文献类型： 外文期刊

作者： Guan Yu ¹ ; Qiao Zhen ² ; Du Jiu-yuan ³ ; Du Yan-lei ² ;

作者机构： 1.Shihezi Univ, Dept Resource & Environm Sci, Agron Coll, Shihezi 832000, Peoples R China

2.Lanzhou Univ, Inst Arid Agroecol, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China

3.Gansu Acad Agr Sci, Inst Wheat, Lanzhou 730070, Peoples R China

关键词： grain yield;phosphorus supply;root carbon consumption;spring wheat;water supply

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2016 年 15 卷 7 期

页码：

收录情况： SCI

摘要： In semiarid areas, cereal crops often allocate more biomass to root at the expense of aboveground yield. A pot experiment was conducted to investigate carbon consumption of roots and its impact on grain yield of spring wheat (Triticum aestivum L.) as affected by water and phosphorus (P) supply. A factorial design was used with six treatments namely two water regimes (at 80-75% and 50-45% field capacity (FC)) and three P supply rates (P1=0, P2=44 and P3=109 mu g P g(-1) soil). At shooting and flowering stages, root respiration and carbon consumption increased with the elevate of P supply rates, regardless of water conditions, which achieved the minimum and maximum at P1 under 50-45% FC and P3 under 80-75% FC, respectively. However, total aboveground biomass and grain yield were higher at P2 under 80-75% FC; and decreased with high P application (P3). The results indicated that rational or low P supply (80-75% of field water capacity and 44 mg P kg(-1) soil) should be recommended to improve grain yield by decreasing root carbon consumption in semiarid areas.