Effects of increased ammonia on root/shoot ratio, grain yield and nitrogen use efficiency of two wheat varieties with various N supply
Effects of increased ammonia on root/shoot ratio, grain yield and nitrogen use efficiency of two wheat varieties with various N supply
复制标题
DOI：
10.17221/52/2009-pse
复制
发表时间：
2018-02
影响因子：
2.4
通讯作者：
L. Jing;Liang Shi-qing;L. Yi
中科院分区：
文献类型：
--
作者：
L. Jing;Liang Shi-qing;L. Yi
在开顶温室中研究了大气 NH(3) 升高对两种冬小麦品种生长和产量参数的影响，即高水肥需求品种小偃 6 号 (XY6) 和抗旱品种长旱 58 (CH58)，两种施氮水平均在开顶室中进行。结果表明，结合高氮处理，将大气中NH(3)浓度从环境水平10 nl/l NH3增加至1000 nl/l，显着（P < 0.05）降低了植物的生物量和根冠比，尤其是XY6植物，主要是因为它对花期和成熟期根部生物量产生产生负面影响。此外，暴露于较高的大气NH(3)浓度而非环境浓度并结合高氮处理后，XY6的籽粒产量提高了1.51%，而CH58的籽粒产量降低了13.2%。相反，结合低氮处理，大气中NH(3)升高分别对XY6和CH58植物的籽粒产量产生显着和非显着的积极影响。暴露于高大气 NH(3) 浓度以及高氮或低氮处理的两个品种的植物的氮利用效率 (NUE) 和相关参数均较低。
The effects of elevated atmospheric NH(3) on growth and yield parameters of two winter wheat varieties, the high water and fertilizer-demanding variety Xiaoyan 6 (XY6) and the drought-resistant variety Changhan 58 (CH58), grown with two levels of N fertilization, were studied in Open-Top Chambers. The results showed that in combination with the high N treatment increasing the atmospheric NH(3) concentration to 1000 nl/l from the ambient level of 10 nl/l NH3 significantly (P < 0.05) reduced the biomass and the root/shoot ratios of the plants, especially in XY6 plants, mainly because it negatively influenced root biomass production at anthesis and mature stages. In addition, the grain yield of XY6 was by 1.51% higher, while that of CH58 was 13.2% lower, following exposure to the elevated atmospheric NH(3) concentration rather than the ambient concentration in combination with the high N treatment. In contrast, in combination with the low N treatment, elevated atmospheric NH(3) had significantly and non-significantly positive effects on the grain yield of XY6 and CH58 plants, respectively. The Nitrogen Use Efficiency (NUE) and related parameters were all lower in plants of both varieties exposed to the high atmospheric NH(3) concentration together with either the high or low N treatment.