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水稻生长及其体内C、N、P组成对开放式空气CO2浓度增高和N、P施肥的响应
引用本文:谢祖彬,朱建国,张雅丽,马红亮,刘钢,韩勇,曾青,蔡祖聪.水稻生长及其体内C、N、P组成对开放式空气CO2浓度增高和N、P施肥的响应[J].应用生态学报,2002,13(10):1223-1230.
作者姓名:谢祖彬  朱建国  张雅丽  马红亮  刘钢  韩勇  曾青  蔡祖聪
作者单位:中国科学院南京土壤研究所土壤圈物质循环重点实验室,南京,210008
基金项目:中国科学院知识创新重要方向项目 (KZCX2 40 8),国家自然科学基金重大国际合作研究资助项目 (4 0 12 0 14 0 817) .
摘    要:采用FACE(Free Air Carbon-dioxide Enrichment)技术,研究了不同N、P施肥水平下,水稻分蘖期、拔节期、抽穗期和成熟期根、茎、穗生长,C/N比、N、P含量及N、P吸收对大气CO2浓度升高的响应,结果表明,高CO2促进水稻茎、穗和根的生长,增加分蘖期叶干重,对拔节期、抽穗期的成熟期叶干重没有显著增加,降低茎、叶N含量;增加抽穗期穗N含量;降低成熟期穗N含量;对分蘖期根N含量影响不显著,而降低拔节期,抽穗期和成熟期根N含量,增加拔节期、抽穗期和成熟期叶P含量,对茎、穗、根P含量影响不显著,水稻各组织C含量变化不显著,C/N比增加,显著增加水稻地上部分P吸收;增加N吸收,但没有统计显著性,N、P施用对水稻各组织生物量没有显著影响,高N(HN)比低N(LN)增加组织中N含量,而不同P肥水平间未表现出明显差异,高N条件下高CO2增加水稻成熟期地下部分/地上部分比,文中还讨论了高CO2对N、P含量及地下部分/地上部分比的影响机制。

关 键 词:水稻生长  施肥  响应  CO2浓度升高  C/N比  P含量  P吸收  N含量  N吸收  FACE  N肥  P肥
文章编号:1001-9332(2002)10-1223-08
修稿时间:2002年6月28日

Responses of rice (Oryza sativa) growth and its C, N and P composition to FACE (Free-air Carbon Dioxide Enrichment) and N,P fertilization
XIE Zubin,ZHU Jianguo,ZHANG Yali,MA Hongliang,LIU Gang,HAN Yong,ZENG Qing and CAI Zucong.Responses of rice (Oryza sativa) growth and its C, N and P composition to FACE (Free-air Carbon Dioxide Enrichment) and N,P fertilization[J].Chinese Journal of Applied Ecology,2002,13(10):1223-1230.
Authors:XIE Zubin  ZHU Jianguo  ZHANG Yali  MA Hongliang  LIU Gang  HAN Yong  ZENG Qing and CAI Zucong
Institution:Key Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008. zbxie@issas.ac.cn
Abstract:FACE (Free-air Carbon Dioxide Enrichment) was used to study the effects of elevated CO 2 on rice (Oryza sativa) growth,tissue C/N,N and P concentration and uptake at different development stages under two N and two P levels. Results showed that elevated CO 2 increased dry matter accumulation in rice stem, ear and root. Leaf dry matter was increased at tillering stage and no significant effect was found at jointing, heading and ripening stages. N concentration of stem and leaf was decreased. Ear N concentration at heading stage was increased but was decreased at ripening stage. No significant effect was found on root N concentration at tillering stage but root N concentration at jointing, heading and ripening was decreased. Leaf P concentration at jointing, heading and ripening was increased but no significant effect was found on P concentration in stem, ear and root. C content in various tissues changed unremarkably and the ratio of C over N (C/N) was increased. Elevated CO 2 significantly increased P uptake in aboveground tissues; and increased N uptake, but the difference was not statistically significant. N and P fertilization had no significant effect on various tissue dry biomass. Tissue N content at higher N fertilization was higher than at lower N fertilization but no such effect of P fertilization on tissue P content was found. At higher N fertilization, elevated CO 2 increased the ratio of below-ground biomass over above-ground biomass at ripening stage. Possible reasons are discussed for the differences of tissue N and P content and the ratio of below-ground biomass over above-ground biomass between elevated and ambient atmospheric CO 2 concentrations.
Keywords:Free-air CO  2 enrichment  Rice growth  C/N  N and P content  N and P uptake    
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