一、提高土地的利用率由于砧木的野生性和抗逆性较强，嫁接后蔬菜增强了抗逆性，同块土地同种种植的年份相对延长，提高了土地的利用率。二、防止病害的发生黄瓜、西瓜枯萎病，茄子黄萎病，西红柿根腐病、青枯病、萎蔫病是这4种蔬菜的致命病害。而嫁接就能很好地防止病害的发生 First, to improve the utilization rate of land Because of the strong wild nature and resistance of rootstocks, vegetables after grafting enhanced resistance, with the same land plots of the same planting year relative increase, improve the utilization rate of the land. Second, to prevent the occurrence of disease Cucumber, watermelon Fusarium wilt, eggplant Verticillium wilt, tomato root rot, bacterial wilt, wilt disease is a fatal disease of these four kinds of vegetables. The grafting can well prevent the occurrence of diseases