Studies on the Effect of Minor Elements in the Chlorophyll Formation in Green Asparagus
J. W. Chen
The studies were on effect of minor elements application and different row direction in the chlorophyll formation in green asparagus.
Results indicated that: (1) There was no significant efficiency for chlorophyll formation with minor elements application. (Soil pH value 6.2~6.5). (2) It was obvious that row direction was considered significantly in determining the chlorophyll formation, the chlorophyll content of spears harvested from the rows for north-south direction were higher than those from the rows of west-east direction. (3) The chlorophyll content of spears harvested was higher in November (temperature 25~30℃) and April (temperature 20~28℃) than that of spears harvested in June (temperature above 30℃). Particularly, it was highest in November. The reason is due to the spears growing very rapidly during the high temperature (above 30℃), in this case the chlorophyll content would be low, and the period of spears harvested in November (temperature 25~30℃) were suitable for the chlorophyll formation so that the chlorophyll content would become high.