Impacts of climate change on winter wheat net primary production: the regulatory role of crop management

Abstract

BackgroundThe Huang–Huai–Hai Plain (3HP) is the main agricultural area in China. Although climate change (CC) and crop management (CM) are considered factors affecting the winter wheat net primary production (NPP) in this region, their effects remain unclear. In this study, we evaluated the relative contributions of CC and CM to winter wheat aboveground NPP (ANPP) in the 3HP and the relationships between climatic factors therein and ANPP by using the first‐order difference method from 2000 to 2020.ResultsCM had a greater influence on the ANPP of winter wheat than did CC. However, the relative contribution of CM to ANPP gradually decreased in humid and dry sub‐humid regions with the development of winter wheat. Furthermore, in areas characterized by low temperatures and limited precipitation, CC became the dominant factor contributing to ANPP, indicating that varieties resilient to drought and cold should be selected in these regions. Minimum and average temperatures were the dominant factors driving spatiotemporal variations in ANPP during the early stage of winter wheat growth, whereas maximum temperature constrained growth throughout the winter wheat growth cycle. When winter wheat entered the vigorous growth stage, precipitation and solar radiation replaced temperature as the driving factors influencing winter wheat growth.ConclusionOur results provide guidance for optimizing winter wheat crop management in the 3HP.This article is protected by copyright. All rights reserved.

Study of Regional Spatial and Temporal Changes of Net Ecosystem Productivity of Crops from Remotely Sensed Data

“…Most of the current research on the NEP focuses on natural ecosystems such as forests and grasslands, or on surface terrestrial ecosystems as a whole, with few crop-specific analyses [9,[11][12][13][14]. Research on crops currently prioritizes the estimation of the crop NPP and crop yield [15][16][17][18]. However, there are few studies further estimating the regional-scale NEP and the spatial and temporal variation characteristics of cropland, investigating the connection between carbon source/sink status and agricultural activities, and the relationship between the NEP and impact factors, leaving us with a limited understanding of that process.…”