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Alpha-tocopherol and beta-carotene of forage are antioxidants and play important roles in the immune system of ruminants. Fermentation quality, alpha-tocopherol and beta-carotene of high moisture napier grass ( Pennisetum purpureum cv. Mott) ensiled without or with additives (fibrolytic enzyme, EN; Lactobacillus plantarum , LP; tert-butylhydroquinone, TBHQ; tea polyphenols, TP) at 15 °C, 30 °C and 45 °C were examined in the present study. After ensiling for 70 days, untreated silages had lower ( P P P P P P P P P P P P P P P P 99) than at 30 °C (V-score 83), and TP lowered fermentation quality (V-score = 74.5). Silage ensiled at 30 °C increased alpha-tocopherol content and lost beta-carotene slightly. Additives did not reduce alpha-tocopherol and beta-carotene loss at any temperature, except for TBHQ ensiled at 45 °C. The interactions between additives and preservation temperatures indicated that TP ensiled at 30 °C had the poorest fermentation quality, LP and TBHQ ensiled at 30 °C had lower alpha-tocopherol loss, and TBHQ and TP ensiled at 30 °C had lower beta-carotene loss. TBHQ might be a valuable additive to ensile napier grass at 15 °C, 30 °C and 45 °C, and to reduce beta-carotene loss of napier grass silage at 45 °C.

The current subgrade workspace of the Shanghai heavy-loaded traffic main roads has varying degrees of disease problems. This paper chooses the typical structure of asphalt concrete as a pavement model, aiming to calculate the stress of subgrade by using BASAR3.0 program, and analyze subgrade workspace depth under heavy axle load. Elastic layered system theory is used to calculate the depth of the roadbed work area under different conditions and typical road structure. Result shows that under the condition of heavy-loaded traffic, it is insufficient for the subgrade workspace with the depth of 0-80cm. In order to ensure steady support the pavement structure, and avoid its serious distortion, the depth of subgrade workspace should be adjusted. It has a certain reference value for the prevention and treatment of diseases of heavy-loaded traffic road.