应用<sup>15</sup>N示踪技术研究控释尿素在稻田中的去向及利用率

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3 水稻花后各阶段干物质和¹⁵N的转运量、转运效率和对籽粒的贡献率

Table 3 Dry matter and ¹⁵N translocation, translocation efficiency and contribution efficiency to grain of rice at different growth stages after anthesis

处理 Treatment	时期 Stages	干物质转运量 Day matter translocation (g·m^-2)	转运效率 Translocation efficiency (%)	对籽粒的贡献率 Contribution efficiency to grain (%)	¹⁵N转运量 ¹⁵N translocation (g·m^-2)	¹⁵N转运效率 ¹⁵N translocation efficiency (%)	对籽粒的贡献率 Contribution efficiency to grain (%)
U	开花期—灌浆期 Anthesis-Filling	206.47	24.0	23.1	2.15	61.1	77.7
U	开花期—成熟期 Anthesis-Maturity	274.66	32.0	30.8	2.30	65.3	83.0
CRU	开花期—灌浆期 Anthesis-Filling	191.50	21.6	20.6	1.97	49.3	61.5
CRU	开花期—成熟期 Anthesis-Maturity	286.78	32.3	30.8	2.69	67.2	83.8