Microbial Biomass, N Mineralization and Nitrification, Enzyme Activities, and Microbial Community Diversity in Tea Orchard Soils

2006 ◽  
Vol 288 (1-2) ◽  
pp. 319-331 ◽  
Author(s):  
Dong Xue ◽  
Huaiying Yao ◽  
Changyong Huang
Keyword(s):  
Microbial Community ◽  
Microbial Biomass ◽  
Enzyme Activities ◽  
N Mineralization ◽  
Community Diversity ◽  
Microbial Biomass N ◽  
Microbial Community Diversity ◽  
Biomass N ◽  
Orchard Soils

Microbial Biomass, Community Diversity, and Enzyme Activities in Response to Urea Application in Tea Orchard Soils

2010 ◽  
Vol 41 (7) ◽  
pp. 797-810 ◽  
Author(s):  
Chaorong Ge ◽  
Dong Xue ◽  
Huaiying Yao
Keyword(s):  
Microbial Biomass ◽  
Enzyme Activities ◽  
Community Diversity ◽  
Orchard Soils

scholarly journals A comparative account of the microbial biomass-N and N-mineralization of soils under natural forest, grassland and crop field from dry tropical region, India

2009 ◽  
Vol 55 (No. 6) ◽  
pp. 223-230 ◽  
Author(s):  
S. Singh Jay ◽  
D.P. Singh ◽  
A.K. Kashyap
Keyword(s):  
Soil Moisture ◽  
Microbial Biomass ◽  
N Mineralization ◽  
Mixed Forest ◽  
Microbial Biomass N ◽  
Tropical Region ◽  
Net N Mineralization ◽  
Inorganic N ◽  
Total N ◽  
Biomass N

This study investigated microbial biomass-N (MB-N) and N-mineralization in soils of four different vegetation systems including forest (sal), mixed forest, savanna and cropland ecosystems in the Vindhyan region, India. A change was noted in the above region due to physiographic differences and anthropogenic disturbances. Annually the soil moisture (SM) content across the different study sites ranged from 7.5 to 24.3% being maximum in forest sites compared to savanna and cropland sites. The NH<sub>4</sub><sup>+</sup>-N, NO <sup>-</sup><sub>3</sub> -N and MB-N concentrations varied from 4.3 to 10.2 &mu;g/g, 1.1 to 5.8 &mu;g/g and 21.3 to 90.2 &mu;g/g dry soil, respectively, with minimum values in the wet and maximum values in the dry season. The trend of seasonal variation in net N-mineralization was similar to that of moisture content but counter to the concentrations of inorganic-N and MB-N. The net N-mineralization rates at different investigated sites ranged from 4.5 to 37.6 &mu;g/g month. Cultivation reduced the N-mineralization and MB-N by 58.5% and 63.5%, respectively. Experiments showed that the percentage contribution of MB-N to total-N was 8.01 to 19.15%. MB-N was positively correlated with the inorganic-N (<i>n</i> = 180,<i>r</i>.80,<i>P</I> < 0.001) but negatively with soil moisture (<i>n</i> = 180, <i>r</i> = 0.79, <i>P</I> < 0.001) and net N-mineralization rates (<i>n</i> = 180, <i>r</i> = 0.92, <i>P</I> < 0.0001). The higher N-mineralization and MB-N in the soil of forest ecosystem was reported compared to savanna and cropland and the order of soil MB-N levels and net N-mineralization followed the sequence: forest (sal) > mixed forest > savanna > cropland.

Immobilization of Cd in river sediments by sodium alginate modified nanoscale zero-valent iron: Impact on enzyme activities and microbial community diversity

2016 ◽  
Vol 106 ◽  
pp. 15-25 ◽  
Author(s):  
Danlian Huang ◽  
Wenjing Xue ◽  
Guangming Zeng ◽  
Jia Wan ◽  
Guomin Chen ◽  
...  
Keyword(s):  
Microbial Community ◽  
Sodium Alginate ◽  
Enzyme Activities ◽  
River Sediments ◽  
Zero Valent Iron ◽  
Community Diversity ◽  
Microbial Community Diversity ◽  
Nanoscale Zero Valent Iron

scholarly journals Effect of soil sealing on the microbial biomass, N transformation and related enzyme activities at various depths of soils in urban area of Beijing, China

2012 ◽  
Vol 12 (4) ◽  
pp. 519-530 ◽  
Author(s):  
Dan Zhao ◽  
Feng Li ◽  
Rusong Wang ◽  
Qingrui Yang ◽  
Hongshan Ni
Keyword(s):  
Microbial Biomass ◽  
Urban Area ◽  
Enzyme Activities ◽  
Microbial Biomass N ◽  
Soil Sealing ◽  
N Transformation ◽  
Biomass N ◽  
Related Enzyme ◽  
Beijing China

scholarly journals Effect of grassland management on N mineralization potential, microbial biomass and N yield in the following year.

1992 ◽  
Vol 40 (2) ◽  
pp. 173-185 ◽  
Author(s):  
J. Hassink
Keyword(s):  
Microbial Biomass ◽  
Sandy Soil ◽  
N Mineralization ◽  
Dry Matter ◽  
Residual Effect ◽  
Microbial Biomass N ◽  
Dry Matter Accumulation ◽  
N Yield ◽  
Biomass N ◽  
The Difference

The effect of mowing or grazing and mineral fertilizer level on N mineralization potential and microbial biomass N (N flush) was studied in 1988 on a sandy soil and a sedimentary calcareous silty loam (loam) in the Netherlands. On the loam the residual effect of the treatments on N yield and herbage dry matter accumulation in the following year was also studied. The different management practices were started in 1985 on the sandy soil and in 1986 on the loam. The amount of microbial biomass N was larger under grazing than under mowing. The increase in the amount of microbial biomass N due to grazing was larger for the loam than for the sandy soil. The N-mineralization rate was higher under grazing than under mowing. The difference in N-mineralization rates between grazed and mown fields was 20-30 % in April for both soils, but increased considerably in the sandy soil during the growing season. It was estimated that the difference in N-mineralization between mown and grazed plots under field conditions was 110 and 40 kg N/ha per year in the sandy soil and the loam, respectively. Thus the optimum N fertilizer application rate should be considerably lower under grazing conditions than under mowing conditions, especially on sandy soil. Fertilizer level had no effect on the amount of microbial biomass and rates of N-mineralization. Both grazing compared to mowing and increasing N fertilizer levels above 550 kg N/ha per year affected the N yield and dry matter accumulation in the following year (= residual effects) on the loam. These effects were greater for N yield than for dry matter accumulation. The residual effect of previous fertilizer input was probably caused by the presence of different amounts of N in roots and stubble. The residual effect on N yield under grazing exceeded that under mowing by 28%. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Sign in / Sign up

Export Citation Format

Share Document