In the presence of iron (Fe), dissolved organic matter (DOM) may bind considerable amounts of arsenic (As), through formation of Fe-bridged As-Fe-DOM complexes and surface complexation of As on DOM-stabilized Fe-colloids (collectively referred to as As-Fe-DOM complexation). However, direct (e.g., chromatographic and spectroscopic) evidence and fundamental kinetic and stability constants have be...

A survey of the interactions between phosphorus (P) species and the components of calcareous soils shows that both surface reactions and precipitation take place, especially in the presence of calcite and limestone. The principal products of these reactions are dicalcium phosphate and octacalcium phosphate, which may interconvert after formation. The role of calcium carbonate in P retention by ...

Increasing agricultural productivity and, in particular, the of livestock is one primary tasks present stage development society. This involves rational feeding and use biologically active substances, including humic preparations that activate digestive metabolic processes animal, promoting transformation feed nutrients assimilable form, raising daily milk production weight gain, can play an im...

The effects of cattle manure vermicompost on the growth and productivity of cymbidium (Cymbidium sp.) plants were evaluated under shade conditions. Cymbidium was grown in a container medium including 50% pumice, 30% charcoal, 10% vermiculite and 10% peat moss, which was basic plant growth medium substituted with 10%, 20%, 30% and 40% (by volume) vermicompost. The control consisted of container ...

The investigation of the mechanisms organic matter transformation in compost fertilizers is an urgent task modern soil ecology and chemistry. main components such are newly formed, weakly humified labile humic acids (HAs). objective study to determine mechanism converting formed HAs into forms with increased resistance microbiological biochemical influences. Obtained during plant residues decom...

Relevance. In the arsenal of agents with antibacterial activity, a significant place belongs to preparations based on raw materials two types Macleia - Macleaya x kevensis Turill. and cordata (Willd.) R.Br. used both in medical veterinary practice. It is possible provide domestic pharmaceutical industry these medicinal full through development methods for increasing yields adapting Maclea unsta...

Humic substances (HS) are often used as feesd additives in livestock feeding. The long-term effects of different concentrations HS aquafeed on growth and production performance, antioxidant status, stress resistance, gut microbiome, overall health condition, final product yield, sensory properties fresh cooked meat, composition fatty acids market size African catfish (Clarias gariepinus) origin...

The effect of humic substances from different sources on the performance and selected biochemical indicators was studied in 150 one-day-old broiler chickens (Ross 308) divided into control (C) and two tested groups (n = 50). Chickens of tested groups were fed diets supplemented with natural humic compounds (group HS) and sodium humate (group HNa) at amounts of 5 g·kg-1 of feeds in phase 1 and 7...