摘要
为研究聚天门冬氨酸和壳聚糖复配剂(PAC)对不同施氮量下谷子叶片光合生理特性及产量的影响,于2021-2022年在中国农业科学院作物科学研究所公主岭试验站开展大田试验,以华优谷9号为材料,设置常规氮素(CN)和PAC配合氮素(PN)的不同施氮量(0、75、112.5、150、225和337.5 kg·hm^(-2))全基施处理。结果表明,随施氮量增加,谷子叶面积指数和干物质积累量呈升高趋势,功能叶叶绿素含量、净光合速率、核酮糖-1,5-二磷酸(RuBP)羧化酶活性、磷酸烯醇式丙酮酸(PEP)羧化酶活性和产量均呈先升高后降低趋势。在同一施氮量下,PN处理可以提高谷子叶面积指数、干物质积累量、功能叶叶绿素含量、RuBP羧化酶和PEP羧化酶活性以及花期和灌浆中期净光合速率。2021和2022年PN较CN处理谷子产量增幅分别为10.43%~16.17%和3.64%~23.60%,其增产效果在中、低氮水平(75、112.5、150 kg·hm^(-2))下更为显著。综上,PAC配合适量氮肥全基施可增强谷子叶片光合能力,提高谷子产量,可作为一项增产增效的生产技术应用于我国谷子生产。
In order to investigate the effect of polyaspartic acid-chitosan(PAC)on the photosynthetic physiological characteristics and yield of foxtail millet under different nitrogen application levels,this experiment was conducted using foxtail millet variety of Huayougu 9 in Gongzhuling Experimental Station of Chinese Academy of Agricultural Sciences(43°29′55″N,124°48′43″E)in 2021 and 2022.Conventional fertilization(CN)and PAC with fertilization(PN)treatments were set under six nitrogen fertilizer application levels of 0,75,112.5,150,225 and 337.5 kg·hm^(-2).The results showed that the leaf area index and dry matter accumulation of foxtail millet showed an increasing trend,while the functional leaf chlorophyll content,photosynthetic rate,RuBPCase activity,PEPCase activity,and yield increased first and then decreased with the increase of nitrogen application.At the same nitrogen application level,PN could increase the leaf area index,the dry matter accumulation,chlorophyll content,RuBPCase and PEPCase activities of the functional leaf,and the photosynthetic rate during anthesis and mid-filling stages of the foxtail millet.Compared with CN,the yield of foxtail millet increased by 10.43%-16.17%and 3.64%-23.60% in 2021 and 2022,respectively,and its yield increase effect was more significant under the low-middle nitrogen application levels of 75,112.5 and 150 kg·hm^(-2).In conclusion,PAC combined with nitrogen fertilizer could enhance the photosynthetic capacity of foxtail millet leaves and increase grain yield under the background of one-time basic fertilizer application.This result can be applied to millet production in China as a production technology for increasing production and efficiency.
作者
陈迪苏
卢霖
闫鹏
王琦
张薇
许艳丽
于爱忠
董志强
CHEN Disu;LU Lin;YAN Peng;WANG Qi;ZHANG Wei;XU Yanli;YU Aizhong;DONG Zhiqiang(College of Agronomy,Gansu Agricultural University/State Key Laboratory of Arid Land Crop Science,Lanzhou,Gansu 730070;Institute of Crop Sciences,Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology,Ministry of Agriculture and Rural Affairs,Beijing 100081)
出处
《核农学报》
CAS
CSCD
北大核心
2024年第3期551-560,共10页
Journal of Nuclear Agricultural Sciences
基金
国家重点研发计划项目(2019YFD1001703)。
关键词
谷子
聚天门冬氨酸和壳聚糖复配剂
施氮量
光合生理
产量
foxtail millet
polyaspartic acid-chitosan
nitrogen application level
photosynthetic physiological characteristics
yield
作者简介
陈迪苏,男,主要从事作物栽培生理与化学调控研究。E-mail:407813701@qq.com;通讯作者:于爱忠,男,教授,主要从事循环农业和保护性耕作等研究。E-mail:yuaizh@gsau.edu.cn;通讯作者:董志强,男,研究员,主要从事作物栽培生理与化学调控研究。E-mail:dongzhiqiang@caas.cn。
