CAJ | 학술논문

[目的]为大白菜高产、优质、经济施肥提供科学依据。[方法]以津秋1号为试材,设8个处理,采用随机区组排列,研究不同氮肥用量对保护地大白菜产量、产值、产投比、净效益和硝酸盐含量等的影响。[结果]在保护地大白菜生产过程中增施适当的氮肥具有明显的增产效果,产值、产投比与净效益也相应增加,过量施用氮肥产量、产值、产投比和净效益均下降;在不施氮磷钾化学肥料的条件下,增施有机肥,增产效果明显;增施氮肥,硝酸盐含量也随之增加,当增加到一定程度时,硝酸盐含量基本保持不变。[结论]仪征市大白菜最佳施氮量为750.0 kg/hm2,此时产量为104 746.9 kg/hm2,净效益为45 330.8元/hm2,产投比为4.0。
[목적]위대백채고산、우질、경제시비제공과학의거。[방법]이진추1호위시재,설8개처리,채용수궤구조배렬,연구불동담비용량대보호지대백채산량、산치、산투비、정효익화초산염함량등적영향。[결과]재보호지대백채생산과정중증시괄당적담비구유명현적증산효과,산치、산투비여정효익야상응증가,과량시용담비산량、산치、산투비화정효익균하강;재불시담린갑화학비료적조건하,증시유궤비,증산효과명현;증시담비,초산염함량야수지증가,당증가도일정정도시,초산염함량기본보지불변。[결론]의정시대백채최가시담량위750.0 kg/hm2,차시산량위104 746.9 kg/hm2,정효익위45 330.8원/hm2,산투비위4.0。
[Objective] The aim was to provide the scientific basis for high yield,high quality and economic fertilization in Chinese cabbage.[Method] With Jinqiu1 as tested materials,using randomized block arrangements,eight treatments were set up to study the effects of different nitrogen application on yield,output value,the ratio of output to input,net benefit and the nitrate content of Chinese cabbage in protected field.[Result] Increasing application of nitrogenous fertilizer achieved obvious stimulation effect and raised output value,the ratio of output to input and net benefit.While the excessive application of nitrogen fertilizer reduced yield,output value,the ratio of output to input and net benefit.Without the application of nitrogen,phosphorus and potassium,increasing application of organic fertilizer increased yield obviously.The nitrate content increased with the increasing application of nitrogenous fertilizer,and kept invariable basically when the application of nitrogenous fertilizer increased to some extent.[Conclusion] The best application of nitrogenous fertilizer in Yizheng city was 750.0 kg/hm2,and the yield was 104 746.9 kg/hm2,the net benefit was 45 330.8 yuan/hm2,the ratio of output to input was 4.0.