Effects of Soaking Cultivated Rice Seeds with Fulvic Acid on Physiological and Ecological Properties of Weedy Rice  

黄腐植酸浸种栽培稻对杂草稻生理生态特性的影响（英文）

作　　者：王晓琳[1] 尹书剑 张卓亚[2] 张勇 李贵[1] 

机构地区：[1]江苏省农业科学院植物保护研究所,江苏南京210014 [2]南京农业大学生命科学学院,江苏南京210095 [3]安徽农业科学院植物保护与农产品质量安全研究所,安徽合肥230031

出　　处：《Agricultural Science & Technology》2014年第11期1833-1837,1856,共6页农业科学与技术（英文版）

基　　金：Supported by Special Fund for Agro-scientific Research in the Public Interest(201303022);National "Twelfth Five-year" Plan for Science & Technology Support Development Program of China(2012BAD19B02);Key Programs for Science and Technology Development of Anhui Province(1301032001)~~

摘　　要：[Objective] This study aimed to investigate the effects of soaking cultivated rice seeds with fulvic acid （FA） on physiological and ecological properties of weedy rice in the direct seeding cultivated rice field. [Method] Weedy rice JS-Y1 and culti-vated rice Nanjing 44 were used as experimental materials for field plot trials to an-alyze the effects of soaking cultivated rice seeds with 0 （water as control）, 4, 6, 8 g/L FA on til ering dynamics, plant height, chlorophyl content, photosynthetic perfor-mance, gas exchange parameters and yield components of weedy rice at different growth stages. [Result] Among the 4 plants/m2 weedy rice plots, with the increase of FA concentration, til er number, plant height, chlorophyl content, net photosynthetic rate （Pn）, stomatal conductance （Gs） and transpiration rate （Tr） of weedy rice were reduced. Under the 4-6 g/L FA concentration, til er numbers of weedy rice at differ-ent growth stages were reduced by 13.84%-35.71% compared with control at the same density and the most significant reduction was on the 22nd d after weedy rice germination; chlorophyl contents of weedy rice at the jointing stage were significant-ly reduced by 7.90%-8.88%. Furthermore, in the plots with 4 g/L FA, weedy rice plant heights at the heading stage and grain fil ing stage were significantly reduced by 6.37%-9.10%; Pn, Gs and Tr of weedy rice at the jointing stage and grain fil ing stage were significantly reduced by 10.19%-16.05%, 12.57%-23.33% and 10.28%-19.76%, respectively; 1 000-grain weight, effective panicle number per plant and panicles weight per plant of weedy rice at the maturity stage were significantly re-duced by 3.19%, 21.21% and 27.27%, correspondingly. [Conclusion] In 4 plants/m2 weedy rice plots, because soaking cultivated rice seeds with 4 g/L FA could regu-late the growth and development of cultivated rice, the soaking with FA could change the ecological relationship between cultivated rice and weedy rice, affect weedy rice physiological and ecological proper[目的]研究黄腐植酸浸种栽培稻对杂草稻生理生态特性的影响。[方法]以栽培稻南粳44和杂草稻 JS-Y1为材料，通过田间小区试验研究浓度分别为0（清水对照）、4、6、8 g/L黄腐植酸（Fulvic Acid，FA）浸种栽培稻对不同时期杂草稻分蘖动态、株高、叶绿素含量、光合性能、气体交换参数及产量的影响。[结果]4株/m2杂草稻密度下，随着黄腐植酸浸种浓度上升，杂草稻分蘖数、株高、叶绿素含量、净光合速率（Pn）、气孔导度（Gs）和蒸腾速率（Tr）呈降低趋势，其中4~6 g/L黄腐植酸浸种浓度下，不同时期杂草稻分蘖数较同密度下降13.84%~35.71%，杂草稻萌发后22 d下降幅度最为显著，拔节期杂草稻叶绿素显著下降7.90%-8.88%。而且在4 g/L黄腐植酸浸种浓度下，抽穗期和灌浆期杂草稻株高显著下降6.37%~9.10%；拔节期和抽穗期杂草稻净光合速率、气孔导度和蒸腾速率分别显著下降10.19%~16.05%、12.57%~23.33%和10.28%~19.76%；成熟期杂草稻千粒重、每株有效穗数、单株产量分别显著下降3.19%、21.21%和27.27%。[结论]4株/m2杂草稻密度下，4 g/L黄腐植酸浸种栽培稻可通过调节栽培稻的生长发育状况，改变栽培稻-杂草稻相互间的生态关系，进而影响杂草稻分蘖动态、光合性能和单株产量等生理生态特性，缓解杂草稻对栽培稻的竞争抑制。

关 键 词：Fulvic acid （FA）  Cultivated rice  Weedy rice  Physiological ecology 

分 类 号：S511[农业科学—作物学]