Estimating harvest index of winter wheat from canopy spectral reflectance information
文献类型：期刊论文
| 作者 | Li, Heli(李贺丽) ; Luo, Yi ; Xue, Xiaoping ; Zhao, Yujin ; Zhao, Hong ; Li, Feng |
| 刊名 | JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT
 |
| 出版日期 | 2011 |
| 卷号 | 9期号:3-4页码:420-425 |
| 关键词 | Harvest index spectral reflectance vegetation indices winter wheat |
| 通讯作者 | Luo, Yi |
| 英文摘要 | Harvest index (HI), ratio of grain yield to above-ground biomass, is a key parameter for crop yield prediction via remote sensing based on radiation use efficiency approach or crop simulation models. Thus, for an accurate estimation of grain yield, an accurate estimate of HI is very important. Experiments including five nitrogen treatments were conducted at field level to investigate the feasibility of estimating HI of winter wheat from canopy spectral reflectance information in present study. Total nine common vegetation indices (VIs), such as normalized difference vegetation index (NDVI), ratio vegetation index (RVI), transformed vegetation index (TVI), soil adjusted vegetation index (SAVI), modified soil adjusted vegetation index (MSAVI), renormalized difference vegetation index (RDVI), difference vegetation index (DVI), enhanced vegetation index (EVI) and green chlorophyll index (CI(green)), were investigated in this work. Results demonstrated that estimating HI from canopy reflectance information based on the partitioning of crop activity before and after flowering can give good results but required long-term dataset of total growing season. Further analysis showed that HI had strong correlations with the accumulated values of VIs from anthesis to maturity period. Moreover, it was found that the correlation between HI and accumulated VI after anthesis was greatly improved by introducing another variable of VI at anthesis using binary regression analysis. The coefficients of determination (R(2)) of binary regression equations were higher than 0.80, and the root mean square deviations (RMSD) between the estimated HI and measured HI were as low as 0.04. It was suggested canopy spectral reflectance from anthesis to maturity had good performances on HI estimation. With short-term data requirement and good accuracy, the method based on VI dataset of anthesis-maturity period would be more favourable for large area application since the dataset can be easily collected by means of remote sensing. |
| 收录类别 | SCI |
| 资助信息 | Chinese Academy of Sciences KSCX2-EW-B-1;National Natural Science Foundation of China 90502005 |
| 语种 | 英语 |
| 公开日期 | 2012-02-14 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/8472]  |
| 专题 | 地理科学与资源研究所_研究生部 |
| 推荐引用方式 GB/T 7714 | Li, Heli,Luo, Yi,Xue, Xiaoping,et al. Estimating harvest index of winter wheat from canopy spectral reflectance information[J]. JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT,2011,9(3-4):420-425. |
| APA | Li, Heli,Luo, Yi,Xue, Xiaoping,Zhao, Yujin,Zhao, Hong,&Li, Feng.(2011).Estimating harvest index of winter wheat from canopy spectral reflectance information.JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT,9(3-4),420-425. |
| MLA | Li, Heli,et al."Estimating harvest index of winter wheat from canopy spectral reflectance information".JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT 9.3-4(2011):420-425. |
入库方式： OAI收割
来源：地理科学与资源研究所
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