核农学报2025，Vol.39Issue(8)：1775-1785,11.DOI:10.11869/j.issn.1000-8551.2025.08.1775
间作模式对玉米/大豆间作系统光合、产量及种间竞争力的影响
Effects of Intercropping Patterns on Photosynthesis,Yield and Interspecific Competitiveness of Maize/Soybean Intercropping System
摘要
Abstract
In order to explore the effect of intercropping patterns of maize/soybean intercropping system,maize Denghai 605 and soybean Qihuang 34 were used as experimental materials,and four intercropping patterns were set up:2 rows of maize/4 rows of soybean(T2∶4),2 rows of maize/6 rows of soybean(T2∶6),3 rows of maize/4 rows of soybean(T3∶4),3 rows of maize/6 rows of soybean(T3∶6),and maize monoculture(CKM)and soybean monoculture(CKS)were used as control.The effects of different intercropping patterns on crop agronomic traits,photosynthetic characteristics,yield value,yield advantage index and interspecific competitiveness were measured.The results showed that ear length,ear diameter,ear row number,grain weight per ear and leaf photosynthetic indexes(Tr、Gs、Pn、Ci)at R1 and R5 stages were better than those of T3∶4 and CKM at T2∶6,T2∶4 and T3∶6,respectively.Branches,effective pods,seed number per plant and leaf photosynthetic indexes(Tr,Gs,Pn)of R2 and R6 stages were all lower than CKS,Ci was higher than CKS,and T2∶6,T2∶4,T3∶6 models were all better than T3∶4.The total yield and output value of T2∶6,T2∶4,T3∶6 intercropping systems were higher than those of T3∶4 and CKM.Compared to CKM,the total yield was increased by 8.22％,6.51％,5.91％,and the total output value was increased by 39.46％,31.55％,31.26％,respectively.The land equivalent ratio(LER)values ranged from 1.32 to 1.51,the intercropping advantage(IA)values ranged from 3 981.41 to 5 460.26 kg·hm-2,the actual yield loss(AFL)values ranged from 0.67 to 1.60,and the relative crowding index(K)values ranged from 6.69 to 11.82,all of which had yield advantages,especially in T2∶6,T2∶4 and T3∶6 modes.Under the model of T2∶6,the soybean competition ratio(CRs)was greater than 1,the maize competition ratio(CRm)was less than 1,the maize aggressiveness(Am)was less than 0,and the soybean aggressiveness(As)was greater than 0 incdicating that the competitive ability of soybean was stronger than that of maize,and under other patterns,maize was stronger.In conclusion,the intercropping patterns not only optimize the agronomic traits of maize,but also effectively reduced the shading and shading effects of maize on soybean,improved the photosynthetic performance of crops,and then increased the total yield and output value of the intercropping system.The T2∶6 pattern was the best,followed by T2∶4 and T3∶6.This study has important theoretical guidance and practical significance for promoting maize/soybean intercropping and exploring crop yield potential in northwest Shandong Province.关键词
玉米/大豆间作/间作模式/光合/产量优势/种间竞争力Key words
maize/soybean intercropping/intercropping pattern/photosynthesis/yield advantage/interspecific competitiveness引用本文复制引用
田艺心,朱金英,李春燕,朱冠雄,高祺,王春雨,华方静,高凤菊..间作模式对玉米/大豆间作系统光合、产量及种间竞争力的影响[J].核农学报,2025,39(8):1775-1785,11.基金项目
国家现代农业产业技术体系建设专项(CARS-04-CES14),公益性行业(农业)专项经费资助(LNZZ2022055) （CARS-04-CES14）
