低氮条件下L-色氨酸对高粱生长发育的影响  

Effects of L-Tryptophan on Growth and Development of Sorghum under Low Nitrogen Condition

作　　者：李俊志 王晓东 窦爽 辛宗绪 吴宏生 周宇飞[2] 肖继兵 Li Junzhi;Wang Xiaodong;Dou Shuang;Xin Zongxu;Wu Hongsheng;Zhou Yufei;Xiao Jibing(Liaoning Institute of Agriculture and Forestry in Arid,Chaoyang 122000,Liaoning,China;Agronomy College of Shenyang Agricultural University,Shenyang 110866,Liaoning,China)

机构地区：[1]辽宁省旱地农林研究所,辽宁朝阳122000 [2]沈阳农业大学农学院,辽宁朝阳110866

出　　处：《作物杂志》2024年第5期175-180,共6页Crops

基　　金：国家现代农业产业技术体系(CARS-06-14.5-B16)。

摘　　要：为研究低氮环境下外源色氨酸对高粱生长发育的影响,在大田试验条件下,采用裂区试验设计,以优质糯高粱品种冀酿3号为试验材料,设2个施氮水平,常规施用氮肥的1/3用量(N1)和常规氮肥用量(N2),采用叶面喷施清水(Y1)和50 mg/L色氨酸(Y2),于高粱拔节期进行喷施,研究不同处理下高粱叶片光合特性、农艺性状及产量。结果表明,在N1和N2水平下,Y2处理能够提高高粱叶片净光合速率(P_(n))和叶绿素相对含量(SPAD值),显著增加产量、千粒重和穗粒重,其产量相较于Y1处理分别增加1.91%和6.70%。不同处理组合中,喷施外源色氨酸处理能够降低株高,增加茎粗、穗长和叶面积。因此,在低氮条件下,于高粱拔节期喷施色氨酸,有利于提高籽粒产量、千粒重、茎粗和穗长,降低株高,降低倒伏风险,有利于提高高粱SPAD值和P_(n),增加粒重,促进增产增收。In order to promote environmentally friendly and productive sorghum farming methods in the western Liaoning region,it is important to investigate the effects of exogenous tryptophan on the photosynthetic properties and yield of sorghum in low nitrogen environments.A split plot design was employed in field experiments,with premium glutinous sorghum variety Jiniang 3 serving as the experimental material.Two nitrogen application levels were set,with one-third of the conventional nitrogen fertilizer amount(N1)and conventional nitrogen fertilizer amount(N2)applied.Clear water(Y1)and 50 mg/L tryptophan(Y2)were sprayed on the leaves during the sorghum jointing stage to study the photosynthetic characteristics,agronomic traits,and yield.The results showed that under N1 and N2 levels,spraying tryptophan(Y2)could increase the net photosynthetic rate(Pn)and chlorophyll relative content(SPAD value)of sorghum leaves,significantly increasing yield,1000-grain weight,and panicle weight.Compared to Y1 treatment,the yield were increased by 1.91%and 6.70%,respectively.In different treatment combinations,spraying exogenous tryptophan could reduce plant height,increase stem diameter,panicle length,and leaf area.Therefore,under low nitrogen conditions,spraying tryptophan during the jointing stage of sorghum was beneficial for increasing grain yield,1000-grain weight,stem diameter,and panicle length,reducing plant height and lodging risk,increasing SPAD value and Pn,increasing grain weight,and promoting yield and income increase.

关 键 词：施氮量 色氨酸 高粱 光合特性 农艺性状 产量 

分 类 号：S514[农业科学—作物学]