中国水稻科学 ›› 2024, Vol. 38 ›› Issue (1): 81-90.DOI: 10.16819/j.1001-7216.2024.230409
杨奇欣, 赖凤香, 何佳春, 魏琪, 王渭霞, 万品俊*(), 傅强*(
)
收稿日期:
2023-04-27
修回日期:
2023-09-15
出版日期:
2024-01-10
发布日期:
2024-01-16
通讯作者:
* email: 基金资助:
YANG Qixin, LAI Fengxiang, HE Jiachun, WEI Qi, WANG Weixia, WAN Pinjun*(), FU Qiang*(
)
Received:
2023-04-27
Revised:
2023-09-15
Online:
2024-01-10
Published:
2024-01-16
Contact:
* email: 摘要:
【目的】探究不同抗感水稻受褐飞虱胁迫的高光谱反射率曲线变化及敏感光谱差异,研究水稻植株不同部位的高光谱变化。在此基础上,采用机器学习技术建立水稻褐飞虱抗性鉴定模型,为下一步开发智能化褐飞虱抗性鉴定技术提供重要基础资料。【方法】以三个具不同褐飞虱抗感特征的水稻品种(TN1、Mudgo、RHT)为对象,分析其光谱、植被指数差异并建立抗性级别预测的随机森林模型。【结果】研究发现,褐飞虱胁迫天数与光谱反射率显著相关的波段数及差异显著的波段数随着水稻的抗性水平的上升而减少。同时,在680 nm左右,三个品种的光谱反射率与褐飞虫胁迫时间的相关性最好。植被指数分析表明, SIPI、SR605/760和PSNDb与抗性级别的相关系数绝对值要高于680 nm的结果。感虫品种TN1差异最早体现,中抗品种Mudgo其次,高抗品种RHT最后。不同部位的差异首先出现在第1叶叶片和第1叶叶鞘,然后依次为第2叶叶片和第2叶叶鞘以及第3叶叶片和第3叶叶鞘。预测模型的结果表明,全波段作为输入的模型效果比以单一植被指数SIPI 构建的随机森林模型更好,模型准确率达到85.9%。【结论】本研究反映了不同抗感水稻品种受褐飞虱危害后的高光谱变化规律与不同抗感品种和不同部位的差异,并证实了机器学习技术对水稻抗性级别的分类能力。
杨奇欣, 赖凤香, 何佳春, 魏琪, 王渭霞, 万品俊, 傅强. 不同抗感水稻品种对褐飞虱胁迫的高光谱响应特征[J]. 中国水稻科学, 2024, 38(1): 81-90.
YANG Qixin, LAI Fengxiang, HE Jiachun, WEI Qi, WANG Weixia, WAN Pinjun, FU Qiang. Hyperspectral Properties of Rice Varieties with Varying Resistance Under Brown Planthopper (Nilaparvata lugens) Infestation[J]. Chinese Journal OF Rice Science, 2024, 38(1): 81-90.
抗性级别 Resistance level | 稻苗受害情况 Damage to rice seedlings |
---|---|
1(高抗,HR) | 第1叶轻微受害 The first leaf is slightly damaged |
3(抗,R) | 第1叶明显受害,叶片发黄、叶尖枯死 The first leaf is visibly affected, with yellowing leaf blade and death of the leaf tip |
5(中抗,MR) | 第1、2叶明显受害,叶片发黄、叶尖枯死 The 1st and 2nd leaves are visibly affected, with yellowing leaf blades and withering leaf tips |
7(感,S) | 第1、2、3叶明显受害,叶片发黄、叶尖枯死 The 1st, 2nd and 3rd leaves are visibly affected, with yellowing leaf blades and withering leaf tips |
9(高感,HS) | 稻株整体枯死 The rice plant is withering |
表1 水稻品种对褐飞虱的抗性级别评价方法(SSST法)
Table 1. Standard Seedbox Screening Technique (SSST) method is used to evaluate the resistance level of rice varieties to the brown planthopper.
抗性级别 Resistance level | 稻苗受害情况 Damage to rice seedlings |
---|---|
1(高抗,HR) | 第1叶轻微受害 The first leaf is slightly damaged |
3(抗,R) | 第1叶明显受害,叶片发黄、叶尖枯死 The first leaf is visibly affected, with yellowing leaf blade and death of the leaf tip |
5(中抗,MR) | 第1、2叶明显受害,叶片发黄、叶尖枯死 The 1st and 2nd leaves are visibly affected, with yellowing leaf blades and withering leaf tips |
7(感,S) | 第1、2、3叶明显受害,叶片发黄、叶尖枯死 The 1st, 2nd and 3rd leaves are visibly affected, with yellowing leaf blades and withering leaf tips |
9(高感,HS) | 稻株整体枯死 The rice plant is withering |
品种 Rice variety | 受害水平Damage rating | ||||
---|---|---|---|---|---|
1级 Level 1 | 3级 Level 3 | 5级 Level 5 | 7级 Level 7 | 9级 Level 9 | |
TN1 | 66 | 78 | 66 | 54 | 156 |
Mudgo | 96 | 120 | 192 | 6 | 6 |
RHT | 252 | 126 | 42 | 0 | 0 |
表2 光谱数据组成
Table 2. Composition of hyperspectral data.
品种 Rice variety | 受害水平Damage rating | ||||
---|---|---|---|---|---|
1级 Level 1 | 3级 Level 3 | 5级 Level 5 | 7级 Level 7 | 9级 Level 9 | |
TN1 | 66 | 78 | 66 | 54 | 156 |
Mudgo | 96 | 120 | 192 | 6 | 6 |
RHT | 252 | 126 | 42 | 0 | 0 |
图2 褐飞虱胁迫不同时间3个水稻品种的受害水平(A)及高光谱反射率曲线(B-D) B~D图中虚线表示相关系数,上方蓝色表示具有显著差异的波段(P < 0.05),下方黑色表示显著相关的波段(P < 0.05),高光谱反射率曲线是所有重复的平均值。
Fig. 2. Damage rating (A) and hyperspectral reflectance curve (B-D) of the three rice varieties under the brown planthopper (Nilaparvata lugens) infestation for different days. The dashed lines in diagram B-D indicate correlation coefficients, with blue lines above indicating bands with significant differences (P < 0.05)and black lines below indicating bands with significant correlations(P < 0.05), hyperspectral reflectance curves are averaged over all replicates.
指数名称 Name of the index | 计算公式 Calculation formula | TN1 | Mudgo | RHT | 品种合并 Merge analysis |
---|---|---|---|---|---|
SIPI | (R800−R445)/(R800+R680) | −0.7978 | −0.5510 | −0.4826 | −0.7053 |
SR605/760 | (R605/R760) | 0.7847 | 0.5539 | 0.4829 | 0.6885 |
PSNDb | (R800−R635)/(R800+R635) | −0.7774 | −0.5494 | −0.4731 | −0.6924 |
680 nm(最敏感光波) 680 nm(Most sensitive light wave) | 0.7265 | 0.5217 | 0.4556 | 0.6456 |
表3 水稻品种的植被指数与褐飞虱胁迫天数之间的相关系数
Table 3. Correlation coefficient between the vegetation index of rice varieties and the days of brown planthopper infestation.
指数名称 Name of the index | 计算公式 Calculation formula | TN1 | Mudgo | RHT | 品种合并 Merge analysis |
---|---|---|---|---|---|
SIPI | (R800−R445)/(R800+R680) | −0.7978 | −0.5510 | −0.4826 | −0.7053 |
SR605/760 | (R605/R760) | 0.7847 | 0.5539 | 0.4829 | 0.6885 |
PSNDb | (R800−R635)/(R800+R635) | −0.7774 | −0.5494 | −0.4731 | −0.6924 |
680 nm(最敏感光波) 680 nm(Most sensitive light wave) | 0.7265 | 0.5217 | 0.4556 | 0.6456 |
图3 褐飞虱胁迫下不同抗感水稻品种植株各部位680 nm平均反射率及植被指数SIPI的变化 不同字母表示胁迫天数间差异显著(P < 0.05)。
Fig. 3. Changes of mean reflectance and vegetation index SIPI of rice varieties with various resistance at 680 nm under the brown planthopper (Nilaparvata lugens) infestation. Different letters indicate significant difference among different days of BPH infestation(P < 0.05).
叶位 Leaf position in rice plant | 稻株部位 Rice plant part | TN1 | Mudgo | RHT |
---|---|---|---|---|
第1叶The first leaf | 叶鞘Sheath | 2 | 3 | 11 |
叶片Leaf blade | 2 | 3 | 11 | |
第2叶The 2nd leaf | 叶鞘Sheath | 5 | 8 | 17 |
叶片Leaf blade | 5 | 8 | 17 | |
第3叶The 3rd leaf | 叶鞘Sheath | 11 | >18 | >18 |
叶片Leaf blade | 11 | >18 | >18 |
表4 水稻品种不同部位的植被指数SIPI出现显著变化的最短时间
Table 4. Shortest days when the vegetation index SIPI of different parts of rice varieties shows significant changes. d
叶位 Leaf position in rice plant | 稻株部位 Rice plant part | TN1 | Mudgo | RHT |
---|---|---|---|---|
第1叶The first leaf | 叶鞘Sheath | 2 | 3 | 11 |
叶片Leaf blade | 2 | 3 | 11 | |
第2叶The 2nd leaf | 叶鞘Sheath | 5 | 8 | 17 |
叶片Leaf blade | 5 | 8 | 17 | |
第3叶The 3rd leaf | 叶鞘Sheath | 11 | >18 | >18 |
叶片Leaf blade | 11 | >18 | >18 |
RF模型输入层 RF model input layer | 实测级别(级) Real level(grade) | 预测级别(级) Level of prediction (level) | |||||
---|---|---|---|---|---|---|---|
1 | 3 | 5 | 7 | 9 | 准确率 Accuracy/% | ||
指数SIPI Index SIPI | 1 | 17 | 9 | 1 | 0 | 0 | 63.0 |
3 | 4 | 14 | 2 | 0 | 0 | 70.0 | |
5 | 0 | 3 | 18 | 0 | 0 | 85.7 | |
7 | 0 | 0 | 5 | 0 | 2 | 0.0 | |
9 | 0 | 0 | 2 | 0 | 8 | 80.0 | |
总计Total | 67.1 | ||||||
全波段光谱反射率 Full band spectral reflectance | 1 | 26 | 1 | 0 | 0 | 0 | 96.3 |
3 | 0 | 19 | 1 | 0 | 0 | 95.0 | |
5 | 0 | 2 | 19 | 0 | 0 | 90.1 | |
7 | 0 | 0 | 3 | 0 | 4 | 0.0 | |
9 | 0 | 0 | 1 | 0 | 9 | 90.0 | |
总计Total | 85.9 |
表5 基于指数SIPI和全光谱反射率的RF模型对测试集预测的混淆矩阵
Table 5. Confusion matrix of the test set that was predicted by random forest models with SIPI and full spectral reflectance.
RF模型输入层 RF model input layer | 实测级别(级) Real level(grade) | 预测级别(级) Level of prediction (level) | |||||
---|---|---|---|---|---|---|---|
1 | 3 | 5 | 7 | 9 | 准确率 Accuracy/% | ||
指数SIPI Index SIPI | 1 | 17 | 9 | 1 | 0 | 0 | 63.0 |
3 | 4 | 14 | 2 | 0 | 0 | 70.0 | |
5 | 0 | 3 | 18 | 0 | 0 | 85.7 | |
7 | 0 | 0 | 5 | 0 | 2 | 0.0 | |
9 | 0 | 0 | 2 | 0 | 8 | 80.0 | |
总计Total | 67.1 | ||||||
全波段光谱反射率 Full band spectral reflectance | 1 | 26 | 1 | 0 | 0 | 0 | 96.3 |
3 | 0 | 19 | 1 | 0 | 0 | 95.0 | |
5 | 0 | 2 | 19 | 0 | 0 | 90.1 | |
7 | 0 | 0 | 3 | 0 | 4 | 0.0 | |
9 | 0 | 0 | 1 | 0 | 9 | 90.0 | |
总计Total | 85.9 |
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