应用15N示踪技术研究控释尿素在稻田中的去向及利用率
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李鹏飞, 李小坤, 侯文峰, 任涛, 丛日环, 杜昌文, 邢烈火, 王少华, 鲁剑巍
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Studying the Fate and Recovery Efficiency of Controlled Release Urea in Paddy Soil Using 15N Tracer Technique
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PengFei LI, XiaoKun LI, WenFeng HOU, Tao REN, RiHuan CONG, ChangWen DU, LieHuo XING, ShaoHua WANG, JianWei LU
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| 表4 水稻吸收肥料氮和土壤氮的比例 |
| Table 4 The percentage of 15N derived from fertilizer (Ndff) and soil (Ndfs) of rice |
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| 处理 Treatment | 产量
Yield
(g·m-2) | 植株吸氮量
Total N uptake
(g·m-2) | 来自肥料的氮
N from fertilizer
(g·m-2) | 较U处理增加Increase（%） | Ndff
(%) | 较U处理增加百分点Increase percentage points | 来自土壤的氮
N from soil
(g·m-2) | 较CRU处理增加Increase（%） | Ndfs
(%) | 较CRU处理增加百分点Increase percentage points | 激发氮量
Stimulated N
(g·m-2) | 较CRU处理增加Increase（%） | | CK | 768.35b | 9.09b | — | — | — | — | 9.09b | — | 100.0a | — | — | — | | U | 892.38a | 16.50a | 3.99 | — | 24.2 | — | 12.51a | 3.1 | 75.8b | 2.9 | 3.42 | 12.5 | | CRU | 930.62a | 16.65a | 4.52 | 13.3 | 27.1 | 2.9 | 12.13a | — | 72.9b | — | 3.04 | — |
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