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[1]ZHAO Li.Effects of Nitrogen Addition on the Soil Nutrient and Microbial Biomass in Root Zone of Medicagosativa[J].Research of Soil and Water Conservation,2014,21(06):35-40.

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Effects of Nitrogen Addition on the Soil Nutrient and Microbial Biomass in Root Zone of Medicagosativa

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 06 Page number: 35-40 Column: Public date: 2014-12-28

Title:: Effects of Nitrogen Addition on the Soil Nutrient and Microbial Biomass in Root Zone of Medicagosativa

Author(s):: ZHAO Li; Department of Pharmaceutical and Biological Engineering, Zibo Vocational Institute, Zibo, Shandong 255314, China

Keywords:: nitrogen addition; Medicagosativa; root zone; soil nutrient; soil microbial biomass

CLC:: S812.5

DOI:: -

Abstract:: By using a manual nitrogen addition method, the responses of the soil nutrient and microbial biomass in root zone of of Medicagosativa to different nitrogen addition levels such as CK, LN [10 g/(m²·a)], MN [20 g/(m²·a)], HN [30 g/(m²·a)] were examined. The results indicated that the nitrogen addition stimulated the soil nutrient and microbial biomass in root zone, but no significant effect of nitrogen addition on soil total nitrogen in the root zone was observed(P > 0.05). The soil nutrient and microbial biomass in root of Medicagosativa first increased and then decreased with nitrogen additions which showed the order of MN > HN > LN > CK. In all treatments, the soil nutrient and microbial biomass in root zone of Medicagosativa except the soil total nitrogen were significant higher than CK (P < 0.05). The sensibility to nitrogen addition of soil microbial biomass in the root zone of Medicagosativa was higher than that of soil nutrient, and soil active organic carbon was the sensitive indicator to change of soil nutrient in the root zone of Medicagosativa of all treatments. Pearson correlation analysis showed that soil microbial biomass and nutrient had a significant positive correlation with soil moisture and negative correlation with soil pH which illustrated the uniformity of underground ecosystem such as soil physical and chemical factors, nutrient and microbial biomass or other various indicators.

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