Characteristics of nutrition allocation of Seriphidium transiliense under grazing condition

In order to understand resources allocation pattern of Seriphidium transiliense under grazing condition, the content and storage allocation of carbon, nitrogen, phosphorus and potassium of roots, stems, leaves and flowers (or seeds) were measured. The results showed that the phosphorus content of roots, the nitrogen, phosphorus, potassium and carbon content of flowers or seeds decreased under grazing condition and the other nutrition content changed complicatedly without regular pattern. It proved that grazing contribute to potassium and carbon accumulation allocation of S.transiliense. The rates of potassium and carbon accumulation allocation in roots increased by 3.16%～12.79% and 2.12%～12.74%, respectively. The rates of potassium accumulation allocation decreased in stems, leaves and flowers (seeds) by 1.67%～14.13%, 1.49%～2.89% and 0.33%～0.41%, respectively. The rates of the carbon reserve allocation decreased in stems, leaves and flowers (seeds) by 6.45%～11.37%, 0.77%～4.18% and 0.01%～0.09%, respectively. During vegetative period and flowering stage, the nitrogen accumulation allocation of S.transiliense in root increased by 11.91%～18.45% and that in leaves and flowers (seeds) decreased by 8%～14.58% and 1.78%～4.76%, respectively. The phosphorus accumulation allocation had no relationship with grazing.