摘要
棉花群体结构与棉田光量子的透射、反射和吸收等传递特性有密切关系 ,其中透射率与叶面积指数和群体叶片重关系最密切 ,可用于估测叶面积指数和群体叶重的大小 .光的透射率与群体地上部分生物量和茎枝生物量也有很好的关系 ,可用于活体农作物生物量间接测定 .反射率与叶面积和生物量也有一定关系 。
There were close relationships between cotton population composition and transmittance, reflectance and absorptance of photosynthetic active radiation (PAR). There were highest correlated coefficient between the transmittance of PAR and the leaf area index (LAI) or leaf weight, so the transmittance of PAR could be used to estimate leaf weight of cotton population and LAI. There were also close relationship between penetration of PAR and the total weight above ground and other organs weight, so the observed penetration in cotton population was a good method for estimating the biomass. The reflectance of PAR related to LAI or biomass closely in some ranges of LAI, which can use to estimate the crop biomass by remote sense.
出处
《作物学报》
CAS
CSCD
北大核心
2000年第3期333-340,共8页
Acta Agronomica Sinica
基金
国家自然科学基金资助项目,编号39170474
关键词
群体结构
光合有效辐射
透射率
反射率
叶面积指数
生物量
Population composition
Photosynthetic active radiation
Transmittance
Reflectance
LAI
Biomass
