| 铁营养状况及不同形态氮素对玉米体内不同铁库铁再利用的影响 |
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| 引用本文： | 郭世伟,邹春琴,张福锁,江荣风.铁营养状况及不同形态氮素对玉米体内不同铁库铁再利用的影响[J].土壤学报,2001,38(4):464-470. |
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| 作者姓名： | 郭世伟 邹春琴 张福锁 江荣风 |
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| 作者单位： | 中国农业大学农业部植物营养系,北京,100094 |
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| 基金项目： | 国家自然科学基金 (编号 3 9970 43 3 3 9770 42 4)，国家基础研究专项经费 (编号G1 990 1 1 70 7)共同资助 |
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| 摘 要： | 采用分根技术、营养液培养方法 ,研究缺铁条件下供应不同形态氮素对玉米苗期体内不同铁库中铁再利用的影响。结果表明 ,缺铁条件下 ,玉米新生叶片铁营养状况不仅受体内铁库强度大小的影响 ,而且也受外界调节措施—氮素形态的调节。研究发现 ,与NO3-N相比 ,不考虑根细胞质外体铁库时 ,供应NH4-N可使初生叶中 32 %的铁再利用 ,考虑根系铁库时 ,初生叶铁变化不明显 ,而可使根系 40 %的铁转移至地上部。无论根系是否有铁库 ,缺铁条件下 ,NH4-N能提高新叶活性铁含量和伤流液中铁浓度。
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| 关 键 词： | 铁再利用效率 铁库 铁供应状况 氮素形态 玉米 |
| 收稿时间： | 2000/6/20 0:00:00 |
| 修稿时间： | 2000年6月20日 |
EFFECTS OF IRON SUPPLY AND DIFFERENT NITROGEN FORM ON REMOBILIZATION OF IRON FROM DIFFERENT IRON POOLS IN MAIZE PLANT |
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| Guo Shi-wei,Zou Chun-qin,Zhang Fu-suo and Jiang Rong-feng.EFFECTS OF IRON SUPPLY AND DIFFERENT NITROGEN FORM ON REMOBILIZATION OF IRON FROM DIFFERENT IRON POOLS IN MAIZE PLANT[J].Acta Pedologica Sinica,2001,38(4):464-470. |
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| Authors: | Guo Shi-wei Zou Chun-qin Zhang Fu-suo and Jiang Rong-feng |
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| Affiliation: | Department of plant nutrition, China Agricultural University, Beijing 100094;Department of plant nutrition, China Agricultural University, Beijing 100094;Department of plant nutrition, China Agricultural University, Beijing 100094;Department of plant nutrition, China Agricultural University, Beijing 100094 |
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| Abstract: | Effects of iron and two nitrogen forms (nitrate and ammonium nitrogen) on remobilization of iron from different iron pools in maize plants were studied in a split root system in nutrient solution under controlled conditions. The results showed that, Fe nutrition status in young leaves of maize was affected not only by Fe pools strength in maize plants, but also by different nitrogen forms under Fe deficiency stress. When there was no Fe pool in root system, NH 4-N supply led to 32% of Fe in the primary leaves to be remobilized to young leaves of maize plants, and 40% of Fe in roots with Fe pool to be remobilized. Regardless of root Fe pool, active Fe in new leaves and Fe concentration in xylem sap were increased by NH 4 N application. |
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| Keywords: | Iron reutilization Iron pool Iron supply Nitrogen form Maize |
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