Present study was undertaken in order to evaluate the lead contents of various feedstuffs produced in Korea and the effect of the burning of gasoline by automobiles on the lead contents. Ninty-one samples near and 95 far road were collected from 9 regions(Do). All of the samples were washed, dry-ashed and analyzed for lead content using atomic absorption spectrophotometer. The mean values obtained were checked for significance of difference using computer. The lead content in micro g/g of agriculture-byproducts were measured with the following mean values and ranges (in parenthesis). Rice bran:2.07+-1.67 (0-5.00), rice hull : 1.84+-1.18 (0-3.71), rice straw:1.27+-1.09(0-3.62), soybean pod; 4.55+-3.13 (1.13+-10.43), and wheat bran: 1.69+-0.86 (0-3.65). The lead content in micro g/g of pasture plants were measured with the following mean values and ranges. Kudzu:2.71+-1.74 (0.38+-8.75), leed: 2.03+-1.61 (0-4.54), lespedeza:4.73+-5.93 (0-31.25), sagebrush: 4.08+-3.75 (0-12.18), Korean-grass: 2.11+-1.38 (0-5.50), maizestalk: 2.62+-2.35 (0-8.65), clover: 3.83+-2.97 (0-12.19), alfalfa: 7.14+-0.97 (4.46-9.25), and timothy: 5.86+-4.79 (0-9.25). Fourteen samples (22.2%) out of 63 agriculture-byproduct samples and 42 (34.2%) out of 123 pasture plant samples showed lead content of more than 3 micro g/g which are said to be the upper limit value for cattle. No significant difference between the mean lead contents of near road, and those of far road was recorgnized. The regional mean values for all kinds of samples collected in Kyungbuk and Kyungnam were significantly (p0.05, p0.10) higher compared to those in Chungnam and Chejudo. From these results it may be concluded that the buring of gasoline by automobiles did not affect the lead contentes of washed feedstuffs produced in Korea at present

Research on preserving ability of the biological preserving agent Bioplant for grass and maize silage making was realized in the conditions of the Republic of Belarus. Application of Bioplant in course of grasess and maize encilaging promoted the faster accumulation of the significant amount of milk acid and decreasing of рН up to 4,1-4,2. Silage which was prepared with preserving agent Bioplant corresponded to the top grade of quality. Application of Bioplant for preparation of siloed forages promoted the reduction of losses at their storage. For example, in grass-legume and cereal silage there was a reduction of dry matter losses in comparison with control silage - on 4,7 and 4,2%, crude protein - on 5,6 and 5,0%, respectively. In maize silage the addition of the preserving agent there was stated the decreasing of nutrient losses in comparison with the control: dry matter - on 5,2%, crude protein - on 6,2%. Feeding of wedder hogs with the silage preserved by the preserving agent Bioplant provided higher digestibility of crude protein in comparison with the control group: on 3,2% in the conditions of grass-legume silage use, on 2,4% - in the conditions of feeding with cereals, and on 2,9% - in the conditions of feeding with maize silage

For soil – climatic conditions of a northeast part of the Republic of Belarus is recommended cultivating four-componential – fodder grass with two leguminous components (meadow clover + Lucerne sowing+ meadow timothy+ meadow fescue), productivity of which green weight has made 500 – 550 centers per hectare, gathering of crude fiber-19-21 centers per hectare. Inclusion of Lucerne sowing in clover-cereal fodder grass has provided a share of a leguminous component on average for four years no less than 75%