干旱地区农业研究2017，Vol.35Issue(2)：157-165,9.DOI:10.7606/j.issn.1000-7601.2017.02.25
基于高光谱‘叶尔羌’扁桃氮磷钾含量估测模型研究
Prediction on nitrogen, phosphorus, potassium contents in almond leaves based on Yarkent Models by hyper spectrum
摘要
Abstract
To establish a model to estimate foliar nitrogen,phosphorus and potassium contents in leaves,analysis in correlation between foliar nitrogen (N),phosphorus (P),and potassium (K) contents,providing effective,timely and nondestructive nutrition diagnosis for Yarkent almond.Based on effect by the experiment of using 3414 fertilizer,Unispec -SC spectrometer was employed to determine leaf spectral reflectance of Yarkent almond under different N,P and K fertilizer levels at fruiting,swelling,hardcoring and maturing stages in Shache.In addition,correlation analysis and regression analysis methods were carried out for statistical analysis.The results showed that the spectral sensitive bands of foliar N,P and K elements are different at fruiting,swelling,hardcoring and maturing stages.There is a certain relationship between leaf N,P and K contents and the spectral reflectance or its derivative variables.The R2 value of the fitting Cubics Ration and quadratic curve equation was high when the two spectral reflectances were used as independent variables,and the N,P,and K contents as the dependent variables.The best model for Yarkent almond leaf nitrogen nutrition diagnosis at the fruiting stage is Y =-2051.4471-7099.5965 X-6048.4479X2,X =lgRs23 + lgRsso;The best model for Yarkent almond leaf nitrogen nutrition diagnosis at the swelling stage is Y =(21.8812 + 39.8456X + 24.3772X2 + 5.1255X3)/(0.005188X3),X =1gR382 + lgR383;The best model for Yarkent almond leaf phosphorus nutrition diagnosis at the fruiting stage is Y =(-0.000003 + 0.000803X-0.070160X2 + 2.8169X3)/(0.407026X3),X =lg(R789 + R790);The best model for Yarkent almond leaf potassium nutrition diagnosis at the fruiting stage is Y =(-7.7960 + 22.5853X-21.8023X2 + 7.0133X3/0.000032X3,X =R830 + R850.In conclusion,the spectral sensitive bands of N,P and K elements are different at these four phenological stages for Yarkent almond fruit development.The models for estimating foliar N,K and P content of Yarkent almond can be established according to the spectral sensitivity,spectral reflectance or its derivative variables.关键词
‘叶尔羌’扁桃/叶片/N含量/P含量/K含量/光谱分析/相关分析/回归分析Key words
Yarkent almond/leaf/nitrogen content/phosphorus content/potassium content/spectral analysis/correlation analysis/regression analysis分类
农业科技引用本文复制引用
庄红梅,卢春生,龚鹏,谢辉,徐叶挺,樊丁宇,张雯..基于高光谱‘叶尔羌’扁桃氮磷钾含量估测模型研究[J].干旱地区农业研究,2017,35(2):157-165,9.基金项目
新疆维吾尔自治区科技重大专项(201130102-2) （201130102-2）
新疆维吾尔自治区科技计划(201111121) （201111121）
公益性行业(农业)科研专项(201003043) （农业）
