| 李丽霞,郝明德,张春霞.不同种植方式下苜蓿地上部N、P、K 含量的动态变化[J].干旱地区农业研究,2005,(1):90~94 |
| 不同种植方式下苜蓿地上部N、P、K 含量的动态变化 |
| Dynamic changes of N，P，K contents in aboveground alfalfa with different farming modes |
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| DOI：10.7606/j.issn.1000-7601.2005.01.17 |
| 中文关键词: 种植方式 苜蓿 N、P、K含量 动态变化 |
| 英文关键词:farming mode alfalfa N, P and K contents dynamic changes |
| 基金项目:中国科学院知识创新工程项目(KZCX2-413)； 国家科技攻关(2001BA508B18) |
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| 中文摘要: |
| 以18年苜蓿施肥试验为基础,对苜蓿不同生育期植株氮、磷、钾含量的动态变化进行分析。结果表明:苜蓿连作中不同施肥处理植株N含量差异不显著,植株P含量明显增加;单施磷肥不能明显改变植株K含量的动态变化。轮作条件下,不同生长年限的苜蓿地上部分N含量均按同一趋势递减,而P、K含量的变化不一致,植株K含量随生长年限的增加而增加。 |
| 英文摘要: |
| According to the 18-year fertilizer experiment, the paper discusses and analyzes the dynamic changes in alfalfa at different growth stages with different farming modes. The results showed that the N contents of alfalfa under different fertilizations did not significantly differ, but the P content obviously increased; the use of only P fertilizers could not significantly change the N content in alfalfa. In alfalfa rotation, the N contents of alfalfa with different growing lengths tended to decline while in the aboveground part of alfalfa, the P and K contents varied in different patterns and the K content increased as alfalfa grew longer and longer. |
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