PURPOSE: A compound fertilizer for plant nutrients with excellent absorption rate into plant is provided to improve biological property and plant growth.CONSTITUTION: A compound fertilizer for plant nutrients with excellent absorption rate into plant uses N-Acetyl thiazolidine carboxylic acid(ATCA). 1-10 wt% of the ATCA is added to composite fertilizer or complex fertilizer. A vield increase culturing method of one of fruit vegetables including tomato, cucumis sativus, eggplant, pumpkin and Capsicum annuum comprises the following step: after 40 days from transplanting fruit vegetables, spraying the ATCA 3-5 times at 20-200 ppm concentration in every 10 days.COPYRIGHT KIPO 2013본 발명은 식물의 생리활성 인자로서 작용하는 N-Acetyl thiazolidine carboxylic acid(이하 ATCA)를 유효성분으로 함유하는 식물영양제용 복합비료 조성물에 관한 것으로 ATCA 1~10중량%를 함유하는 복합비료는 엽장 등 영양생장의 증대효과외에도 과장 등 생식기관의 뛰어난 증대효과가 있다.