CAJ | 학술논문

为明确控释氮肥在水稻生产中的适宜用量，促进控释氮肥在水稻上的推广应用，通过田间小区试验，研究不同氮肥施用条件（氮肥种类及施用量）对早稻功能叶光合特性及产量的影响。结果表明，与对照相比（不施氮肥），施氮肥处理能显著增加早稻功能叶叶绿素含量，提高叶片的净光合速率、气孔导度、蒸腾速率，降低叶片胞间 CO2浓度，增强光合性能，从而促进早稻产量提高；与普通尿素处理相比，等氮量控释氮肥处理早稻前期叶片叶绿素含量较低，但后期能维持较高水平，且等氮量控释氮肥处理比普通尿素处理的叶片净光合速率更强，产量更高；控释氮肥减量10％处理与普通尿素处理相比，叶片叶绿素含量、净光合速率及产量有所下降，但差异不显著。
위명학공석담비재수도생산중적괄의용량，촉진공석담비재수도상적추엄응용，통과전간소구시험，연구불동담비시용조건（담비충류급시용량）대조도공능협광합특성급산량적영향。결과표명，여대조상비（불시담비），시담비처리능현저증가조도공능협협록소함량，제고협편적정광합속솔、기공도도、증등속솔，강저협편포간 CO2농도，증강광합성능，종이촉진조도산량제고；여보통뇨소처리상비，등담량공석담비처리조도전기협편협록소함량교저，단후기능유지교고수평，차등담량공석담비처리비보통뇨소처리적협편정광합속솔경강，산량경고；공석담비감량10％처리여보통뇨소처리상비，협편협록소함량、정광합속솔급산량유소하강，단차이불현저。
The effects of different nitrogen application patterns on photosynthetic characteristics and yield of early rice were studied by the field plot experiment to determine rational application amount of controlled-release nitrogen and promote application of controlled-release nitrogen in rice production.The results showed that nitrogen application could significantly increase leaf chlorophyll content, net photosynthetic rate, stomatal conductance, and transpiration rate, decrease leaf intercellular CO2 concentration and improve photosynthetic performance of early rice compared with CK (without nitrogen application).The leaf chlorophyll content of early rice applied with controlled-release nitrogen with the same nitrogen amount was low at earlier stage but maintain the higher level at later stage compared with the common urea treatment.Leaf chlorophyll content,net photosynthetic rate and rice yield of 90%controlled-release nitrogen treatment was lower than the common urea treatment but the difference between two treatments was no significance.In conclusion,applying controlled-release urea can reduce nitrogen application amount and nitrogen pollution in rice production.