification of SSC.

著者

• HUANG Cheng-Chieh

  Department of Agricultural Chemistry, National Taiwan University

• CHEN Zueng-Sang

  Department of Agricultural Chemistry, National Taiwan University

• Chen Zueng-sang

  Department Of Agricultural Chemistry National Taiwan University

• Huang Cheng-chieh

  Department Of Agricultural Chemistry National Taiwan University

関連論文

• Carbon and nitrogen mineralization of sewage sludge compost in soils with a different initial pH(Fertilizers and Soil Amendments)
• Remediation techniques and heavy metal uptake by different rice varieties in metal-contaminated soils of Taiwan : New aspects for food safety regulation and sustainable agriculture(Recent Progress of Agro-Environmental studies in the East
• Pedological Activities of Taiwan in Last 50 Years and Strategies for the Future
• Pedological Characteristics and Heavy Metals Contamination of the Paddy Soils in Taiwan
• Pedological Characteristics and Heavy Metals Contamination in Rice Production of the Paddy Soils in Taiwan(Frontiers in Rice Science -from Gene to Field-,The 100^ Anniversary of Tohoku University, International Symposium)
• Soil and phosphorus redistribution along a steep tea plantation in the Feitsui reservoir catchment of northern Taiwan(Environment)
• Net nitrogen mineralization and nitrification of different landscape positions in a lowland subtropical rainforest in Taiwan(Soil Fertility)
• The Characteristics and Genesis of Volcanic Soils in Taiwan(International symposium on volcanic ash soils and field workshop in the Mt. Fuji area)
• シンポジウム Pedological Activities of Taiwan in Last 50 Years and Strategies for the Future (〔日本ペトロジー学会50周年記念大会〕シンポジウム)

スポンサーリンク