Using comparative analysis and substituting temporal serial with spatial serial data

we analyzed data collected from abandoned farmland with eight different vegetation restoration periods (1 to 35 years). The responses of plant community and soil stoichiometry to different fertilization treatments were studied. The results were as follows: (1) Compared with the no fertilization treatment

the aboveground biomass was increased by 77.1% and 142% by the + N and + N + P treatment

respectively. The response of aboveground biomass to the + N + P treatment was more significant than to the + N treatments. Compared with no fertilization treatments

leaf N and P concentration was increased by 13.6% and 0.6%

while the N/P ratio was reduced by 3.8% by the + N treatment. Leaf N and P concentration was increased by 15.6% and 8.7%

while the N/P ratio was reduced by 15.2% by the + N+ P treatment. The responses of leaf N and P concentration

and N/P ratio to the + N+ P treatment were all more significant than to the + N treatment. Compared with the no fertilization treatment

soil N and P content was increased by 27.7% and 36.2%

respectively

and N/P ratio was reduced by 9.1% by the + N treatment. Soil N and P content was increased by 16.6% and 25%

respectively

and N/P ration was reduced by 9.1% by the + N+ P treatment. The response of soil N and P content to the +N treatment were more significant than to the + N+ P treatment. In conclusion

a proper fertilization mode is beneficial to the utilization and distribution of soil nutrients.