不同硬实率紫花苜蓿种子的近红外光谱分析

发布时间：2018-01-14 18:23

本文关键词：不同硬实率紫花苜蓿种子的近红外光谱分析　出处：《光谱学与光谱分析》2016年03期 　论文类型：期刊论文

【摘要】：紫花苜蓿是我国北方重要的栽培牧草,由于其种子硬实率高达20%~80%,在播种时无法快速辨别硬实种子而影响其种用价值,对实际生产造成了直接影响。为研究出快速无损分选苜蓿硬实种子和非硬实种子的方法,选取不同产地、不同收获年份、不同品种的紫花苜蓿种子样品121份,同时经人工配比获得不同硬实比率的紫花苜蓿种子样品共31份,利用近红外光谱技术,采用偏最小二乘法,对其硬实率进行了分析,建立紫花苜蓿种子硬实率的近红外光谱分析模型,为紫花苜蓿硬实种子的快速检测和识别技术进行探索性研究。结果表明,最终获得的光谱模型建模相关系数(R2cal)为0.981 6,交叉检验标准误差(RMSECV)为5.32,相对标准误差(RPD)为3.58,模型的预测能力相对较好,能够应用于紫花苜蓿种子硬实率的估测,为种子硬实率的无损检测提供了一种新方法。模型的建立为研究出快速无损确定种子硬实特性方法提供技术指导,促进种子硬实特性的深入研究。
[Abstract]:Alfalfa grass cultivation in northern China is important, because of its hard seed rate is as high as 20%~80%, at the time of seeding can quickly identify the hard seeds and affect the seed value, has a direct impact on the actual production. In order to develop rapid and non-destructive sorting of hard seeds of alfalfa and non hard seeds method, selection of different producing areas. Different harvest year, alfalfa seed samples of 121 different varieties, while the ratio of different ratio by artificial hard alfalfa seeds of 31 samples by using near infrared spectroscopy, using partial least squares method, the hard seed rate were analyzed to establish near infrared spectroscopy of alfalfa seed rate analysis model for technology for rapid detection and identification of alfalfa seed were studied. The results show that the spectral correlation coefficient model obtained was 0.9816 (R2cal), cross validation Standard error (RMSECV) is 5.32, the relative standard deviation (RPD) was 3.58. The prediction ability of the model is relatively good, can be used to estimate the rate of hard alfalfa seeds, which provides a new method for nondestructive testing of hard seed rate. The model of rapid non-destructive determine Hardseededness method technical guidance, promote the in-depth study of Hardseededness.

【作者单位】：中国农业大学草业科学系草业科学北京市重点实验室;赤峰市农牧科学研究院草原研究所;
【基金】：现代牧草产业技术体系项目(CARS-35) 中央高校基本科研业务费专项资金项目(2014JD025)资助
【分类号】：S541.9;O657.33
【正文快照】： 引言紫花苜蓿(Medicago sativa L.)是一种重要的优质豆科牧草,在世界范围内种植面积大、用途广。但是,由于紫花苜蓿的种子具有硬实特性,对苜蓿的研究工作和产业化生产造成一定的影响。硬实普遍存在于豆科植物种子中,研究证明,硬实种子的活力、抗逆表现及耐贮藏性能等都高于非

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