西瓜与辣椒间作体系接种AM真菌对连作西瓜植株生长和防御酶活性的影响

Effect of Intercropping System of Pepper-Watermelon Crops Inoculating Arbuscular Mycorrhizal Fungus on Growth and Defence Enzymes Activity of the Continuous Cropping Watermelon

以AM菌剂为试材,研究了西瓜单作体系、西瓜与辣椒间作体系和接种丛枝菌根(arbuscular mycorrhiza,AM)真菌对保护地连作西瓜生长和防御酶活性的影响,以探索克服作物连作障碍的新途径。结果表明:间作、接种AM真菌及间作+接种AM真菌均可提高西瓜植株的株高、地上部鲜重、茎粗、最大单叶面积和单瓜重,西瓜植株根和叶片的超氧化物歧化酶、过氧化物酶、过氧化氢酶活性也明显提高,以间作+接种AM真菌的效果最好;间作和接种AM真菌能促进连作土壤中西瓜的生长,提高防御酶活性,有效缓解连作障碍。

With arbuscular mycorrhizal fungus as materials,the effect of watermelon single cropping,intercropping system of pepper together with watermelon crops inoculating arbuseular mycorrhizal （AM） fungus on plant growth and defence enzymes activity of the continual watermelon in protection field conditions were studied, in order to find a new way to overcome continuous cropping obstacles. The results showed that both intercropping, inoculating AM fungus and intercropping with inoculated AM fungus had positive effect on watermelon crops,which increased the plant height,fresh weight of aboveground part, stem diameter,the biggest leaf area and single watermelon weight. And the SOD activity, POD activity,CAT activity in roots and leaves of watermelon crops obviously rose,while intercropping with inoculated AM fungus had the best effect. So we concluded that the intercropping system of pepper together with watermelon crops and inoculating AM fungus could promote the growth,improve activity of defence enzymes,and then alleviated continuous cropping obstacles of watermelon.