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- Title
Effects of Soaking Cultivated Rice Seeds with Fulvic Acid on Physiological and Ecological Properties of Weedy Rice.
- Authors
WANG, Xiaolin; YIN, Shujian; ZHANG, Zhuoya; ZHANG, Yong; LI, Gui
- Abstract
[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 cultivated rice Nanjing 44 were used as experimental materials for field plot trials to analyze the effects of soaking cultivated rice seeds with 0 (water as control), 4, 6, 8 g/L FA on tillering dynamics, plant height, chlorophyll content, photosynthetic performance, 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, tiller number, plant height, chlorophyll 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, tiller numbers of weedy rice at different 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; chlorophyll contents of weedy rice at the jointing stage were significantly 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 filling stage were significantly reduced by 6.37%-9.10%; Pn, Gs and Tr of weedy rice at the jointing stage and grain filling 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 reduced 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 regulate 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 properties and alleviate the competitive inhibition of weedy rice on cultivated rice.
- Publication
Agricultural Science & Technology, 2014, Vol 15, Issue 11, p1833
- ISSN
1009-4229
- Publication type
Academic Journal