摘要
田间试验结果表明:①不同早稻品种的光谱特性,在抽穗前主要受水稻株型(叶片倾斜和披叶程度)的影响;在抽穗期和灌浆期,主要受稻穗(数量及成熟度)的影响。②不同早稻品种的光谱变量与农学参数之间,在抽穗前相关密切,相关系数高,用光谱变量可以估测农学参数;在抽穗后,由于受穗的光谱和天气的影响,它们之间相关较差,如何建立理想的相关模式尚需进一步深入研究。
The results of this paper could be summarized as follows: ① Before rice head emergence, the reflective spectral characteristics of different rice cultivars were mainly affected by rice plant pattern (inclination angle and draping degree). However, in heading and milking stage, the spectral characteristics were principally affected by rice ear (the number of ear and its ripen degree). ② Before heading, it was found that vegetation indexs correlated inversly with agronomic variables, therefore, it was feasible to estimate agronomic variables by VIs. After heading, the relationship of VIs and agronomic variables was complicated because of the influence of rice ear and weather, more study would be needed.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
1993年第S1期32-37,共6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
早稻品种
光谱特性
农学参数
光谱变量
early rice cultivars
reflective spectral characteristics
agronomic variables
vegetation index
