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本文对日本引入的９个冷地型鸭茅品种的营养动态进行了研究。其结果表明，９个鸭茅品种的粗蛋白质含量随生育期的进展逐渐下降，以抽穗期下降的速度为快；而粗纤维的含量变化恰好相反，随生育期的推移而逐渐增加，抽穗期的粗纤维含量明显增高；粗灰分的含量变化亦呈下降趋势，但下降幅度不大。鸭茅营养物质变化的转折点是在抽穗期
In this paper, the nutrient dynamics of nine cold-adapted Chinese cedar cultivars introduced in Japan were studied. The results showed that the crude protein content of 9 samples of Dactylis glomerata decreased gradually with the progress of the growth period and decreased rapidly at the heading stage. However, the changes of the crude fiber contents were opposite, and gradually increased with the growth period. The heading stage Of the crude fiber content was significantly increased; crude ash content also showed a downward trend, but the decline was not significant. The turning point for the changes in the nutrient content of the hedgehog is at the heading stage