Effects of different cutting treatments on dynamic growth of Sorghum sudanense (HayKing) individual plants in AridHot Zone

A mowing height growth linear model was established in the present paper. Based on the model, the relationship between growth status of individual plants, including dynamic changes of individual plant height, tillering and per unit yield, and total biomass of Sorghum sudanense (HayKing) with different cutting treatments was analyzed. The results showed that unit yields of monocropping grassland of S.sudanense (HayKing) with different cutting treatments were stable in its growth cycle. There was a significant negative correlation between plant individual growth rate and growth potential under different cutting treatments. These results indicated that the monocropping grassland of S.sudanense (HayKing) has ability to maintain unit yields with a certain stability during its life span through balancing the relationship between the growth rate and the growing potential of individuals.