田间可调式UV-B辐射增强对籼型杂交稻“协优432”生长及产量的影响  

Effects of Modulated Uv-b Supplementation on the Growth and Yield of Rice (Oryza sativa L.) in Fields

作　　者：李海涛[1] 廖迎春[1] 董铭[2] 梁涛[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101 [2]北京林业大学,北京100083

出　　处：《中国农学通报》2006年第6期349-355,共7页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金"B区紫外线增强对红壤丘陵区水稻品种的生理生态学效应"(30170152);中国科学院地理科学与资源研究所知识创新工程领域前沿项目"UVB辐射对我国南方水稻产量;品质的影响及相关生理学机制的研究"(CXIOG-C02-01)资助。

摘　　要：在大田栽培条件下,研究了采用可调式UV-B辐射增强自动控制系统对晚稻品种“协优432”生长发育及产量的影响。结果表明,UV-B辐射增强对该水稻品种光合及产量的影响不显著,具体表现在:(1)叶绿素a、叶绿素b在分蘖期分别上升4.60%和8.37%;拔节期叶绿素a下降3.20%,叶绿素b上升0.20%;孕穗期叶绿素a、叶绿素b上升2.57%和1.52%;(2)最大光合速率在拔节期和孕穗期分别上升1.38%和下降1.29%;(3)孕穗期叶绿素荧光参数PSII效率(PhiPS2)、电子传递效率(ETR)和光化学猝灭系数(qP)上升幅度为10.22%、10.22%、10.21%;(4)株高在分蘖期上升0.18%;拔节期上升0.87%;孕穗期上升3.90%;成熟期上升0.14%;(5)水稻成熟后,经UV-B辐射的水稻平均穗长增加了0.16%,每穗穗粒重、每株有效穗数、千粒重分别下降了0.35%、3.02%、1.23%。以上指标和自然日光UV-B辐射组进行方差分析,差异均不显著。We investigated responses of growth and grain yield to increased exposure to UV-B （280-320nm） radiation of rice （Oryza sativa L.） ＂Xieyou 432＂ using a modulated UV-B supplementation system under field conditions. Our study showed that enhanced UV-B had little effects on the growth and yield of rice. The results are as follows： （1） Under enhanced UV-B conditions, contents of chlorophyll a, b increased by 4.60% and 8.37% during tillering stage; during jointing stage, chlorophyll a content decreased by 3.20% while chlorophyll b increased by 0.20%; during booting stage, contents of chlorophyll a, b increased by 2.57% and 1.52%; （2） maximum photosynthetic rate increased by 1.38% during jointing stage and decreased by 1.29% during booting stage; （3） kinetics parameters of PSII efficiency （PhiPS2）, electron transport rate （ETR） and photochemical quenching （qP） increased by 10.22%, 10.22%, 10.21% during booting stage; （4） rice height increased by 0.18%, 0.87%, 3.90% and 0.14% during tillering stage, .jointing stage, booting stage and ripening stage; （5） panicle length increased by 0.16%; total grain weight per panicle, effective panicle per plant and 1000-grain weight decreased by 0.35%, 3.02% and 1.23%. All the indices are not signifi cant compared to the indices of the rice grown under ambient UV-B irradiance conditions.

关 键 词：大田条件 可调式控制系统 UV-B辐射增强 水稻 

分 类 号：S511[农业科学—作物学]