Abstract Background Leaching from agricultural land is one of the major pathways phosphorus (P) loss soils to waterbody and may induce adverse effect on territorial environment. Past studies usually focused inorganic P (P I ) while ignored role organic O in leaching process. A total 63 soil samples were collected across China with various types including 21 paddy soils, 13 chernozems, 11 red ot...

Abstract Long-term field experiments (LTFEs) can provide an extensive overview on the effectiveness of phosphorus (P) management. In order to have a detailed insight into availability and distribution P in soil as affected by organic inorganic fertilizers (no P, triple-superphosphate (TSP), compost + TSP), samples collected at LTFE established 1998 Northern Germany different sampling dates dept...

The aims of this study was to determine the effect of organic and inorganic Zn and Cu supplements on performance, footpad dermatitis (FPD), carcass characteristics and blood profile in broiler chickens. A total of 336 one-day-old Ross 308 broiler chicks were distributed into 24 floor pen and reared for 42 days. A basal mineral premix (without Zn and Cu) was supplemented with organic or inorgani...

We construct mass-balance based estimates of carbon (C) export fractions from the water column across the Chukchi Sea shelf. Export is calculated as the difference between phytoplankton drawdown of dissolved inorganic C (DIC) and the accumulation of autochthonous particulate and dissolved organic C in the water column. Organic carbon (Corg) exports of 450% of DIC drawdown are ubiquitous across ...

Soil carbon (C) in three Ginkgo (Ginkgo biloba L.) agroforestry systems, afforestation (Ginkgo alone; G), and an agricultural cropping system were compared over a five-year period. The agroforestry systems were Ginkgo + Wheat (Triticum aestivum L.) + Peanut (Arachis hypogaea L.; GWP); Ginkgo + Mulberry (Morus alba L.; GM); and Ginkgo + Rapa (Brassica napus L.) + Peanut (GRP). The agricultural s...

Understanding how soil phosphorus (P) fractions change is critical to achieve more efficient P use in a highly P-sorbing calcareous soil. The fields were managed without or with annual fertilizer (40 kg ha? 1), continuously growing sole cropping intercropping of maize and faba bean. Soil samples (0–200 mm) collected at the start experiment eight years later, we evaluated using sequential fracti...

The aim of the study was to (1) investigate distributions sulfur (S), iron (Fe), and phosphorus (P) in coastal surface sediments under stresses high salinity heavy metals; (2) identify potential sources environmental geochemical process S–Fe mineral accumulation; (3) elucidate coupling mechanisms S–Fe–P stresses. reduced inorganic (RIS), P, reactive Fe (RFe) two rivers with metals (~50 psu, bri...

this work investigates the effect of the application rate and type of sludge throughout the soilcarbon cycle in a semiarid mediterranean agro-ecosystem. we study the two-year evolution of the variouspools of soil organic and inorganic carbon and their influence on soil respiration. we applied three rates (40, 80 and 160 mg/ha) of two types of sludge –aerobically and anaerobically digested sewag...

the 24 maltiparous holstein dairy cows were allocated in a completely randomized design to study the effects of different level and source of sulfur supplement in close-up diets on blood metabolites, colostrums composition and liver performance. the mean body weight of the cows was 687.9 kg and the mean days until expected calving date was 21.8 d. the first treatment (t1) has contained 0.21% su...