COMPARATIVE AGRO-ECOLOGICAL ASSESSMENT OF CATTLE AND PIGS’ MANURE BY CONTENT OF NUTRIENTS
Keywords:
cattle, pig, fresh and stored manure, nutrients (N, P, K), assessmentAbstract
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 livestock
buildings, manure storage and lagoons. They were analyzed for total N, total P and total K content by
routine 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 for
fresh and with 1.42 times for the stored manure (at P<0.001); total P, respectively with 3.39 times and
3.14 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.
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