Effects of water,fertilizer,dissolved oxygen and temperature coupling on the photosynthesis,quality and yield of lettuce  

作　　者：Zan Ouyang Juncang Tian 

机构地区：[1]College of Water Resources and Civil Engineering,Hunan Agricultural University,Changsha 410128,China [2]School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China [3]Engineering and Technology Research Center of Water-Saving Irrigation and Water Resource Regulation in Ningxia,Ningxia University,Yinchuan 750021,China [4]Engineering Research Center for Efficient Utilization of Water Resources in Modern Agricultural in Arid Regions,Ministry of Education,Yinchuan 750021,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第5期132-141,共10页国际农业与生物工程学报（英文）

基　　金：supported by Ningxia Hui Autonomous Region Key Research and Development Plan Major Project(2018BBF02022);National Natural Science Foundation of China(51469027,51869024);Ningxia Hui Autonomous Region Colleges and Universities First-Class Subject Construction Project(NXYLXK2021A03,NXYLXK2017A03);Natural Science Foundation of Changsha(kq2208080);Scientific Research Project of Hunan Provincial Education Department(22B0226),Water Resources Science and Technology Project of Hunan Province(XSKJ2023059-46).

摘　　要：With the increased demand for vegetables of nutritional value,enhancing vegetable quality while pursuing high yield has become a goal of many investigators.In the present study,the effects of irrigation quota(A),fertilizer amount(B),dissolved oxygen(DO,C),and temperature in the climate chamber(D)applied in combination with the quality and yield of lettuce were investigated.Four-factor and three-level orthogonal designs were used to determine the single-factor trend,the sequence of primary and secondary influencing factors,and optimal regulatory measures concerning the lettuce.The order of the primary and secondary effects on the plant height,net photosynthesis rate(P_(n)),transpiration rate(E),vitamin C content(V_(c)),soluble protein content(S_(p)),dry matter accumulation(Dm),yield,irrigation water use efficiency(IWUE)of the lettuce plants followed the order A>B>D>C.In addition,the order of the primary and secondary effects on the intercellular carbon dioxide concentration(C_(i)),chlorophyll content,and nitrate content followed the order A>D>B>C.The optimum scheme for lettuce was A3B2C1D3(irrigation quota of 69 mm;fertilizer amount of 1.30 g/pot;DO of 6.5 mg/L;and temperature in the climate chamber of 20℃).Under the coordinated regulation of water,fertilizer,air,and temperature,the quality and yield of lettuce have been significantly improved.This study had important reference significance for the comprehensive regulation of water,fertilizer,air,and temperature facilities for vegetables.

关 键 词：Aerated irrigation Increased-temperature irrigation Growth PHOTOSYNTHESIS Dry matter accumulation Principal component analysis 

分 类 号：S636.2[农业科学—蔬菜学]