Green degree holding method of perennial plants dormant fading in winter, green degree of retention agents, as well as Midori-do recovery method for promoting

摘要

PROBLEM TO BE SOLVED: To provide a method for maintaining the plant greenness for maintaining a lawn in a golf course, etc., capable of extending a period of maintaining the plant greenness in the winter season, also promoting the recovery of the greenness in the early spring and maintaining the plant greenness without polluting the environment by increasing the concentration of a betaine in the plant body. ;SOLUTION: This method for maintaining a plant greenness is to spray a plant greenness maintaining agent containing a betaine of the formula (R is a 1-8C alkyl) such as a glycine betaine as an active ingredient (an applying concentration is preferably 1-10g/m²) to the plant belonging to the family Graminease, etc., for increasing the betaine concentraion in the plant body to maintain the greenness of the plant. Further, a plant greenness recovery promoter is obtained by containing the betaine and an iron component as active ingredients.;COPYRIGHT: (C)1998,JPO