利用葉綠素測計估測水稻植株葉綠素及氮素

Using Chlorophyll Meter to Estimate Leaf Chlorophyll and Nitrogen Content of Rice Plants

楊純明(Chwen-Ming Yang)

《中華農業研究》 52卷1期 (2003/03) Pp. 73-83

https://doi.org/10.29951/JARC.200303.0008

摘要

Field experiments were conducted at Taiwan Agricultural Research Institute Experimental Farm, Wufeng to investigate changes of leaf total chlorophyll and nitrogen content as well as values of chlorophyll meter for rice plants (Oryza sativa L. cv. TNG 67) grown from the 2(superscript nd) crop of 2000 to the 1st crop of 2002. The relationships between chlorophyll and nitrogen were analyzed, the responses of chlorophyll meter value to their variations were also studied, and the comparison between the first and the second crops were made. Results showed that leaf total chlorophyll and nitrogen content were decreased after transplanting in both cropping seasons, and values of chlorophyll meter followed the trend with these two components. The patterns were similar among different amounts of nitrogen fertilizer treatments. Relationship between leaf total chlorophyll and nitrogen was significant linearly. As no significant d:fference was found between data of two crops with dummy variable test, data were pooled and were shown to also have a linear correlation (R^2=0.615, P＜0.0001) The values of chlorophyll meter and leaf total chlorophyll were linearly correlated with the determination coefficients (R^2) of 0.758及0.862 for the first and the second crops, respectively. Again, data from different crops can be pooled and showed a linear relationship between leaf total chlorophyll and chlorophyll meter readings (R^2=0.784, P＜0.0001). With the above results, leaf nitrogen content and chlorophyll meter readings were analyzed to indicate a significant linear relationship in both cropping seasons. The pooled data from two crops were fitted to a linear regression model (R^2=0.411, P＜0.0001) Results suggest that leaf chlorophyll and nitrogen content can be estimated by chlorophyll meter in rice cultivar TNG 67.

關鍵字

水稻 ； 葉綠素測計 ； 葉綠素總量 ； 氮素含量，氮肥管理

並列摘要

Field experiments were conducted at Taiwan Agricultural Research Institute Experimental Farm, Wufeng to investigate changes of leaf total chlorophyll and nitrogen content as well as values of chlorophyll meter for rice plants (Oryza sativa L. cv. TNG 67) grown from the 2(superscript nd) crop of 2000 to the 1st crop of 2002. The relationships between chlorophyll and nitrogen were analyzed, the responses of chlorophyll meter value to their variations were also studied, and the comparison between the first and the second crops were made. Results showed that leaf total chlorophyll and nitrogen content were decreased after transplanting in both cropping seasons, and values of chlorophyll meter followed the trend with these two components. The patterns were similar among different amounts of nitrogen fertilizer treatments. Relationship between leaf total chlorophyll and nitrogen was significant linearly. As no significant d:fference was found between data of two crops with dummy variable test, data were pooled and were shown to also have a linear correlation (R^2=0.615, P＜0.0001) The values of chlorophyll meter and leaf total chlorophyll were linearly correlated with the determination coefficients (R^2) of 0.758及0.862 for the first and the second crops, respectively. Again, data from different crops can be pooled and showed a linear relationship between leaf total chlorophyll and chlorophyll meter readings (R^2=0.784, P＜0.0001). With the above results, leaf nitrogen content and chlorophyll meter readings were analyzed to indicate a significant linear relationship in both cropping seasons. The pooled data from two crops were fitted to a linear regression model (R^2=0.411, P＜0.0001) Results suggest that leaf chlorophyll and nitrogen content can be estimated by chlorophyll meter in rice cultivar TNG 67.

並列關鍵字

Rice ； Chlorophyll meter ； Total chlorophyll ； Nitrogen content ； Nitrogen fertilizer management