FIELD: agriculture.
SUBSTANCE: invention relates to agriculture. Enhancing growth of soyabean comprises treating soyabean seeds and/or soybean plant with an effective amount of at least one chitooligosaccharide represented by formula:
in which R1 is hydrogen or methyl; R2 is hydrogen or methyl; R3 is hydrogen, acetyl or carbamoyl; R4 is hydrogen, acetyl or carbamoyl; R5 is hydrogen, acetyl or carbamoyl; R6 is hydrogen, arabinosyl, fucosyl, acetyl, sulphate, 3-0-S-2-0-MeFuc, 2-0-MeFuc and 4-0-AcFuc; R7 is hydrogen, or mannosyl, glycerol; R8 is hydrogen, methyl or -CH2OH; R9 is hydrogen, fucosyl or arabinosyl; R10 is hydrogen, acetyl or fucosyl; and n is 0, 1, 2 or 3.
EFFECT: invention enables to increase yield of soybean.
63 cl, 8 dwg, 1 tbl, 4 ex
