| 不同水分管理对水稻生长与氮素利用的影响 |
| |
| 引用本文： | 沈阿林,昆虫男.不同水分管理对水稻生长与氮素利用的影响[J].植物营养与肥料学报,1997,3(2):111-116. |
| |
| 作者姓名： | 沈阿林 昆虫男 |
| |
| 作者单位： | 1.河南省农业科学院土壤肥料研究所 郑州450002;日本国国际协力事业团,JICA |
| |
| 摘 要： | 应用土柱模拟法和15N示踪技术研究了长期淹水和严重渗漏条件下水稻的生长和氮肥的吸收与转化。结果表明，两种水分条件下，水稻根系生长量和地上部干物质积累量明显不同。水稻在淹水条件下因根系生长受阻，氮积累在拔节后明显变缓；而渗漏条件下水稻对氮的吸收在孕穗期仍保持较高水平。前者对肥料氮的利用率较后者显著地低，且土壤矿化氮在所吸收的氮中的贡献率也相对较高。这与水稻在两种水分管理条件下的生长状况和氮在两种情形下的转化特点密切相关。本试验条件下，水稻于拔节后对土壤矿化氮的吸收数量明显增加，似有脱肥现象，因此，应提倡追施孕穗肥。
|
| 关 键 词： | 水稻 长期淹水 水分渗漏 氮素利用率 15N示踪技术 |
STUDY ON THE GROWTH AND UTILIZATION OF NITROGEN FOR RICE UNDER THE DIFFERENT WATER MANAGEMENTS |
| |
| Shen Alin,Liu Chunzheng,Chang Fushen,Chen Yongan Tada O Kon.STUDY ON THE GROWTH AND UTILIZATION OF NITROGEN FOR RICE UNDER THE DIFFERENT WATER MANAGEMENTS[J].Plant Nutrition and Fertilizer Science,1997,3(2):111-116. |
| |
| Authors: | Shen Alin Liu Chunzheng Chang Fushen Chen Yongan Tada O Kon |
| |
| Institution: | 1.Soil and Fertilizer Inst. Henan AAS. Zhengzhou 450002; Japan International cooperation Agency |
| |
| Abstract: | The differences in the growth of rice and the absorption and distribution of N in rice plant under long-term flooded and water leakage conditions were quantitatively inverstigated using 15N-urea in greenhouse imitative soil column experiment. The results indicated that the growth of root and accumulation of dry matter of rice plant were obviously different under two kinds of soil water managements. The accumulation of N in rice plant after elongation stage became lower under the long-term flooded condition,while the rice grew, under water leakage condition, still maintained high N absorption ability up to booting stage. The utilization rate of N fertilizer of the former was significantly lower than that of the later, and the contribution of soil mineralizable N was relatively higher in the former, compared with the later. This is related to the growth status of rice and the characteristics of nitrogen transformation in soil under two kinds of water managements. In the experiment. the absorbing rate of soil mineralizable N increased greatly after the elongation stage, it was assumed that the rice had a fertilizer deficiency phenomenon during the later period. Therefore,application of booting fertilizer should be recommended. |
| |
| Keywords: | |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《植物营养与肥料学报》浏览原始摘要信息 |
| 点击此处可从《植物营养与肥料学报》下载免费的PDF全文 |
