摘要
晚稻大田试验结果表明,不同氮肥水平的水稻冠层光谱反射率存在着极显著差异630～690nm,760～900nm和520～600nm等3个波段可作为检测晚稻氮的敏感波段。RVI与LAI,LN,Chl等农学参数之间存在着显著或极显著的相关性。单期RVI与晚稻产量之间存在着显著相关性,但用几个生育期的RVI复合建立的光谱估产模式的精度提高,相关性达到极显著水平。LAI-RVI多元复合估产模式的精度最高,为最佳单产农学光谱估产模式。文中还就单产农学光谱模式的认识及应用问题作了较深入地讨论。
The field results showed: The rice canopy spectral reflectances of various nitrogen levels had significant differences, and the bands of 630-690 nm 760-900 nm, and 520-600 nm could be used as the sensitive bands for the determination of nitrogen contents. It is feasible to estimate the LAI,Chl and the other agronomic parameters by determination of spectral reflectance. The correlation between RV1 and rice yield was significant, and the accuracies of yield estimation models established by two stages of RV1 or LAI-RV1 were satisfied. The comprehensive LA1-RVI estimation model was the best agronomic spectral model.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
1993年第S1期75-79,共5页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
浙江省"八五"科技攻关项目
关键词
晚稻
冠层光谱
农学参数
产量
估产模式
iate rice
canopy spectra
agronomic parameters
yield
yield estimation model
