植物营养与肥料学报2013，Vol.19Issue(1)：11-19,9.DOI:10.11674/zwyf.2013.0102
不同施肥决策对冬小麦生长影响的高光谱监测及对比分析
Monitoring influence of different fertilization decision treatments on winter wheat growth using hyperspectral spectrum and comparative analysis
摘要
Abstract
In order to clarify the characteristics of canopy spectrum of winter wheat under the condition of different fertilizations, and to select the best variable fertilization algorithm, a field experiment was conducted in the year 2006 during winter wheat growth period. The indices of winter wheat including canopy spectrum and yields under six different fertilizer treatments were studied. The results show that through the analysis of the canopy spectral reflectance after the fertilization, variations of the reflectance before and after the fertilization, and the normalized difference vegetation index in different growth stages, there are some differences of canopy reflectance in winter wheat under different fertilizer treatments. The fertilization algorithm based on the spectral index and crop growth model (Z) is the best one. Compared with the uniform fertilization (W) and no fertilization (CK) , the variable fertilizer treatments improve wheat yields significantly, the variation coefficients of yield are reduced, except the treatment based on soil nutrient (T) , and the one of fertilization treatment based on the normalized SPAD value (S) is the smallest. The Z variable rate fertilization algorithm is the best in combined effect and the S variable fertilization algorithm is better in reducing yield variability. The effect of fertilization at the jointing stage on the wheat growth at the flowering or early filling stages is the biggest. A significantly correlation is observed between the vegetation indexes at the flowering or early filling stages and yield, especially Red-edge triangular vegetation index ( RTVI) (r =0. 700) , so we can use RTVI index to predict grain yield of winter wheat.关键词
冬小麦/变量施肥/反射率变化量/对比分析Key words
winter wheat/ variable-rate fertilizer application/ reflectivity variation/ comparative analysis分类
农业科技引用本文复制引用
崔贝,黄文江,杨武德,宋晓宇,陈立平,冯美臣,张东彦,张竞成..不同施肥决策对冬小麦生长影响的高光谱监测及对比分析[J].植物营养与肥料学报,2013,19(1):11-19,9.基金项目
国家"973"项目(2011CB311806) （2011CB311806）
国家自然科学基金(41201326,31071324,41071228)项目资助. （41201326,31071324,41071228）
