UV-B辐射增加对燕麦产量及其构成因素影响研究  

Effect of Strengthening Solar Ultraviolet B Band Irradiation on Oat (Avena Sativa L.)Yield and Its Components in Qing Tibetan Plateau

作　　者：王生耀[1,2] 王堃[1] 赵永来[2] 辛有俊[2] 

机构地区：[1]中国农业大学动科院草地研究所,北京100094 [2]青海省草原总站,青海西宁810008

出　　处：《光谱学与光谱分析》2009年第8期2236-2239,共4页Spectroscopy and Spectral Analysis

基　　金：国家'973'项目(2007CB106805)资助

摘　　要：在大田条件下通过采用人工UV-B灯管模拟来增加太阳光辐射量5%和10%对燕麦品种-巴燕4号的有关性状的影响进行了研究。结果表明,UV-B辐射增加能显著降低燕麦种子产量,产量下降的主要原因是每穗粒数和单位面积穗数下降,粒重的变化未达到显著水平。比较燕麦同一花位的粒重,UV-B辐射增加导致燕麦粒重显著下降,同时导致粒重较低的高花位籽粒数减少。青藏高原上来自太阳紫外辐射量的增加可能会影响燕麦的繁殖能力。Stratospheric ozone depletion occurs mainly over polar regions during the spring when the solar Ultraviolet B-band （280-315 nm, UV-B） radiation is most intense in a year, but over the Qing Tibetan Plateau region, the highest intensity is from June to September when the amount of UV-B radiation reaching the regions is more than that in the adjacent areas lying in the same latitude by 10%. From June to September is just the time of plant＇s germination, development, and reproduction in the alpine region. UV-B radiation may alter the reproduction of the forage plant, oat （Avena sativa. ）, which plays the vital role in developing indigenous herdsman＇ s animal husbandry industry. The responses of oat yield and its components to the enhanced ultraviolet B band irradiation under the field condition were surveyed. The effect shows that the grain yield is decreased significantly by strengthened UV-B irradiation, and at the same time the main consequence is the decrease in both the number of ears per square meter and the number of grains per ear, but the weight of 1 000 grains appears not significantly different. Compared with the same respective location in a spikelet, the grain weight is decreased significantly under the treated condition, mostly because of the decreases in the number of the third and forth floret grain and the grain weight at those respective positions, and the percentage of the first and second floret grain and their weight are evidently approved on the contrary.

关 键 词：UV—B辐射 燕麦 花位 粒重 

分 类 号：O657.3[理学—分析化学]