Abstract
A field experiment was carried out at the Shenyang Experimental Station of Ecology (CAS) in order to study the effects of slow-release urea fertilizers high polymer-coated urea (SRU1), SRU1 mixed with dicyandiamide DCD (SRU2), and SRU1 mixed with calcium carbide CaC2 (SRU3) on urease activity, microbial biomass C and N, and nematode communities in an aquic brown soil during the maize growth period. The results demonstrated that the application of slow-release urea fertilizers inhibits soil urease activity and increases the soil NH4+-N content. Soil available N increment could promote its immobilization by microorganisms. Determination of soil microbial biomass N indicated that a combined application of coated urea and nitrification inhibitors increased the soil active N pool. The population of predators/omnivores indicated that treatment with SRU2 could provide enough soil NH4+-N to promote maize growth and increased the food resource for the soil fauna compared with the other treatments. Copyright by Science in China Press 2005.
Original language | English |
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Pages (from-to) | 26-32 |
Number of pages | 7 |
Journal | Science in China, Series C: Life Sciences |
Volume | 48 |
Issue number | SUPPL.1 |
DOIs | |
State | Published - 2005 |
Externally published | Yes |
Keywords
- Aquic brown soil
- Microbial biomass
- Nematode community
- Slow-release urea
- Urease activity