Effect of Nitrogen Fertilizer on Nitrogen Accumulation, Translocation, and Use Efficiency in Dryland Oilseed Flax

文献类型： 外文期刊

第一作者： Xie, Yaping

作者： Xie, Yaping;Gan, Yantai;Niu, Junyi;Gao, Yuhong;Xie, Yaping;Niu, Junyi;Gao, Yuhong;Gan, Yantai;Li, Yang;An, Huihui;Li, Airong

作者机构：

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 5 期

页码：

收录情况： SCI

摘要： Oilseed flax (Linum usitatissimum L.) yields are primarily fertilizer-limited, especially by N supply in the semiarid regions of North China. This study was conducted to determine whether N accumulation, translocation and N use efficiency (NUE) could be manipulated through N. The effects of N on N translocation, oilseed flax yield, oil content and NUE were studied at Zhangjiakou, China. Plants were grown at 0, 45, 90, and 135 kg N ha(-1) (designated as the control, low N, moderate N, and high N, respectively), in 2011 and 2012. We found that N accumulation in leaves and capsule pericarps reached the maximum at anthesis and kernel developmental stage, respectively, then decreased rapidly before maturity. Averaged over 2 yr, N translocation from leaves to the seeds increased by 43, 150, and 150% under low N, moderate N, and high N, respectively, compared to the control; similarly, N translocation in capsule pericarps increased by 43, 243, and 190%, respectively. We discovered that leaves contributed the largest proportion of the seed N (averaging 80% in both years), and secondarily by the capsule pericarp N, which contributed 12% (in 2011) and 9% (in 2012) of the seed N. The highest seed yields were 2270 kg ha(-1) (in 2011) and 1903 kg ha(-1) (in 2012) which were obtained with the moderate N. Oil content was not affected by N. Nitrogen use efficiency decreased with progressively higher rates of N. The results suggest the moderate-N supply was adequate for promoting N translocation, and increasing N harvest index, NUE, and the productivity of oilseed flax.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序