| 水稻产量对氮肥响应的品种间差异及其与根系形态生理的关系 |
| |
| 引用本文： | 刘立军,王康君,卞金龙,熊溢伟,陈璐,王志琴,杨建昌.水稻产量对氮肥响应的品种间差异及其与根系形态生理的关系[J].作物学报,2014,40(11):1999-2007. |
| |
| 作者姓名： | 刘立军 王康君 卞金龙 熊溢伟 陈璐 王志琴 杨建昌 |
| |
| 作者单位： | 1.扬州大学江苏省作物遗传生理国家重点实验室培育点 / 粮食作物现代产业技术协同创新中心，江苏扬州225009；2连云港市农业科学院，江苏连云港222000 |
| |
| 基金项目： | 国家自然科学基金项目(31171481,31371562);国家公益性行业(农业)科研专项(201203031,201103003,201203079);国家“十二五”科技支撑计划项目(2011BAD16B14,2012BAD04B08,2013BAD07B09);江苏省高校优势学科建设工程资助项目资助 |
| |
| 摘 要： | 以籼稻天优华占、两优培九和粳稻陵香优18、宁粳1号为材料，研究了水稻产量对氮肥的响应。结果表明，水稻产量对施氮量的反应存在明显的品种间差异。上述4个水稻品种在获得最高产量(10.1~10.3 t hm-2)时，天优华占和陵香优18所需施氮量为242.5~255.5 kg hm-2，明显低于两优培九和宁粳1号的327.3~328.0 kg hm-2。天优华占和陵香优18的氮肥农学利用率和氮肥偏生产力均明显高于两优培九和宁粳1号，表明天优华占和陵香优18产量对氮肥的反应较两优培九和宁粳1号敏感。在高产(10.5~10.9 t hm-2)条件下，天优华占和陵香优18主要生育期根系的重量、长度和总吸收表面积低于两优培九和宁粳1号，而根系活跃吸收表面积及其占总吸收表面积的比例、根系伤流量以及根系活力则显著高于两优培九和宁粳1号。上述结果表明，通过栽培措施调控或选用根系活跃吸收表面积、根系伤流量和根系活力高的水稻品种将更有利于降低水稻施氮量和提高产量及氮肥利用效率。
|
| 关 键 词： | 水稻品种 产量 氮肥利用效率 根系形态生理 |
| 收稿时间： | 2014-07-03 |
Differences in Yield Response to Nitrogen Fertilizer among Rice Cultivars and Their Relationship with Root Morphology and Physiology |
| |
| LIU Li-Jun;WANG Kang-Jun;BIAN Jin-Long;XIONG Yi-Wei;CHEN Lu;WANG Zhi-Qin;YANG Jian-Chang.Differences in Yield Response to Nitrogen Fertilizer among Rice Cultivars and Their Relationship with Root Morphology and Physiology[J].Acta Agronomica Sinica,2014,40(11):1999-2007. |
| |
| Authors: | LIU Li-Jun;WANG Kang-Jun;BIAN Jin-Long;XIONG Yi-Wei;CHEN Lu;WANG Zhi-Qin;YANG Jian-Chang |
| |
| Institution: | 1.Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China;2.Lianyungang Academy of Agricultural Sciences, Lianyungang 222000, China Abstract: Yield responses to nitrogen (N) rates in indica rice cultivars Tianyouhuazhan, Liangyoupeijiu a |
| |
| Abstract: | Yield responses to nitrogen (N) rates in indica rice cultivars Tianyouhuazhan, Liangyoupeijiu and japonica rice cultivars Lingxiangyou 18 and Ningjing 1 were investigated and showed significant differences among them. The optimal N rates in Tianyouhuazhan and Lingxiangyou 18 were only 242.5–255.5 kg ha-1, significantly lower than those in Liangyoupeijiu and Ningjing 1 (327.3–328.0 kg ha-1), when the maximum grain yield (10.1–10.3 t ha-1) reached. The agronomic use efficiency and partial factor productivity of N fertilizer were much higher in Tianyouhuazhan and Lingxiangyou 18 than in Liangyoupeijiu and Ningjing 1, indicating that the yield is much more sensitive to N rate in the former two cultivars than in the latter two rice cultivars. Under high-yielding (10.5–10.9 t ha-1) conditions, root dry weight, root length and total root absorbing area at main growth stages were lower, but the root active absorbing area and its ratio to total root absorbing area, root bleeding sap and root activity were higher in Tianyouhuazhan and Lingxiangyou 18 than in Liangyoupeijiu and Ningjing 1. These results suggested that increasing root active absorbing area, root bleeding sap and root activity through the regulation of cultivation or breeding will be much more beneficial to decreasing N rate and increasing grain yield and N use efficiency in rice. |
| |
| Keywords: | Rice cultivars Yield Nitrogen use efficiency Root morphology and physiology |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《作物学报》浏览原始摘要信息 |
| 点击此处可从《作物学报》下载免费的PDF全文 |
