| 臭氧胁迫对冬小麦干物质生产和产量构成的影响 |
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| 引用本文： | 郑有飞,刘瑞娜,吴荣军,赵泽,胡程达,张金恩,王连喜.臭氧胁迫对冬小麦干物质生产和产量构成的影响[J].农业环境科学学报,2010,29(3). |
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| 作者姓名： | 郑有飞 刘瑞娜 吴荣军 赵泽 胡程达 张金恩 王连喜 |
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| 作者单位： | 1. 江苏省气象灾害重点试验室,南京210044;南京信息工程大学环境科学与工程学院,南京,210044
2. 南京信息工程大学环境科学与工程学院,南京,210044 |
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| 基金项目： | 国家自然科学基金项目(40775072);;江苏省高校自然科学研究重大项目(09KJA170004);;中国气象局农业气象保障与应用技术重点开放实验室开放基金项目(AMF200904);;南京信息工程大学科研基金(90215) |
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| 摘 要： | 利用开顶式气室(OTC)开展了大田实验条件下地表臭氧浓度增加对冬小麦干物质(DM)生产和产量构成的影响。结果表明,与对照组相比,100nL·L-1臭氧熏气下干物质量略有降低,150nL·L-1臭氧熏气下显著降低;100nL·L-1和150nL·L-1臭氧熏气下叶面积,净同化速率(NAR)变化规律不明显;100nL·L-1和150nL·L-1臭氧熏气都使抽穗期的叶/总干重增加,根/总干重下降,抽穗后根/总干重上升,而成熟期的各器官干重分配均没有达到显著性水平;100nL·L-1臭氧熏气使单位面积穗数和空秕率显著降低,150nL·L-1臭氧熏气使空秕率、单位面积穗数、穗粒数、穗粒重出现了显著或极显著降低,臭氧熏气对千粒重没有显著性变化。以上结果表明,NAR是影响干物质累积速度的关键因子,在不同生育阶段,通过干物质的分配,对小麦生长发育起关键作用的器官在一定程度上能够抵抗臭氧对其的损害。臭氧通过影响粒数和粒重使冬小麦减产。
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| 关 键 词： | 干物质量 干物质分配 叶面积 产量 产量评估 |
Effects of Ozone Stress on Dry Matter Production and Yield Components in Winter Wheat |
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| ZHENG You-fei,LIU Rui-na,WU Rong-jun,ZHAO Ze,HU Cheng-da,ZHANG Jin-en,WANG Lian-xi.Effects of Ozone Stress on Dry Matter Production and Yield Components in Winter Wheat[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2010,29(3). |
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| Authors: | ZHENG You-fei LIU Rui-na WU Rong-jun ZHAO Ze HU Cheng-da ZHANG Jin-en WANG Lian-xi |
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| Affiliation: | 1.Jiangsu Key Laboratory for Meteorological Disasters/a>;Nanjing 210044/a>;China/a>;2.College of Environmental Science and Engineering/a>;Nan-jing University of Information Science & Technology/a>;China |
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| Abstract: | Effects of increased surface ozone concentration upon the dry matter formation and yield components of winter wheat grown in fields were investigated by using an OTC(Open Top Chamber)technique,leading to a slight(pronounced)reduction of dry matter production under the smoking from 100(150)nL·L~(-1) ozone,compared to CK.In both cases the vailations in leaf area and net assimilation rate(NAR)showed no significant feature,but the ratio of dry leaf (root)weight to total dry weight increase(declines)in the heading stage and thereafter the root-total dry weight ratio rised.In the mature phase the dry weight distributed among organs failed to pass significance tests.Under thetreatment of 100nL·L~(-1) the number of ears and percentage of blighted grains per unit area reduced greatly whereas in the treatment of 150nL· L~(-1) the empty-grains percentage,number of ears per unit area as well as the weight per 1 000 grains reduced considerably or even highly con-spicuously,with no marked effect on the weight of 1 000 grains.The above evidence indicated that NAB Was the key factor of the accumulation of dry matter and through the distribution of dry matter in the various growth/development stages,the organs could resist to ozone threat to some extent.Ozone was responsible for yield decline by diminishing the number of grains per ear and weight per 1000 seeds. |
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| Keywords: | weight of dry matter distribution of dry matter leaf area yield the assessment of yield |
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