中国油料作物学报2024，Vol.46Issue(3)：524-535,12.DOI:10.19802/j.issn.1007-9084.2022228
盐碱地花生棉花等幅间作对花生光合特性及产量效益的影响
Effects of peanut/cotton intercropping with constant width on photosynthetic characteristics,yield,and benefits of peanut in saline-alkali soil
摘要
Abstract
To ptimize the utilization of temperature,light,and heat resources and enhance the overall benefits of agricultural production in saline-alkali land,the effects of different row positions on photosynthate accumulation,light intensity,chlorophyll fluorescence characteristics,yield,and benefit of peanut were investigated through a field experiment under a high-efficiency cropping pattern with an annual rotation of peanut/cotton 6:4 intercrop-ping.The results demonstrated that:(1)Constant amplitude peanut/cotton intercropping in salt-alkali soil signifi-cantly enhanced the main stem height,lateral branch length,and non-photochemical quenching coefficient(NPQ)of functional leaves,while substantially reducing bioaccumulation,SPAD value,leaf area index,net photosynthetic rate,transpiration rate,and yield of intercropped peanut.Simultaneously,the intercropping system increased the number of fruiting branches,boll number per plant,boll weight,yield of intercropped cotton as well as its compre-hensive economic benefit.(2)The peak radiation distribution within the canopy on both sides of the intercropped peanut row(IP1 and IP3),peanut monoculture and cotton monoculture all occurred at 12:00;However it was de-layed until 14:00 in the middle ridge of the intercropped peanut row(IP2).Moreover,the radiation intensity in IP1 and IP3 was significantly lower compared to that observed in peanut monoculture.(3)The row position significantly influenced the photosynthetic efficiency of peanut-cotton intercropping system after flowering-pegging stage.SPAD,LAI,and NPQ values in IP2 were significantly higher than those in IP1 and IP3,while there were no signifi-cant differences between IP1 and IP3.Pn,Gs,and Tr were significantly affected by location and ridge position.In Dongying site,no significant difference was found in the row position of intercropped peanut at neither growth stage.But in Gaotang site,intercropping system significantly reduced Pn,Gs,and Tr of intercropped peanut functional leaves compared to monocrops;and these 3 traits in IP2 were significantly higher than those in IP1 and IP3.Com-pared to cotton monoculture,the intercropping system increased benefit by 11.94%(Dongying)and 27.08%(Gao-tang)respectively.However,the yield of intercropped peanut and cotton were both decreased compared to monocul-ture at the two testing sites.The land equivalent ratio of intercrop-ping systems exceeded 1.02.关键词
盐碱地/花生/棉花间作/农艺性状/光合特性/效益Key words
saline-alkali land/peanut/cotton intercropping/agronomic characteristics/photosynthetic char-acteristics/benefits分类
农业科技引用本文复制引用
戴良香,丁红,张智猛,姜常松,袁光,徐扬,张冠初,郭庆,张晨,兰文斐,李帆..盐碱地花生棉花等幅间作对花生光合特性及产量效益的影响[J].中国油料作物学报,2024,46(3):524-535,12.基金项目
国家自然科学基金(31971856) （31971856）
山东省现代农业产业技术体系创新团队(花生)项目(SDAIT-04-06) （花生）
山东省农业科学院创新工程(CXGC2018B05) （CXGC2018B05）
