Abstract: 【Objective】 The effects of adding high temperature period compost on the degradation of organic components and enzyme activity of sheep manure composting in Qinghai Tibet plateau were studied.【Method】 In Qinghai Tibet plateau,sheep manure composting in high temperature period was added to the mixture of sheep manure and rape straw.Taking no high temperature period compost as the control,a 28 day strip compost experiment was carried out.By measuring the composting temperature,pH,total organic carbon,total nitrogen,ammonium nitrogen,nitrate nitrogen,seed germination index,organic matter,lignocellulose and other indexes as well as various enzyme activities in the composting process,the effect of high temperature composting on the fermentation quality of sheep manure composting in Qinghai Tibet plateau was judged.【Result】 The addition of high temperature period compost could promote the temperature rise of the reactor,increased the maximum temperature of the reactor,and prolonged the high temperature period of the reactor for 6 days.At the end of composting,compared with the control group,adding high temperature period compost could significantly reduce NH₄⁺-N/NO₃^--N,E₄/E₆ and C/N value (P＜0.05).It could significantly improve the germination index of compost seeds (P＜0.05).The degradation rates of organic matter,hemicellulose,cellulose and lignin were significantly increased (P＜0.05).It could significantly improve the activities of the protein enzyme,urease,sucrase,cellulase β-glucosidase,peroxidase and polyphenol oxidase (P＜0.05).【Conclusion】 The studies indicated that adding high temperature period compost in sheep manure composting could improve the fermentation quality and enzyme activity of compost,and could significantly shorten the composting time on the Qinghai Tibet Plateau.

Key words: high temperature period compost; sheep manure composting; enzyme activity; Qinghai Tibet plateau