中文摘要：

为揭示不同氮肥处理对节水灌溉水稻生长特征及产量的响应机理,本试验设计常规灌溉A和控制灌溉B、C 3种灌溉模式,以及常规尿素肥、生物炭与尿素肥混合、控释肥3种氮肥管理模式,采用盆栽试验,分析了不同水氮管理条件下水稻的茎蘖、株高、叶面积指数、叶绿素含量、产量以及灌溉水分生产率的变化规律。结果表明,生物炭与尿素混合施肥模式和控释肥施肥模式水稻生长特征较为相似,但也有一定区别,生物炭与尿素混合施肥模式促进水稻地上部分的生长,提高了水稻有效分蘖率,水稻的产量和灌溉水分生产率分别较常规施肥模式提高了11.15%和7.26%,控释肥一定程度促进水稻地上部分的生长,提高水稻产量,但水稻的有效分蘖率和灌溉水分生产率较常规肥管理低。与灌溉模式A相比,灌溉模式B水稻地上部分生长受到轻微抑制,水稻产量略有降低,但灌水量显著降低（P〈0.05）,水稻灌溉水分生产率得到大幅度提高,平均提高0.70kg/m~3;灌溉模式C水稻灌水量大幅度降低,灌溉水分生产率也最高,但水稻生长受到抑制较为明显,水稻减产幅度较高。综上所述,灌溉模式B和生物炭与尿素肥混施为本次试验最合理的水氮管理方式。

英文摘要：

In order to explore the effects of different nitrogen fertilizer treatment on rice growth and yield under water-saving irriga- tion. Three types of irrigation modes： normal irrigation A, control irrigation B, control irrigation C, and three types of nitrogen fer- tilizer managements： urea fertilizer management, biochar and urea mixture management, controlled release fertilizer management were designed in the experiment. Based on pot experiment, the variation of the stems and tillers of rice, plant height, leaf area in- dex, chlorophyll, yield, irrigation volumes and the productivity of irrigation water were analyzed under different water and nitrogen fertilizer managements. The results showed that bioehar and urea mixture fertilization model was similar to controlled release fertiliz- er fertilization model on rice growth, but there were some difference also. Biochar and urea mixture fertilization model promoted the growth of the ground part of the rice and effective tiller rate. Under the condition of Biochar and urea mixture fertilization model, the rice yield and the irrigation water productivity increased by 11.15 ~ and 7. 26 % respectively compared with urea fertilizer fertilization model. Controlled release fertilizer promoted the growth of the ground part of the rice and increased rice yield to a certain extent, but its effective tiller rate and irrigation water productivity was less than urea fertilizer management, compared with irrigation mode A, irrigation mode B slightly inhibited the growth of the ground part of the rice and the rice yield slightly decreased, but the irrigation quantity were significantly decreased（P〈0. 05） ,and rice irrigation water productivity improved greatly, improved 0. 70 kg/m^3 on av- erage; Under the condition of irrigation mode C, the rice＇s irrigation quantity reduced most and the irrigation water productivity was highest, but the ground part of the rice were significantly inhibited and rice yield reduction is higher. In conclusion, irrigation mode B and biochar