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| 1 | Nitrogen Release from Slow-Release Fertilizers in Soils with Different Microbial Activities显示文摘Soil microbial activity is recognized as an important factor affecting nitrogen (N) release from slow-release fertilizers. However,studies on the effect of size and activity of soil microflora on fertilizer degradation have provided contrasting results. To date, no clear relationships exist between soil microbial activity and the release of N from slow-release fertilizers. Hence, the aim of this study was to better understand such relationships by determining the release of N from three slow-release fertilizers in soils with different microbial activities. Soils were amended with urea-formaldehyde (UF), isobutylidene diurea (IBDU), and crotonylidene diurea (CDU). Urea, a soluble fertilizer, was used as the control. Fertilized soil samples were placed in a leaching system, and the release of N was determined by measuring ammonium-N and nitrate-N concentrations in leachates during 90 d of incubation. Non-linear regression was used to fit N leaching rate to a first-order model. In all the treated soils, N was released in the order: urea (89%–100%) > IBDU (59%–94%) >UF (46%–73%) > CDU (44%–56%). At the end of incubation, N released from CDU did not differ (P > 0.05) among soils. On the contrary, UF and IBDU released significantly lower (P < 0.05) amounts of N in the soil with higher microbial activity and lower pH.The rate constant (K_0) for UF was lower (P < 0.05) in the soil with lower pH. Taken together, our results indicated that soil microbial size and microbial activity had a marginal effect on fertilizer mineralization. | Pierfrancesco NARDI Ulderico NERI Giovanni DI MATTEO Alessandra TRINCHERA Rosario NAPOLI Roberta FARINA Guntur V. SUBBARAO Anna BENEDETTI | 2018 | Pedosphere2018，28，2： | 4 |
| 2 | Intracellular, Intercellular, and Stromal Invasion of Gastric Mucosa, Preneoplastic Lesions, and Cancer by Helicobacter pylori显示文摘 | Vittorio Necchi Maria Elena Candusso Francesca Tava Ombretta Luinetti Ulderico Ventura Roberto Fiocca Vittorio Ricci Enrico Solcia | 2007 | Gastroenterology2007，，3： | 2 |
| 3 | Magnitude of post-Middle Jussic (Bajocian) displacement on the central Altyn Tagh fault system,northwest China显示文摘 | BRADLEY D Ritts ULDERICO Biffi | 2000 | GSA Bulletin2000，112，1： | 1 |
| 4 | Magnitude of post-Middle Jurassic (Bajocian) displacement on the central Altyn Tagh fault system,northwest China显示文摘 | Ulderico B | 2000 | GSA Bulletin2000，112，1： | 1 |
| 5 | Predictors of fail-ure of noninvasive ventilation in patients with severe community -acquired pneumonia 显示文摘 | MICHELE C ULDERICO F MANUEL Z | 2010 | Journal of Critical Care2010，25，： | 1 |
| 6 | Carbon concentrations and carbon storage capacity of three old-growth forests in the Sila National Park,Southern Italy显示文摘Old-growth forests play a key-role in reducing atmospheric carbon dioxide(CO_(2)) concentrations by storing large CO_(2)amounts in biomass and soil over time.This quantifies the carbon pool into different forest compartments in three Mediterranean old-growth forests of Southern Italy populated by Pinus laricio,Fagus sylvatica and Abies alba.Ecosystem carbon pools have been assessed per compartment,i.e.,living trees,dead wood,litterfall(foliar and woody),roots and 0-20 cm topsoil,combining the whole old-growth forest mass,(i.e.,using tree allometric relationships,deadwood factor conversions,root-to-shoot ratios,litterfall and soil samplings) by the respective organic carbon concentrations.The results show the considerable capacity of these forest ecosystems in storing CO_(2)in biomass and soil,with carbon pool values ranging from 532.2to 596.5 Mg C ha-1.Living trees and 0-20 cm topsoil had larger carbon pool,contributing 53.0 and 22.1%,respectively.In most cases,organic carbon concentration was higher(more than 60%) than the average carbon conversion rate of 50%,especially in living trees,deadwood,and woody litterfall.This study contributes further scientific evidence of the capacity of old-growth forests in storing CO_(2)in their different compartments,with special evidence on tree biomass,litterfall and mineral soil,thereby highlighting the key role of old-growth forests within the challenge of climate change mitigation. | Giovanni Di Matteo Giuseppe Luzzi Antonio Basile Angelo Sposato Giada Bertini Ulderico Neri Bruno Pennelli Rosario Napoli Pierfrancesco Nardi | 2023 | Journal of Forestry Research2023，34，1： | 0 |
| 7 | 地中海东部诸国和岛屿的天然气计划显示文摘介绍了地中海地区的天然气储量,预测了西欧和近东地区未来10年对地中海地区天然气的需求,重点说明了地中海东部诸国和岛屿的天然气计划,包括这一地区未来的天然气输气系统和向西欧输气的具体方案等。 | Tiberio Ulderico Donati E Gallipoli M 李明 | 1997 | 天然气地球科学1997，8，5： | 0 |
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