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	Effects of anionic polyacrylamide on maize growth: a short term C-14 labeling study
	Wu L. ; Ok Y. S. ; Xu X. L. ; Kuzyakov Y.
	2012
关键词	PAM Soil aggregates Plant activity C-14 labeling Soil moisture Rhizodeposition agricultural soil lolium-perenne carbon erosion infiltration rhizosphere irrigation nitrogen plant land
英文摘要	Aims Various anionic polyacrylamide polymers (PAMs) are frequently used to improve soil properties and reduce erosion. However, the effects of their application on plant growth remain unclear. Methods Aggregate-free loess with high water holding capacity was used as growing substrate to test the effects of two rates (10 and 40 kg ha(-1)) of a linear PAM on the growth of maize (Zea maize L.) for a period up to one month. The PAM effects were evaluated at three levels of soil water content (SWC) and three plant ages, based on water consumption, shoot and root biomass, as well as allocation of recently assimilated C in plants and soil using C-14 labeling. Results Both SWC and maize age significantly affected water consumption, biomass accumulation, and C-14 allocation in plant parts and soil. Even though consistent increases in plant biomass and total assimilated C-14 were observed, the effects of PAM application were insignificant on either of these variables. Conclusions The effects of PAM application were directly connected to soil rather than to maize, and could be masked by the non-structural loess. The effects tended to be age and soil-moisture specific, and were modulated by the rhizodeposition processes. The possible mechanisms of PAM application on plant growth were also discussed.
出处	Plant and Soil
卷	350
期	1-2
页	311-322
收录类别	SCI
语种	英语
ISSN号	0032-079X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30724]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wu L.,Ok Y. S.,Xu X. L.,et al. Effects of anionic polyacrylamide on maize growth: a short term C-14 labeling study. 2012.

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