Abstract: Conducting research on the resource utilization and feeding of reeds is of great significance for the rational development and utilization of localized feed resources, increasing local livestock and poultry production capacity, solving the problem of feed shortage for ruminant animals, and developing the breeding industry. To explore the changes in agronomic traits, yield, and nutritional composition of reeds at different growth stages, and to analyze and determine the optimal harvesting time using fresh reed grass as silage material, this experimental study was conducted. The results showed that the growth of reeds from the late growth stage to the booting stage was vigorous, with a significant increase in yield. There were more fresh green leaves and balanced various nutrient contents. Therefore, it is recommended to cut reeds from early July to early August, that is from the late growth stage to the booting stage, as feed materials for silage processing and modulation. The stubble height during reed cutting should be greater than 4 cm. At the same time, it is recommended to further carry out research on the processing and utilization technology of reed feed, so as to provide effective technical support for the utilization of reed feed and the development of grain saving animal husbandry.

Key words: reed, childbearing period, agronomic traits, yield, nutrient composition