摘要
为明确与烟叶全氮含量显著相关的颜色特征参数,利用多元逐步回归分析,建立烟叶全氮含量的颜色特征值诊断模型,分析不同氮肥用量下叶片颜色特征值与烟叶全氮含量及叶绿素(以SPAD值表示)的关系。结果表明,不同氮肥用量下,烤烟对氮素含量变化最敏感的时期为旺长期。颜色特征值[红色(red, R),绿色(green, G),蓝色(blue, B),亮度(lightness, L)]与叶片SPAD值之间呈显著负相关(P<0.05),其相关系数表现为r_(R)(0.728)>r_(L)(0.706)>r_(G)(0.649)>r_(B)(0.477)。烟叶全氮含量与颜色特征值L、R、G、L/(R+G)、B/R、B/G、L/B、R+B、B+G、R+B+G+L、R/(G+B)、R+B/(R+B+G)呈显著相关(P<0.05)。利用叶片全氮含量和颜色特征值进行多元逐步回归分析,构建氮素诊断模型,模型达到显著水平(P<0.05),对该模型进行验证,实测值与模拟值的相关性达到极显著水平(P<0.01)。因此,模型可用于指导烤烟生长期的氮素营养诊断,可方便、快捷地诊断烤烟叶片全氮含量,为智慧农业的发展提供理论依据。
In order to clarify the color characteristic parameters significantly related to the total nitrogen content of tobacco leaves,the relationship between the leaf color characteristic value and the total nitrogen content and chlorophyll(expressed by SPAD value)of tobacco leaves under different nitrogen application rates was analyzed,and the color characteristic value diagnosis model of total nitrogen content of tobacco leaves was established by multiple stepwise regression analysis.The results showed that,under different nitrogen application rates,the most sensitive period to the change of nitrogen content was fast growing period.There was a significant negative correlation(P<0.05)between color characteristic values(red,R;green,G;blue,B;lightness,L)and leaf SPAD values,which the correlation coefficient showed as r_(R)(0.728)>r_(L)(0.706)>r_(G)(0.649)>r_(B)(0.477).There was significant correlation(P<0.05)between total nitrogen content and color characteristic values L,R,G,L/(R+G),B/R,B/G,L/B,R+B,B+G,R+B+G+L,R/(G+B)and R+B/(R+B+G).The nitrogen diagnosis model was established by multiple stepwise regression analysis using the characteristic values of leaf total nitrogen content and color characteristic values,which was significant at P<0.05 level.The model was verified,and the correlation between the measured value and the simulated value reached significant at P<0.01 level.The model of leaf color characteristic and leaf total nitrogen content of flue-cured tobacco could be used to guide the nitrogen nutrition diagnosis of flue-cured tobacco during the growth period,which provided a theoretical basis for smart agriculture in the future.
作者
朱莹雪
王琪
马献发
焦玉生
高金旭
毛卫佳
付佳
孙雪岽
元野
ZHU Yingxue;WANG Qi;MA Xianfa;JIAO Yusheng;GAO Jinxu;MAO Weijia;FU Jia;SUN Xuedong;YUAN Ye(College of Resources and Environment,Northeast Agricultural University,Harbin 150030,China;Mudanjiang Tobacco Science Research Institute of Heilongjiang Branch of China Tobacco Corporation,Harbin 150076,China;Heilongjiang Tobacco Company Mudanjiang Tobacco Company,Heilongjiang Mudanjiang 157011,China;China Tobacco General Company Heilongjiang Company,Harbin 150001,China;Boli Branch of Mudanjiang Tobacco Company,Heilongjiang Qitaihe 154500,China)
出处
《中国农业科技导报》
CAS
CSCD
北大核心
2023年第7期54-62,共9页
Journal of Agricultural Science and Technology
基金
黑龙江省教育厅项目(1451ZD005)
烟草行业科研项目(110201902004,20182300002700081,2019230000240083)。
关键词
烟叶
颜色特征值
氮素
叶绿素
tobacco leaf
color characteristic value
nitrogen
chlorophyll
