scholarly journals Effect of 7-year application of a nitrification inhibitor, dicyandiamide (DCD), on soil microbial biomass, protease and deaminase activities, and the abundance of bacteria and archaea in pasture soils

2013 ◽  
Vol 13 (4) ◽  
pp. 753-759 ◽  
Author(s):  
Yan J. Guo ◽  
Hong J. Di ◽  
Keith C. Cameron ◽  
Bowen Li ◽  
Andriy Podolyan ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Nitrification Inhibitor ◽  
Soil Microbial

Effects of temperature and application rate of a nitrification inhibitor, dicyandiamide (DCD), on nitrification rate and microbial biomass in a grazed pasture soil

Soil Research ◽  
2004 ◽  
Vol 42 (8) ◽  
pp. 927 ◽  
Author(s):  
H. J. Di ◽  
K. C. Cameron
Keyword(s):  
Microbial Biomass ◽  
Soil Temperature ◽  
Nitrate Leaching ◽  
Half Life ◽  
Soil Microbial Biomass ◽  
Nitrification Inhibitor ◽  
Application Rate ◽  
Nitrification Rate ◽  
Soil Microbial ◽  
Grazed Pasture

Abstract. The nitrification inhibitor dicyandiamide (DCD) has recently been shown to be effective in reducing nitrate leaching from grazed pasture soils. The objective of this study was to determine the influence of temperature and application rate on the effectiveness of DCD in nitrification inhibition. Possible effects on soil microbial biomass were also determined. The soil, Lismore silt loam (Pallic orthic brown soil; Udic Haplustept loamy skeletal), was incubated at a moisture content near field capacity under 2 temperatures (8 or 20°C). Urea was applied at 25 kg N/ha and dairy cow urine at 1000 kg N/ha. DCD was applied at 2 rates equivalent to 7.5 or 15 kg/ha. The results show that at a soil temperature of 8°C, the half-life of DCD was 111–116 days. The half-life of NH4+ changed from 44 days without DCD to 243–491 days when DCD was applied. In contrast, at a soil temperature of 20°C the half-life of DCD was 18–25 days. The half-life of NH4+ changed from 22 days without DCD to 64–55 days with DCD. The 2 different rates of DCD had a small effect on the NH4+ concentration in the soil. The application of DCD did not have a significant effect on soil microbial biomass. DCD would therefore be most effective in inhibiting nitrification and thus reducing nitrate leaching in late autumn–winter–early spring in most parts of New Zealand when daily average soil temperatures are generally below 10°C and when drainage is high.

Soil microbial biomass and activity under different agricultural management systems in a semiarid Mediterranean agroecosystem

2010 ◽  
Vol 109 (2) ◽  
pp. 110-115 ◽  
Author(s):  
F. García-Orenes ◽  
C. Guerrero ◽  
A. Roldán ◽  
J. Mataix-Solera ◽  
A. Cerdà ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Agricultural Management ◽  
Management Systems ◽  
Soil Microbial

Soil microbial biomass as affected by non-flooded plastic mulching cultivation in rice

2006 ◽  
Vol 43 (1) ◽  
pp. 107-111 ◽  
Author(s):  
Yong-Shan Li ◽  
Liang-Huan Wu ◽  
Xing-Hua Lu ◽  
Li-Mei Zhao ◽  
Qiao-Lan Fan ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Soil Microbial Biomass ◽  
Soil Microbial ◽  
Plastic Mulching

EFFECTS OF GREEN MANURE CONTINUOUS APPLICATION ON SOIL MICROBIAL BIOMASS AND ENZYME ACTIVITY

2014 ◽  
Vol 37 (4) ◽  
pp. 498-508 ◽  
Author(s):  
Xiefeng Ye ◽  
Hongen Liu ◽  
Zheng Li ◽  
Yong Wang ◽  
Yingyuan Wang ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Green Manure ◽  
Soil Microbial Biomass ◽  
Soil Microbial ◽  
Continuous Application
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