Chinese Journal of Agrometeorology ›› 2017, Vol. 38 ›› Issue (08): 507-516.doi: 10.3969/j.issn.1000-6362.2017.08.005

Previous Articles     Next Articles

Estimating the Last Date without Sterile-type Chilling Injury for Rice Based on a Model for Evaluation of Loss for Sterile-Type Chilling Injury in Northeast China

CHEN De, YANG Shen-bin, JIANG Li-xia, XU Hao, LI Xiu-feng, HUANG Wei   

  1. 1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2. Weather Station for 94592 PLA Troops, Xuzhou 221008; 3. Heilongjiang Provincial Institute of Meteorological Science, Harbin 150030; 4. China Meteorological Administration, Beijing 100081
  • Received:2016-12-22 Online:2017-08-20 Published:2017-08-15

Abstract: With the meteorological data and rice phenological records from 35 weather stations during 1981 to 2012, daily empty grain rates of rice were estimated by the model of evaluation and forecast of loss for sterile-type cool injury in rice plants. Three parameters were set to represent rice varieties with three types of cold tolerance. The date with empty grain rate estimated up to physiological empty grain rate (7.62%) was chosen as the last date without sterile-type cool injury for rice (NSCI). For each station, NSCI was estimated with 80% of guarantee rate. The results showed NSCI advances with latitudes. The NSCIs for rice with weak, normal and strong cold tolerance in Heilongjiang Province were on 14, 17 and 22 July respectively, while in Jilin Province they were on 18, 21 and 25 July respectively, and on July 28th, August 4th, August 10th, respectively in Liaoning Province. In recent 30 years, the temporal variation of NSCI in northeast China was evident, which showed a deferred trend during 2001 to 2012 in some area of northeast China. Comparison of chilling injuries during 30 days before and after NSCIs with that during 30 days before and after observed heading dates showed that the method used in this study is able to estimate NSCIs for rice in northeast China with enough accuracy, which can effectively help agricultural management prevent and mitigate chilling damage in rice key development stage.

Key words: Japonica rice, Empty grain rate, Phenology, Chilling injury