Detecting responses of masson pine to acid rain based on different soil conditions

To detect responses of masson pine to the acid rain based on different soil conditions, monthly average pH and NDVI were obtained from precipitation acidity and GIMMS/NDVI data from 1992 to 2006 in China based on both acidity levels and soil critical load of acid deposition, then used to analyze inter-annual variation by the improved sinusoidal fitting and linear regression analysis. Our results showed that at severe and slight acidity level, the moderate soil condition was most beneficial to the growth of masson pine, followed by the well soil condition. At moderate acidity level, the worse soil condition was more unfavorable to the growth of masson pine. The multi-year monthly average NDVI showed neither significant difference between poor and moderate soil condition nor between moderate and well soil condition, while the significant difference of the NDVI value between poor and well soil condition in the whole year except in summer.