One-time application of controlled-release bulk blending fertilizer enhances yield,quality and photosynthetic efficiency in late japonica rice  

作　　者：Canping Dun Rui Wang Kailiang Mi Yuting Zhang Haipeng Zhang Peiyuan Cui Yanle Guo Hao Lu Hongcheng Zhang 

机构地区：[1]Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province,Yangzhou University,Yangzhou 225009,China [2]College of Horticulture and Landscape Architecture,Jinling Institute of Technology,Nanjing 210038,China

出　　处：《Journal of Integrative Agriculture》2024年第11期3672-3691,共20页农业科学学报（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province,China(BK20220563);the Key R&D Program of Jiangsu Province,China(BE2022338);the Colleges and Universities in Jiangsu Province Natural Science Foundation of China(19KJB210014)。

摘　　要：Controlled-release urea(CRU)releases nitrogen(N)at the same pace that rice takes it up,which can effectively improve N use efficiency,increase rice yield and improve rice quality.However,few studies have described the effects of CRU application on the photosynthetic rate and endogenous enzyme activities of rice.Accordingly,a twoyear field trial was conducted with a total of seven treatments:CK,no N fertilizer;BBF,regular blended fertilizer;RBBF,20%N-reduced regular blended fertilizer;CRF1,70%CRU+30%regular urea one-time base application;CRF2,60%CRU+40%regular urea one-time base application;RCRF1,CRF1 treatment with 20%N reduction;and RCRF2,CRF2 treatment with 20%N reduction.Each treatment was conducted in triplicate.The results showed that the N recovery efficiency(NRE)of the controlled-release bulk blending fertilizer(CRBBF)treatments was significantly greater over the two years.There were significant yield increases of 4.1–5.9%under the CRF1treatment and 5.6–7.6%under the CRF2 treatment compared to the BBF treatment,but the differences between the reduced-N treatments RBBF and RCRF2 were not significant.Photosynthetic rates under the CRF1 and CRF2treatments were significantly higher than under the other treatments,and they had significantly greater RuBPCase,RuBisCO,glutamate synthase(GOGAT)and glutamine synthetase(GS)enzyme activities.Additionally,the soil NH_(4)^(+)-N and NO_(3)^(–)-N contents under the CRBBF treatments were significantly higher at the late growth stage of rice,which was more in-line with the fertilizer requirements of rice throughout the reproductive period.CRBBF also led to some improvement in rice quality.Compared with the BBF and RBBF treatments,the protein contents under the CRBBF treatments were reduced but the milling,appearance,eating and cooking qualities of the rice were improved.These results showed that the application of CRBBF can improve the NRE,photosynthetic rate and endogenous enzyme activities of rice,ensuring sufficient N nutrition and photosynthetic material productio

关 键 词：controlled-release bulk blending fertilizer yield QUALITY photosynthetic rate endogenous enzyme activity 

分 类 号：S511.22[农业科学—作物学]