CAJ | 학술논문

在江苏沿江地区研究了“麦－稻”两熟制稻田麦秸全量还田下氮肥运筹对水稻生产效益及氮肥效率的影响。结果表明：在常规氮肥运筹比例（基肥40％、蘖肥20％、穗肥40％）下，随施氮量的增加，水稻产值、纯收益、新增纯收益率和边际成本报酬率均表现出先增加后降低的趋势，这4项指标分别在施氮量355．26、342．11、338．17和300．00 kg／hm2条件下可获得最高的理论值；氮表观生产力随施氮量的增加而下降，施氮量每增加10 kg／hm2则氮表观生产力理论上降低0．89；施氮量为180～300 kg／hm2的处理具有相对较高的施氮增产力；在施氮量为300 kg／hm2的条件下，基肥40％、蘖肥30％、穗肥30％处理具有良好的水稻生产效益以及较高的氮表观生产力和施氮增产力。
재강소연강지구연구료“맥－도”량숙제도전맥갈전량환전하담비운주대수도생산효익급담비효솔적영향。결과표명：재상규담비운주비례（기비40％、얼비20％、수비40％）하，수시담량적증가，수도산치、순수익、신증순수익솔화변제성본보수솔균표현출선증가후강저적추세，저4항지표분별재시담량355．26、342．11、338．17화300．00 kg／hm2조건하가획득최고적이론치；담표관생산력수시담량적증가이하강，시담량매증가10 kg／hm2칙담표관생산력이론상강저0．89；시담량위180～300 kg／hm2적처리구유상대교고적시담증산력；재시담량위300 kg／hm2적조건하，기비40％、얼비30％、수비30％처리구유량호적수도생산효익이급교고적담표관생산력화시담증산력。
A field experiment was carried out to study the effects of nitrogen ( N) fertilizer application on the production bene-fits and N fertilizer use efficiency of rice in the riparian area of Jiangsu under the condition of returning all straw of preceding crop wheat to paddy field.The results showed that:under the conventional N fertilizer application proportion (40%base fertilizer, 20%tillering fertilizer, and 40%panical fertilizer) , the production value, net income, newly-increased net income rate, and marginal cost return rate of rice all increased first and then decreased when the application rate of N increased.These four indexes could reach the highest theoretical value when the application rate of N was 355.26, 342.11, 338.17 and 300.00 kg/hm2 , respectively.The ap-parent productivity of N decreased with the increase in the application rate of N, and the former was theoretically decreased by 0.89 when the latter was increased by 10 kg/hm2 .The treatments of applying 180~300 kg/hm2 N had higher N-applying yield-increasing capacity. Under the condition of applying 300 kg/hm2 N, the N application proportion of 40%base fertilizer, 30%tillering fertilizer and 30%panical fertilizer could obtain better rice production benefits, and higher N apparent productivity and N-applying yield-in-creasing capacity .