灌浆期弱光逆境对小麦干物质生产和产量影响的模拟模型

顾蕴倩; 刘雪; 张巍; 亓春杰; 汤开磊; 赵杨; 张岩; 李刚; 王斌; 戴剑锋; 罗卫红

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灌浆期弱光逆境对小麦干物质生产和产量影响的模拟模型

首发时间：2012-10-02

顾蕴倩 ¹
顾蕴倩，（1987-），女，研究方向为作物系统模拟。
刘雪 ¹ 张巍 ¹ 亓春杰 ¹ 汤开磊 ¹ 赵杨 ¹ 张岩 ¹ 李刚 ¹ 王斌 ¹ 戴剑锋 ¹ 罗卫红 ¹
罗卫红（1962-），女，教授，主要从事作物系统模拟，设施农业环境模拟与调控研究：

1、南京农业大学农学院，南京 210095

摘要：以弱筋小麦品种扬麦15号、扬麦13号和宁麦9号为试验材料，通过在灌浆期设定不同强度和持续时间的遮阴处理试验，模拟连阴雨天气诱发的弱光逆境对小麦干物质生产和产量的影响。在定量分析试验数据的基础上，确定基于光温指标的弱光对小麦干物质生产和产量的影响影响因子的计算方法，将上述影响因子计算公式与SUCROS模型结合，建立灌浆期弱光逆境对小麦干物质生产和产量影响的模拟模型，并用独立的试验资料对模型进行检验。试验数据的分析结果表明，灌浆期对小麦干物质生产和籽粒产量产生显著影响的临界遮阴阈值为：遮阴程度50%~66%且持续时间4天，或遮阴程度66%~84%且持续时间2天。用独立的试验资料对模型进行检验的结果表明，模型对小麦干物质生产和产量的模拟值与实测值基于1:1线的决定系数（r2）分别为0.97和0.96，相对均方根差（rRMSE）分别为2.89%和4.82%。本研究建立的模型可以较好地模拟不同程度和持续时间的弱光逆境对小麦干物质生产和产量的影响，从而为评估全球气候变化背景下弱光天气事件对小麦生产的影响提供了模型工具。

关键词：小麦弱光逆境干物质生产产量模型

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Quantifying the effects of solar radiation diminishing during milk filling stage on biomass production and grain yield of wheat

GU Yunqian ¹
顾蕴倩，（1987-），女，研究方向为作物系统模拟。
LIU Xue ² ZHANG Wei ² QI Chunjie ² TANG Kailei ² ZHAO Yang ² ZHANG Yan ² LI Gang ² WANG Bin ² DAI Jianfeng ² LUO Weihong ²
罗卫红（1962-），女，教授，主要从事作物系统模拟，设施农业环境模拟与调控研究：

1、College of Agriculture, Nanjing Agricultural University, NanJing 210095
2、College of Agriculture, Nanjing Agricultural University, Nanjing 210095

Abstract：Field experiments with three weak gluten winter wheat (Triticum aesivum L.) cultivars Yangmai 15, Yangmai 13 and Ningmai 9 were conducted during three growing seasons. Shading treatments with four shading levels (CK, 50%, 66% and 84%) and four duration (2d, 4d, 6d and 8d) during milk filling stage in the three grown seasons were designed to simulate the solar radiation diminishing caused by cloudy or rainy weather conditions. Based on the experimental data, the impacts of different levels and durations of shading on wheat biomass production and grain yield were quantitative analyzed, and the impact factors of solar radiation diminishing on harvest index, as functions of photo-thermal index (PTI), were determined. These functions were then integrated with the SUCROS model to develop a dynamic model for predicting the effects of solar radiation diminishing during milk filling stage on the biomass production and grain yield of wheat. Independent experimental data were used to validate the model. Based on the experimental data, the critical levels and durations of shading were determined as 50%~66% and 4d, 66%~84% and 2d for biomass production and grain yield. Model tests using independent experimental data results showed that the determination cofficient (r2) between the predicted and measured values of total biomass production and grain yield were 0.97 and 0.96, respectively, and the relative root mean squared errors (rRMSE) were 2.89% and 4.82%, respectively. The model developed in this study gave satisfactory predictions of the impacts of solar radiation diminishing during milk filling stage on wheat biomass production and grain yield, hence, can be used for assessing the impact of solar radiation diminishing caused by cloudy or rainy weather conditions on wheat production.

Keywords： wheat solar radiation diminishing biomass production grain yield model

基金：

1. 高校博士点基金（20090097120018）

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顾蕴倩，刘雪，张巍，等. 灌浆期弱光逆境对小麦干物质生产和产量影响的模拟模型[EB/OL]. 北京：中国科技论文在线 [2012-10-02]. https://www.paper.edu.cn/releasepaper/content/201210-7.

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论文编号	201210-7
论文题目	灌浆期弱光逆境对小麦干物质生产和产量影响的模拟模型
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