Effects of Drought on Vegetation Productivity of Farmland Ecosystems in the Drylands of Northern China

Previous research on the effects of drought vegetation productivity seldom distinguished different responses ecosystems to under management practices and land use systems. Studies investigating whether irrigation can buffer negative impacts usually used discontinuous yield data in distribution. In this study, trends farmlands drylands northern China (DNC) from 2000 2018 were studied using self-calibrated Palmer severity index (scPDSI) enhanced (EVI). The differences impact irrigated farmland, rainfed natural areas quantified. results showed that growing season scPDSI EVI an increasing trend 2018. Significant correlations between anomalies found both arid semi-arid drylands. addition, mitigated 59.66% caused by farmland season. was 19.98% lower than EVI. 49.59% study refine response patterns.