摘要
为了因地制宜地发展控制灌溉,减少不合理的栽培措施对产量的损失,选定适宜的作物播种期是十分必要的。本研究基于昆山地区控制灌溉水稻田间实测数据对ORYZA v3模型进行校正和检验,进而模拟昆山地区1971—2010年(40年)不同气候条件下控灌水稻的生长情况,根据模型输出的DVS值,分析不同可播期水稻生育期长度、产量等相关因素,最终确定该地区控灌水稻的适宜播种期。模型校正和检验的RMSEn值在9%~26%之间,决定系数R2在0.85~0.99之间,模型具有良好的适用性。根据DVS值,确定多年控制灌溉水稻最早和最晚可播期为3月28日和6月13日,以最高产量为目标选定播种日期为5月23日至6月13日。推荐5月23日至6月3日为苏南地区控制灌溉水稻的适宜播种期。
To develop controlled irrigation in accordance with local conditions and minimize the yield losscaused by unreasonable cultivation measures, it is necessary to select the suitable sowing date for rice. In thisstudy, ORYZA v3 model was calibrated and validated based on the data collected from controlled irrigationrice field experiment in Kunshan, Jiangsu Province, and then the growth of rice was simulated under differentclimatic conditions from 1971 to 2010（40 years） in Kunshan. According to DVS of the model output value, thegrowth period length, yield and some relevant factors of rice in any available sowing stage were analyzed, andfinally the optimum sowing date was selected. The RMSEn value for model calibration and validation was in therange of 9%-26%, and the determination coefficient R2 was 0.85-0.99, which showed that ORYZA v3 modelhad good performance. According to DVS value, the earliest and latest available sowing date for the controlledirrigation rice was determined to be March 28^th and June 13^ th, respectively. To acquire the maximum yield, thesowing date was chosen from May 23^ rd to June 13 th. Taken together, the most suitable sowing date for thecontrolled irrigation rice in southern Jiangsu Province was recommended as from May 23^ rd to June 3^rd.
作者
廖祺
王洁
徐俊增
吕玉平
Liao Qi;Wang Jie;Xu Junzeng;Lv Yuping(School of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098;Rural Water Conservancy Science and Technology Development Center of Jiangsu,Nanjing 210029)
出处
《中国农学通报》
2018年第30期1-6,共6页
Chinese Agricultural Science Bulletin
基金
江苏水利科技项目"水稻灌区高效水肥管理模式研究与示范"(No.2016068)
江苏省研究生培养创新工程项目"不同大气湿度下作物对土壤水分亏缺的生理响应和诊断"(No.2014/B1605330)
