A spatiotemporal analysis of extreme agrometeorological events during selected growth stages of maize ( Zea mays L.) fro
- PDF / 1,997,388 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 1 Downloads / 182 Views
ORIGINAL PAPER
A spatiotemporal analysis of extreme agrometeorological events during selected growth stages of maize (Zea mays L.) from 1960 to 2017 in Northeast China Fangliang Zhang 1 & Xiaoguang Yang 1
&
Shuang Sun 1 & Jiqing Gao 1 & Zhijuan Liu 1 & Zhentao Zhang 1 & Tao Liu 1
Received: 7 April 2020 / Accepted: 10 November 2020 # Springer-Verlag GmbH Austria, part of Springer Nature 2020
Abstract Against the background of global warming, extreme agrometeorological events have become more intense and frequent during the growing season of maize (Zea mays L.). In this study, we focused on the five types of extreme agrometeorological events that greatly affect maize production in Northeast China, including chilling injury, drought, rainstorm, frost, and gale. We averaged the actual timing of phenological events from the study agrometeorological stations and divided the maize growing season into four growth stages: emergence—jointing, jointing—flowering, flowering—kernel milk, and kernel milk—physiological maturity. Based on the historical weather data from 1960 to 2017 in the study region, we derived the values of pertinent indices for the five types of study extreme agrometeorological events during the four selected maize growth stages. The results showed that chilling injury and drought were relatively more frequent during the four growth stages of maize from 1960 to 2017 in the Northeast China. As time goes on during the growing season of maize, the spatial coverage of chilling injury, frost, and gale all showed a decreasing trend. By contrast, the spatial coverage of drought showed an increasing trend during the study growth stages of maize. During growth stages of maize, chilling injury was the main extreme agrometeorological event before the 2000s, while drought became the main extreme agrometeorological event after the 2000s. Identifying the main extreme climate events that could cause yield loss is imperative, and it is important for farmers to acknowledge ongoing changes in these extreme climate events in order to take preventive measures if necessary.
1 Introduction Maize (Zea mays L.) is one of the leading cereal crops around the world. Maize grains can be consumed as staple diet, drug material, or ethanol fuel. In Northeast China, maize is the largest food crop, and maize production plays an important role in the regional agricultural economy. In 2017, the maizegrowing area was 1.3 × 104 ha in Northeast China, and the yield was 8.7 × 1010 kg (National Bureau of Statistics of China 2018). From 1961 to 2010, the county-level average maize yield ranged from 3000 to 7000 kg/ha in Northeast China, with an annual increasing rate of 70–290 kg/ha (Yin et al. 2016). Climate change is a well-known fact, relating to a greater incidence of extreme weather events worldwide since
* Xiaoguang Yang [email protected] 1
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
the 1950s (Pais et al. 2020) and increasingly negative consequences to agriculture and quality
Data Loading...
