文献类型： 外文期刊

作者： Kaggwa, Ruth J. ¹ ; Waines, J. Giles ³ ; Wang, Guangyao ⁴ ;

作者机构： 1.Univ Arizona, Sch Plant Sci, Tucson, AZ 85721 USA

2.D Danforth Plant Sci Ctr, St Louis, MO 63132 USA

3.Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA

4.Shanxi Acad Agr Sci, Cotton Res Inst, Yuncheng 044000, Shanxi, Peoples R China

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2015 年 107 卷 4 期

页码：

收录情况： SCI

摘要： The plant root system is earmarked as key to the next Green Revolution. Field experiments were conducted in 2010-2011 and 20112012 to determine the impact of N management system on root growth in cultivar Pavon 76 (Pavon), bread wheat (Triticum aestivum L.), and wheat-rye (Secale cereale L.) translocations Pavon-1RS.1AL (1RS.1AL), and Pavon-1RS.1BL (1RS.1BL). The three genotypes were examined under organic N (manure) and synthetic N fertilizer regimes each at a high and low rate, and an unfertilized control. The translocated genotype 1RS.1BL had 23 and 9% higher total root biomass than Pavon in the 2010-2011 and 2011-2012 growing seasons, respectively. Compared to Pavon, root mass of genotypes 1RS. 1AL and 1RS.1BL was 23.3 to 55.9 g m(-3) higher in the top 40 cm of the soil profile and 15.1 to 31 g m(-3) higher in soil profiles below 40 cm. The 1RS translocations also had higher root dry mass than Pavon under synthetic N, low organic N and the unfertilized control. Mean genotype grain yields for both growing seasons ranged from 3.8 to 4.1 Mg ha(-1) and there were no differences between 1RS lines and Pavon. These studies show that the root system was enhanced without a subsequent loss of yield in a high yield potential environment; similar research is needed for low wheat yield potential environments.