Effect of Drought in July-August 2022 on Vegetation Growth in West Sichuan Plateau
Climate change is an important factor affecting vegetation growth,in order to understand the impact of drought on vegeta-tion growth,this study analyzed the impact of drought on vegetation growth in West Sichuan Plateau based on the climatic conditions,ve-getation index of Net Primary Productivity(NPP)and Normalized Difference Vegetation Index(NDVI)and forage yield data from July to August 2022.The results showed that the NPP index responded to drought in a timely manner,the NPP index of 62.50%of area in July was lower than that in the historical period,and the NPP index in August and September continuously decreased,the NPP index of 80.83%of the area was lower in September than that in the historical period.The response of NDVI index to drought was obviously lagging be-hind,with a slight decrease in July and August,and a significant decrease in September.The NDVI index of 58.10%area was lower than that of the same period in history.The yield of forage decreased obviously.Compared with the previous two years,the grass yield from Ju-ly to September decreased by more than 5%.Temperature and precipitation had different effects on various vegetation indexes.
NETL
NSTL
万方数据
