The impact of free-air CO2 enrichment (FACE) and nitrogen supply on grain quality of rice
The impact of free-air CO2 enrichment (FACE) and nitrogen supply on grain quality of rice
复制标题
大气二氧化碳富集（FACE）和氮肥供应对稻米品质的影响
DOI：
10.1016/j.fcr.2007.03.006
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发表时间：
2007-06-05
影响因子：
5.8
通讯作者：
Han, Yong
中科院分区：
文献类型：
--
作者：
Yang, Lianxin;Wang, Yulong;Han, Yong
由于植物光合作用需要CO2，大气CO2浓度（[CO2]）的增加有可能促进水稻（Oryza sativa L.）的生长和产量，但关于[CO2]浓度升高对稻米品质的影响，特别是在不同氮素有效性条件下的影响，目前尚不清楚。为了研究CO2和N供应对稻米品质的交互作用，我们于2001-2003年在中国江苏无锡进行了自由空气CO2增浓（FACE）试验。一个长粒型粳稻品种。武香青14）在环境温度或高温（约100 ℃）下生长。200 μ mol mol（-1）高于环境）[CO2]在三个水平的N：低（LN，15 g N m（2）），中（MN，25 g N m（2））和高N（HN，35 g N m（2）（2002，2003））。锰含量与建议当地农民的水平相若。面部粗糙度显著增加（升12.8%），棕色（+13.2%）和精米产量（+10.7%），同时显著降低整精米产量（-13.3%）; FACE导致加工适宜性严重恶化（精米率-2.0%;整精米率-23.5%）和外观品质（垩白粒率+16.9%;垩白度+28.3%），精米蛋白质含量（-6.0%）和铜含量（-20.0%）也受到FACE的负面影响。与此相反，FACE导致更好的食用/烹饪品质（直链淀粉含量-3.8%;峰值粘度+4.5%，崩解值+2.9%，消减值-27.5%）。这些变化表明，粮食的硬度下降，而凝聚力和韧性增加蒸煮时[CO2]升高。总体而言，氮供应对水稻产量有显着影响，最大值发生在MN，而籽粒品质是响应N供应，表现出更好的外观和食用/烹饪品质LN或MN作物相比，HN作物的趋势。在大多数情况下，没有[CO2] x N的相互作用，检测产量和品质参数。这些数据表明，目前推荐的水稻生产氮肥施用量不应根据预测的未来[CO2]水平进行修改，至少在本实验的类似条件下。(c)2007年由Elsevier B. V.出版。
Because CO2 is needed for plant photosynthesis, the increase in atmospheric CO2 concentration ([CO2]) has the potential to enhance the growth and yield of rice (Oryza sativa L.), but little is known regarding the impact of elevated [CO2] On grain quality of rice, especially under different N availability. In order to investigate the interactive effects of [CO2] and N supply on rice quality, we conducted a free-air CO2 enrichment (FACE) experiment at Wuxi, Jiangsu, China, in 2001-2003. A long-duration rice japonica with large particle (cv. Wuxiangging 14) was grown at ambient or elevated (ca. 200 mu mol mol(-1) above ambient) [CO2] under three levels of N: low (LN, 15 g N m(2)), medium (MN, 25 g N m(2)) and high N (HN, 35 g N m(2) (2002, 2003)). The MN level was similar to that recommended to local farmers. FACE significant increased rough (+12.8%), brown (+13.2%) and milled rice yield (+10.7%), while markedly reducing head rice yield (-13.3%); FACE caused serious deterioration of processing suitability (milled rice percentage -2.0%; head rice percentage -23.5%) and appearance quality (chalky grain percentage +16.9%; chalkiness degree +28.3%) drastically; the nutritive value of grains was also negatively influenced by FACE due to a reduction in protein (-6.0%) and Cu content (-20.0%) in milled rice. By contrast, FACE resulted in better eating/cooking quality (amylose content -3.8%; peak viscosity +4.5%, breakdown +2.9%, setback -27.5%). These changes in grain quality revealed that hardness of grain decreased with elevated [CO2] while cohesiveness and resilience increased when cooked. Overall, N supply had significant influence on rice yield with maximum value occurring at MN, whereas grain quality was less responsive to the N supply, showing trends of better appearance and eating/cooking quality for LN or MN-crops as compared with HN-crops. For most cases, no [CO2] x N interaction was detected for yield and quality parameters. These data suggested that the current recommended rates of N fertilization for rice production should not be modified under projected future [CO2] levels, at least for the similar conditions of this experiment. (c) 2007 Published by Elsevier B.V.