Effects of ozone on the growth and yield of rice (Oryza sativa L.) under different nitrogen fertilization regimes
Effects of ozone on the growth and yield of rice (Oryza sativa L.) under different nitrogen fertilization regimes
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DOI：
10.1007/s11356-019-06358-6
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发表时间：
2019-09
影响因子：
5.8
通讯作者：
K. Tatsumi;Tamami Abiko;Yoshiyuki Kinose;Shiro Inagaki;T. Izuta
中科院分区：
文献类型：
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作者：
K. Tatsumi;Tamami Abiko;Yoshiyuki Kinose;Shiro Inagaki;T. Izuta
为了研究水稻生长和产量对水稻生长和产量的敏感性。水稻品种越光（Koshihikari）在标准施氮（SN）和不施氮（NN）条件下暴露于臭氧（O3）中。水稻植株受到3种气体处理（炭过滤空气（CF）和O3（1.0（1.0×O3）和1.5（1.5×O3）倍于环境浓度）结合两种条件下的N施肥。在整个生长期的五个时间点，收集植物样品以测量每个植物器官的叶面积和干质量。在最终收获时，测量产量、产量构成和收获指数。O3和N对叶、茎、根和全株干重的影响存在显著的交互作用。SN处理下，1.5× O3处理下水稻各器官干质量和全株干质量显著低于CF和1.0× O3处理，NN处理下各器官干质量差异不显著。在SN处理下，O3暴露显著降低糙米产量，而在NN处理下，O3暴露对糙米产量影响不显著。在SN下，基于AOT40（超过40 nmol mol−1阈值的累积暴露量）的相对产量损失率明显，而在NN下，不同AOT40水平下的相对产量几乎不变。我们的结论是，水稻的生长和产量的敏感性O3依赖于土壤中的N水平，暴露于环境水平的O3对水稻有负面影响下SN，但不是NN。
To examine whether the sensitivity of growth and yield of rice (Oryza sativaL.) to ozone (O3) varies under different nitrogen (N) fertilization conditions, rice cultivar ‘Koshihikari’ was exposed to O3under either standard N (SN) fertilization or no N (NN) fertilization. The rice plants were subjected to three gas treatments (charcoal-filtered air (CF) and O3at 1.0 (1.0×O3) and 1.5 (1.5×O3) times the ambient concentration) in combination with two conditions of N fertilization. At five time points throughout the growth period, plant samples were collected to measure the leaf area and dry mass of each plant organ. At the final harvest, yield, yield components, and harvest index were measured. There was a significant interactive effect of O3and N on leaf, stem, root, and whole-plant dry mass at the final harvest. The dry mass of each plant organ and the whole-plant dry mass of rice plants grown in 1.5×O3were significantly lower than those in the plants grown in CF and 1.0×O3under SN, whereas there were no significant differences in the dry mass among the three gas treatments under NN. Brown rice yield was significantly reduced by the exposure to O3under SN, but not under NN. Relative yield loss rate based on the AOT40 (accumulated exposure over a threshold of 40 nmol mol−1) was pronounced under SN, whereas relative yield was almost unchanged at different AOT40 levels under NN. We concluded that the sensitivity of growth and yield of rice to O3is dependent on N levels in the soil; the exposure to ambient levels of O3has a negative effect on rice under SN, but not under NN.