TAILIEUCHUNG - The effect of compaction on urease enzyme activity, carbon dioxide evaluation and nitrogen mineralisation

The effects of compaction on urease enzyme activity, carbon dioxide evaluation and nitrogen mineralisation of urea-treated and untreated soils were investigated. | Turk J Agric For 24 (2000) 437–441 © TÜBİTAK The Effect of Compaction on Urease Enzyme Activity, Carbon Dioxide Evaluation and Nitrogen Mineralisation Ayten KARACA, Abdullah BARAN, Koray KAKTANIR Ankara University, Faculty of Agriculture, Soil Science Department, Ankara-TURKEY Received: Abstract: The effects of compaction on urease enzyme activity, carbon dioxide evaluation and nitrogen mineralisation of urea-treated and untreated soils were investigated. Soils were compacted at compaction levels of O kgcm-2 , 2 kgcm-2 and 4 kgcm-2 and incubated for 28 days. The changes in urease enzyme activity, CO2 evaluation and nitrogen mineralization were determined during incubation periods. Urease enzyme activity was decreased significantly (). Ancak üre ilave edilen topraklarda toprak sıkışmasının üreaz enzim aktivitesi ve CO2 çıkışı üzerine olan olumsuz etkisi üre ilave edilmeyen topraklara göre daha az bulunmuştur. İnkübasyon süresine bağlı olarak üre ilave edilmiş topraklarda üre ilave edilmemişe göre yaklaşık 5 kat fazla NH4+ -N’u ve 4 kat fazla NO3- -N’u belirlenmiş olup, her iki basınç uygulamasında da nitrifikasyon olayı önemli ölçüde engellenmiştir (P<). Anahtar Sözcükler: Toprak sıkışması, üreaz enzim aktivitesi, karbondioksit çıkışı, azot mineralizasyonu. Introduction Compacting of soil may cause problems by changing the porosity in the soil. Since this has effects on biological activity as well as on the physical properties of the soil, the growth of plants and roots may be negatively influenced (1, 2). Studies concerning aeration characteristics of soil and its effects on growth of plants are mostly concentrated on the composition of air in the soil. The composition of soil air is much different from the of atmospheric air, and its character depends on the biology of the soil. In addition, compacting humidity and soil layer thickness also influence the air content of soil. Many authors have researched air composition in soil to determine

• Nông nghiệp
• Compacting of soil
• Urease enzyme activity
• Carbon dioxide evaluation
• Nitrogen mineralisation
• Enzyme activity
• Crpping system
• Soil enzyme activity
• Different cropping system
• Important soil enzyme activity
• Organic carbon
• Microbial activity with different depth
• Antioxidant enzymes
• Temperature induction response
• Temperature enhances antioxidant enzyme activity
• Osmoprotectants in tomato
• Early postemergence
• Greengram (Vigna radiata L )
• Nutrient uptake by weeds
• Angiotensin converting enzyme inhibitory activity
• Vietnamese medicinal plants
• Angiotensin 1 converting enzyme
• Leea rubra
• Uncaria sessilifructus
• Residue management
• Soil enzyme
• Soil quality
• Diverse cropping systems
• Residue management practices
• Trichoderma reesei
• Chitinase enzyme
• CDR Design
• Potato dextrose agar
• Enhance chitinase enzyme activity
• Gamma radiation induced mutagenesis
• Candida albicans
• Secreted aspartyl proteinase activity
• Acid proteinase
• Bloodstream identified
• Microbial biomass carbon
• Enzymatic activity
• Typic haplustepts
• INM on soil microbial biomass carbon
• Enzyme activity under soybean
• L glutaminase
• pH on soil L glutaminase activity
• Soil L glutaminase activity
• Soil temperature
• Biochemistry
• molecular Biology
• biological cells
• chymotrypsin C
• Scientific reports
• Optimal pH
• Partial purification
• Intestinal triglyceride lipase
• Polyethylene glycol
• Conventional management
• Microbial biomass
• Organic management
• Vineyard soils
• Acute toxicity
• Chlorpyrifos on growth
• Chlorophyll a synthesis
• Cyanobacterium spirulina (Arthrospira) platensis
• Micronutrients on growth attributes
• Yield and soil enzyme activity
• Elephant foot yam
• Viable solution
• Important food crop
• L asparaginase
• Electrical conductivity
• Soil enzyme l asparaginase activity
• Physico chemical properties
• Dry DSR
• Soil microbial population
• Grain yield
• Dry direct seeded rice
• Organic manures
• Available nutrients
• Rice rice cropping system
• Long term use of inorganic fertilizers
• Combination on soil properties
• α galactosidase
• β glucosidase
• Fermented food
• Traditional fermented foods
• β glucosidase enzyme activity
• Lactic strains isolated
• BMC Cancer
• Cervical cancer
• Non enzymatic functions
• Cancer growth
• Quality protein maize
• Potassium and sulphur
• Nutrient application
• Oil palm kernel meal
• De oiled oil palm kernel meal based
• Biofloc system on growth
• Digestive enzyme activity
• Pacific white shrimp
• Litopenaeus Vannamei
• Pangasianodon hypophthlmus
• Effects of thermal stress
• Dietary zinc on growth performance
• Superoxide dismutase–1
• Catalase enzyme activity
• Pangasianodon hypophthalmus
• Ligninolytic enzymes
• Lignin peroxidase
• manganese peroxidase
• Five bacterial strains
• Culture conditions on ligninolytic enzyme
• Activity of five bacterial strains
• Journal of Chemistry
• PEGylated quinoline
• Colon cancer
• P glycoprotein
• Cytochrome P450 enzyme
• Polyethylene glycol (PEG)
• Polymeric carriers conjugated