应用15N示踪技术研究控释尿素在稻田中的去向及利用率

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

Studying the Fate and Recovery Efficiency of Controlled Release Urea in Paddy Soil Using 15N Tracer Technique

PengFei LI, XiaoKun LI, WenFeng HOU, Tao REN, RiHuan CONG, ChangWen DU, LieHuo XING, ShaoHua WANG, JianWei LU

表2 不同生育期水稻植株各部位15N积累及分配

Table 2 15N accumulation and distribution of different parts of rice plants at different growth stages

处理 Treatment 取样时期 Sampling stage 15N积累量 15N accumulation (g·m-2) 茎Stem 鞘Sheath 叶Leaf 籽粒Grain 穗轴Cob 穗Panicle 合计Total U 孕穗期 Booting 0.08c (2.4) 0.71b (21.1) 2.46a (73.2) — — 0.11e (3.3) 3.36c 抽穗期 Heading 0.22b (5.5) 0.83b (20.9) 2.47a (62.2) 0.34d (8.6) 0.11a (2.8) 0.45d (11.4) 3.97b 开花期 Anthesis 0.32a (6.2) 0.98a (19.1) 2.10b (40.9) 1.61c (31.4) 0.12a (2.3) 1.73c (33.7) 5.13a 灌浆期 Filling 0.12c (3.5) 0.54c (15.7) 0.62c (18.1) 2.07b (60.3) 0.08b (2.3) 2.15b (62.6) 3.43c 成熟期 Maturity 0.28a (7.0) 0.40d (10.0) 0.46d (11.5) 2.77a (69.4) 0.08b (2.0) 2.85a (71.4) 3.99b CRU 孕穗期 Booting 0.14c* (3.3) 1.16ab* (27.4) 2.79a* (65.8) — — 0.15e* (3.5) 4.24b* 抽穗期 Heading 0.37b* (7.8) 1.12b* (23.7) 2.51b (53.2) 0.54d* (11.4) 0.18b* (3.8) 0.72d* (15.2) 4.72b* 开花期 Anthesis 0.52a* (8.3) 1.23a* (19.7) 2.04c (32.7) 2.23c* (35.7) 0.22a* (3.5) 2.45c* (39.2) 6.24a* 灌浆期 Filling 0.18c* (3.8) 0.80c* (16.8) 0.93d* (19.5) 2.74b* (57.4) 0.12c* (2.5) 2.86b* (59.9) 4.77b* 成熟期 Maturity 0.35b* (7.7) 0.48d* (10.6) 0.39e* (8.6) 3.21a* (71.0) 0.09d* (2.0) 3.30a* (73.0) 4.52b*