Relationships between Indexes Related to Vegetation Measured by Ground Sensing and Growth Traits in a Wheat Cultivar ‘Satonosora’.

日本作物学会紀事

article

板谷 恭兵¹  大角 壮弘¹  澤田 寛子¹  水本 晃那¹  福嶌 陽¹ 

[1] 農研機構中日本農業研究センター

关键词: Aboveground biomass;    Growth diagnosis;    Nitrogen content;    Vegetation index;    Wheat;   

DOI  :  10.1626/jcs.91.356

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Relationships of six vegetation indexes to the aboveground biomass and nitrogen content at tillering and stem elongation stages were compared in a wheat cultivar ‘Satonosora’; normalized difference vegetation index (NDVI) measured with the portable crop growth sensor GreenSeeker, NDVI, green NDVI (GNDVI), simple ratio (SR) and chlorophyll index green(CIgreen) measured with a spectroscope, and plant canopy coverage ratio (PCC) calculated from digital images. The aboveground biomass was highly related to PCC, followed by GNDVI and CIgreen. These relationships were stronger than that to NDVI. The values of PCC, GNDVI and CIgreen fitted with nitrogen content better than NDVI especially at the stem elongation stage. Unlike the other indexes, CIgreen was not saturated even during the stem elongation stage, suggesting that it is suitable for estimating the nitrogen content at this stage. While PCC increased consistently throughout the survey period, the other vegetation indexes decreased temporarily under a dry soil condition at an early developmental stage. Therefore, for the indexes obtained with a spectroscope, an improved measurement method that is resistant to environmental fluctuation including soil moisture would better explain biomass and nitrogen content in wheat.

【 授权许可】

CC BY