Study On The Dynamic Law Of Nutrient Accumulation Of Rhizome Grass

Using the field experiment, chemical analysis and biological statistic methods, the dry matter and nutrient substance accumulative law was systematically studied with Leymus chinense, Leymus dasystachys, Leymus racemosus and Thinopyrum intermedium. During germination to fruit, the contents of nutrient substance that is crude protein, crude fat, reducing sugar, N, P, K, 5, Ca, Mg, Fe, Mn, Cu, and Zn were made clearly. And the dry mater and nutrient substance accumulation per area of the part on ground and underground (0-20cm) were also made clearly, and established their mathematical models, and known the maximum accumulation, the fastest accumulative speed and their appearing time were made clearly. It provided the scientific basis for high yield of Rhizome grass, high quality cultivation and defining the best harvest time.