СРАВНИТЕЛНА АГРОЕКОЛОГИЧНА ОЦЕНКА НА ТОР ОТ ГОВЕДА И СВИНЕ ПО СЪДЪРЖАНИЕ НА БИОГЕННИ ЕЛЕМЕНТИ | COMPARATIVE AGRO-ECOLOGICAL ASSESSMENT OF CATTLE AND PIGS’ MANURE BY CONTENT OF NUTRIENTS

Bulgarian. The aim of this paper was to study and assess a fresh and stored cattle and pig manure, for a period of 12 months by content of nutrients (N, P, K). Manure samples were collected monthly from the livestockbuildings, manure storage and lagoons. They were analyzed for total N, total P and total K content byroutine methods. It was found that: a) The content of N, P and K in the cattle and pigs’ manure is in the range as follows: cattle - fresh and stored manure: Total N: 0.41 - 0.68% and 0.34 - 0.57%, Total P: 0.14 - 0.19% and 0.12% - 0.17%; Total K: 0.20% - 0.51% and 0.12 to 0.32%; pigs - fresh and stored manure: Total N: 0.75 - 0.98% and 0.58 - 0.83%; Total P: 0.48 - 0.89% and 0.37% - 0.58%; Total K: 0.28 - 0.44%, and 0.12 to 0.22%; b) The loss of nutrients during the storage of manure of both animal species is not equal and is characterized by the following features: Total N: the losses are similar and vary in the following ranges, cattle manure - from 10.7% in spring to 20.2% in summer, on average 20.2%; pig manure - from 12.7% in winter to 22.1% in summer, on average 18.4%; Total P: losses in pig stored manure are larger than those of cattle manure, respectively, from 13.5% in winter to 37.2% in fall, on average 23.5% and from 10.2% in fall to 21.0% in summer, on average 14.0%; Total K: losses are similar for both total P, and ranged from 46.4% in summer to 62.1% in winter, on average 54.8% for pig manure and from 30.6% in winter to 52.3% in spring, an average 42.5% for cattle manure; c) Pig manure contains a larger amount of nutrients (N, P, K) in comparison with cattle manure: total N, an average with 1.48 times forfresh and with 1.42 times for the stored manure (at P<0.001); total P, respectively with 3.39 times and3.14 times (at P<0.001); total K, with 1.19 times for fresh manure, it was observed an inverse relationship for stored in manure, slightly higher are the levels of total K in cattle manure (with 1.07 times) as compared to pig manure.

English. The aim of this paper was to study and assess a fresh and stored cattle and pig manure, for a period of 12 months by content of nutrients (N, P, K). Manure samples were collected monthly from the livestockbuildings, manure storage and lagoons. They were analyzed for total N, total P and total K content byroutine methods. It was found that: a) The content of N, P and K in the cattle and pigs’ manure is in the range as follows: cattle - fresh and stored manure: Total N: 0.41 - 0.68% and 0.34 - 0.57%, Total P: 0.14 - 0.19% and 0.12% - 0.17%; Total K: 0.20% - 0.51% and 0.12 to 0.32%; pigs - fresh and stored manure: Total N: 0.75 - 0.98% and 0.58 - 0.83%; Total P: 0.48 - 0.89% and 0.37% - 0.58%; Total K: 0.28 - 0.44%, and 0.12 to 0.22%; b) The loss of nutrients during the storage of manure of both animal species is not equal and is characterized by the following features: Total N: the losses are similar and vary in the following ranges, cattle manure - from 10.7% in spring to 20.2% in summer, on average 20.2%; pig manure - from 12.7% in winter to 22.1% in summer, on average 18.4%; Total P: losses in pig stored manure are larger than those of cattle manure, respectively, from 13.5% in winter to 37.2% in fall, on average 23.5% and from 10.2% in fall to 21.0% in summer, on average 14.0%; Total K: losses are similar for both total P, and ranged from 46.4% in summer to 62.1% in winter, on average 54.8% for pig manure and from 30.6% in winter to 52.3% in spring, an average 42.5% for cattle manure; c) Pig manure contains a larger amount of nutrients (N, P, K) in comparison with cattle manure: total N, an average with 1.48 times forfresh and with 1.42 times for the stored manure (at P<0.001); total P, respectively with 3.39 times and3.14 times (at P<0.001); total K, with 1.19 times for fresh manure, it was observed an inverse relationship for stored in manure, slightly higher are the levels of total K in cattle manure (with 1.07 times) as compared to pig manure.