应用生态学报2011，Vol.22Issue(3)：720-726,7.
高产夏玉米褐斑病产量损失模型及损失机理
Yield loss model and yield-loss mechanism of high-yielding summer maize infected by Physoderma maydis
摘要
Abstract
A total of 21 different disease-grading summer maize groups were formed by fixed-point natural infection of maize brown spot in the field, and mass loss estimation models of single ear mass and 100-grain mass were constructed by stepwise regression with DPS software. The mass loss estimation models of single ear and 100-grain were Y = - 4. 012 + 0. 377X1 - 0. 228X2 + 0. 694X3 -0. 144X4 and Y=-4. 536+0. 173X1+0. 188X2+0. 248X3-0. 034X4, respectively, where Y was yield loss rate, X1 was the disease index at flowering stage, X2 was the disease index at pollination stage, X3 was the disease index at filling stage, and X4 was the disease index at dough stage. The measured relationships between the disease indices at different growth stages and the mass loss for single ear and 100-grain coincided well with the modeling results. Maize brown spot directly affected the net photosynthetic rate of ear height leaf and the activities of RuBP carboxylase and PEP carboxylase. The higher the disease-grade, the lower the net photosynthetic rate and the activities of the two enzymes were.关键词
玉米褐斑病/产量损失/模型构建/光合速率/光合羧化酶分类
农业科技引用本文复制引用
吴淑华,姜兴印,聂乐兴,李俊虎,张吉旺,刘鹏..高产夏玉米褐斑病产量损失模型及损失机理[J].应用生态学报,2011,22(3):720-726,7.基金项目
国家科技支撑计划项目(2007BAD31B04)、山东现代农业产业体系项目和公益性行业(农业)科研究项目(200903003)资助. （2007BAD31B04）
