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首页> 外文期刊>Soil Science and Plant Nutrition >Effects of atmospheric ammonia enrichment and nitrogen status on the growth of maize.
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Effects of atmospheric ammonia enrichment and nitrogen status on the growth of maize.

机译：大气氨氮富集和氮素状况对玉米生长的影响。

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摘要

Enhanced atmospheric ammonia (NH3) concentration could impact growth of crops. The effect of atmospheric NH3 in combination with nitrogen-deprived and -sufficient supply (ND and NS, respectively) on growth of maize plants (Zea mays L.) was investigated. Plants were exposed to 0 and 1000 nL L-1 NH3 for 50 days in open-top chambers (OTCs). At different growing stages after injecting NH3, elevated NH3 significantly increased plant height, leaf area per plant and shoot biomass (total biomass) in the nitrogen-deprived plants in 2006 and 2007, but the corresponding values in the nitrogen-sufficient plants remained the same or slightly decreased. The values for net photosynthesis rate (Pn) and relative content of chlorophyll (SPAD value) increased with NH3 enhancement both in the presence and absence of nitrogen in nutrient solution, but the increment of Pn and SPAD value in nitrogen-deprived plants was two times higher than that of the nitrogen-sufficient plants in each year. The shoot: root ratio (S/R) for maize first decreased and then rose during the growing season. At 50 days after injecting NH3, the S/R in the ND-1000 plants was significantly higher than that in the ND-0 plants in both years. Under these conditions, increased growth was observed, and it was concluded that the effect of atmospheric NH3 on maize could be mainly due to the shoot growth response.
机译：大气氨（NH 3 ）浓度升高可能会影响农作物的生长。研究了大气中的NH 3 结合氮不足和充足的氮供应（分别为ND和NS）对玉米（Zea mays L.）植物生长的影响。 。将植物在开顶室（OTC）中暴露于0和1000 nL L -1 NH 3 50天。在注入NH 3 后的不同生长阶段，升高的NH 3 显着增加了2006年缺氮植物的株高，单株叶面积和苗生物量（总生物量）。和2007年，但氮充足植物中的相应值保持相同或略有下降。随着NH的增加，净光合速率（ P n ）和叶绿素的相对含量（ SPAD ）值均增加营养液中存在和不存在氮的情况下 3 都会增强，但是 P n 和<每年，缺氮植物中的i> SPAD 值是高氮植物中的2倍。玉米的根茎比（S / R）在生长季节先下降，然后上升。在注入NH 3 后的第50天，这两个年份的ND-1000植物的S / R均显着高于ND-0植物。在这种条件下，观察到了生长的增加，并且得出结论，大气中NH 3 对玉米的影响可能主要是由于芽生长的响应。

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