基质含水率对毯状烟苗生长及根系盘结力的影响  

Effects of Substrate Moisture Content on Plant-growth and Root-knotting Force of Tobacco Seedlings

作　　者：吴金洋 王朋 薛博[3] 刘小磊 闫鼎[4] 吴会才 刘国良 王程栋[1] 石松柏[6] WU Jinyang;WANG Peng;XUE Bo;LIU Xiaolei;YAN Ding;WU Huicai;LIU Guoliang;WANG Chengdong*;SHI Songbai(Institute of Tobacco Research of CAAS/Key Laboratory of Tobacco Biology and Processing,Ministry of Agriculture and Rural Affairs,Qingdao 266101,China;Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081,China;Shandong Weifang Tobacco Limited Company,Weifang 262606,Shandong,China;Shanghai Tobacco Group Company Limited,Shanghai 200020,China;Shandong Laiwu Tobacco Company Limited,Jinan 271100,China;Panzhihua Branch of Sichuan Tobacco Company,Panzhihua 617026,Sichuan,China)

机构地区：[1]中国农业科学院烟草研究所/农业农村部烟草生物学与加工重点实验室,青岛266101 [2]中国农业科学院研究生院,北京100081 [3]山东潍坊烟草有限公司,山东潍坊262606 [4]上海烟草集团有限责任公司,上海200020 [5]山东省莱芜烟草有限公司,济南271100 [6]四川省烟草公司攀枝花市公司,四川攀枝花617026

出　　处：《中国烟草科学》2024年第5期25-32,共8页Chinese Tobacco Science

基　　金：上海烟草集团有限责任公司科技项目(40737);中国烟草总公司四川省公司科技项目(SCYC202110);中国烟草总公司山东省公司科技项目(202305)。

摘　　要：为培育适宜于高速机插式烟草移栽机的毯状烟苗,实现烟苗农艺性状与移栽机械相融合。本研究在烟苗4叶1心至成苗期,设置3个不同基质体积含水率处理:25%(W1)、35%(W2)和45%(W3),探究基质含水率对毯状烟苗生长及根系盘结力的影响。结果表明,基质不同含水率处理后15天内,W2的烟草毯状苗株高、地上部干质量、总根长、根系总表面积和根系总体积显著大于W1和W3,3个处理间根系盘结力无显著差异。基质不同含水率处理后30天,W1的根系干质量、总根长、根系总表面积等指标显著大于W2和W3;W1和W2根系盘结力显著大于W3,分别高出W3处理21.96%和15.59%。综上,烟苗4叶1心至5叶1心(水分处理后0~15天)基质体积含水率在35%左右,5叶1心至7叶1心(水分处理后15~30天)基质体积含水率在25%左右,更有利于毯状烟苗发育,并促进其根系的生长和根系盘结力的提高。The optimization of blanket-seedling culture technology can further integrate tobacco-agronomic characteristics and modern agricultural machinery.To explore the effects of volumetric substrate water content on the growth and root root-knotting force of blanket tobacco seedlings,three different substrate water content treatments were set up in this study for tobacco seedlings from 4 leaves and 1 center to the adult seedling stage,which were 25%(W1),35%(W2)and 45%(W3),respectively.The results showed that the plant height,shoot biomass,total root length,total root surface area,and total root volume of tobacco blanket seedlings of W2 were better than those of W1 and W3 after 15 days of treatment.However,there was no root-knotting force difference among the three treatments.At 30 days,the root dry mass,total root length,and total root surface area of W1 were significantly higher than those of W2 and W3.And the root-knotting force of W1 and W2 was significantly higher than that of W3,increasing by 21.96%and 15.59%,respectively.In summary,a substrate water content of about 35%for 4 leaves and 1 center to 5 leaves and 1 center(0~15 days after moisture treatment),and about 25%for 5 leaves and 1 center to 7 leaves and 1 center(15~30 days after moisture treatment)is more conducive to the development of tobacco seedlings,including promoting root systems growth and improving root-knotting force.

关 键 词：烟草 毯状苗 基质含水率 表型 根系盘结力 

分 类 号：S572.01[农业科学—烟草工业]