作物学报 ACTA AGRONOMICA SINICA 2014, 40(10): 1776-1786
ISSN 0496-3490; CODEN TSHPA9
http://zwxb.chinacrops.org/
E-mail: xbzw@chinajournal.net.cn DOI: 10.3724/SP.J.1006.2014.01776
基于Richards扩展方程提取水稻灌浆结实光温特性参数
杨沈斌1,2 江晓东2 王应平3 申双和1 石春林4 王萌萌2 陈 斐2
1
2
南京信息工程大学气象灾害预报预警与评估协同创新中心 / 江苏省农业气象重点实验室, 江苏南京 210044; 南京信息工程大学应
3
用气象学院, 江苏南京 210044; CSIRO Marine and Atmospheric Research, PMB # 1, Aspendale, Victoria 3195, Australia; 4江苏省农业科学院, 江苏南京 210014
摘 要: 以籼型两系杂交稻陵两优268和两优培九为材料, 进行了为期2年(2012—2013)的大田分期播种试验, 每年分7期播种, 旨在研究水稻灌浆期光温要素对籽粒灌浆结实的影响, 并提取与此有关的光温特性参数。因此, 以Richards方程拟合观测数据得到的平均灌浆速率为纽带, 通过引入光温订正方程, 建立Richards扩展方程。结合全局优化算法SCE-UA (Shuffled Complex Evolution Algorithm), 优化方程参数, 估算2个品种灌浆结实的光温特征参数和响应曲线。结果显示, 光照主要通过影响籽粒最终重量而间接作用于平均灌浆速率, 温度则通过影响灌浆进程的快慢作用于平均灌浆速率。陵两优268灌浆结实期的光照阈值(R0)、最低(Tmin)、最高(Tmax)和最适温度(Top)分别为18.94 MJ m-2 d-1、6.81℃、33.29℃和30.28℃; 两优培九上述参数分别为21.71 MJ m-2 d-1、6.10℃、33.74℃和24.16℃。形成的光照和温度响应曲线, 能够较好地反映两品种平均灌浆速率对光温条件的响应差异, 其中陵两优268平均灌浆速率表现为“温度敏感型”, 而两优培九表现为“光照敏感型”。本文运用数学模型方法定量分析和比较了光温要素对有效灌浆期内平均灌浆速率的影响, 其方法和结论为建立相应的农业气象指标, 评估气候资源对水稻产量的影响提供了重要参考依据。
关键词: 水稻; 灌浆结实期; 光温环境; 数学模型; 参数优化
Charactering Light and Temperature Effects on Rice Grain Filling Using Ex-tended Richards’ Equation
YANG Shen-Bin1,2, JIANG Xiao-Dong2, WANG Ying-Ping3, SHEN Shuang-He1, SHI Chun-Lin4, WANG Meng-Meng2, and CHEN Fei2
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 College of Applied Meteorology, Nanjing University of Informa-tion Science and Technology, Nanjing 210044, China; 3 CSIRO Marine and Atmospheric Research, PMB # 1, Aspendale, Victoria 3195, Australia;
4
Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Abstract: Richards equation has been widely used to simulate rice grain filling rates, but the lack of capability to relate environ-mental factors in its simulation impedes the application of Richards’ equation in evaluating the impact of adverse climate on grain filling process. Therefore, a mathematical modeling method, together with two-year filed-seeding experiment (2012-2013) data, was used in this paper to examine the feasibility of an extended Richards’ equation on this issue. The two-year experiment was carried out in Nanjing with two indica two-line hybrid rice cultivars, Lingliangyou 268 and Liangyoupeijiu. On the basis of the observations, Richards equation was first used to estimate rice grain filling parameters and calculate mean grain filling rate in each effective grain filling period. Subsequently, a radiation and temperature correction function was introduced into the Richards’ equation to form an extended equation by linking the mean grain filling rates to daily radiation and mean temperature observations. A set of radiation and temperature characteristic parameters were included in the correction function, which theoretically reflect the response of mean grain filling rates to the change of temperature and radiation conditions and form response curves for the two tested varieties. To estimate these parameters, we applied the Shuffled Complex Evolution (SCE-UA) global optimization algo-
本研究由国家公益性行业(气象)科研专项(GYHY201306035, GYHY201306036, GYHY201206020), 国家“十二五”科技支撑计划项目(2011BAD32B01)和江苏高校优势学科建设工程项目(PAPD)资助。 第一作者联系方式: E-mail: jaasyang@163.com, Tel: 025-58731165
Received(收稿日期): 2014-04-09; Accepted(接受日期): 2014-07-06; Published online(网络出版日期): 2014-07-23. URL: http://www.cnki.net/kcms/detail/11.1809.S.20140723.1035.005.html
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