太阳能消毒与植物根际促生菌(PGPR)联合对黄瓜根腐病的防治效果

为明确太阳能土壤消毒与植物根际促生菌(PGPR)联合对黄瓜根腐病防治效果, 在对温室进行太阳能土壤消毒之后, 采用蘸根和灌根的方式测定了解磷?抑菌效果较好的3个菌株JPG-5?LWG-5和YB-4对黄瓜根腐病的田间防治效果及其对黄瓜根围养分的影响?结果表明:1)YB-4 300倍蘸根对黄瓜根腐病防治效果最高, 病指防效为89.49%, 显著高于LWG-5 300倍和JPG-5 500倍的防治效果?2)LWG-5 500倍灌根对黄瓜根腐病防治效果最高, 为89.47%, 显著高于LWG-5 800倍和JPG-5 500倍防治效果?3)不管是灌根还是蘸根, JPG-5 500倍和YB-4 300倍均能显著提高黄瓜根围有效磷含量, 分别为99.68?86.81 mg/kg和84.30?86.56 mg/kg?因此, PGPR菌株在田间促进养分转化效果和对根腐病的防治效果综合评判, 用YB-4 300倍蘸根?JPG-5 500倍灌根和LWG-5 500倍灌根效果较好?

Control effect of soil solarization combined with plant growth promoting rhizobacteria (PGPR)on cucumber root rot

To clear the effect of soil solarization combined with plant growth promoting rhizobacteria(PGPR)on cucumber root rot, field control efficacy and the influence on available nutrients in cucumber rhizosphere soil of three strains JPG-5, LWG-5 and YB-4, which could both antagonize Fusarium solani f.sp. cucurbitae and dissolve insoluble phosphorus, were determined by cucumber root dipping and root drenching after soil solarization in the greenhouse. The results showed that the control efficacy of YB-4 300 times solution was 89.49%, significantly higher than that of LWG-5 300 times solution and JPG-5 500 times solution by root dipping. LWG-5 500 times solution by root drenching had the highest control effect, with the efficacy of 89.47%, significantly higher than that of LWG-5 800 times solution and JPG-5 500 times solution by root drenching. The content of available phosphorus in cucumber rhizosphere all increased significantly with JPG-5 500 times solution and YB-4 300 times solution by root dipping or root drenching, which were 99.68 and 86.81 mg/kg or 84.30 and 86.56 mg/kg, respectively. Therefore, based on the effect of PGPR strain on promoting nutrient transformation and controlling root rot in the field, it could be concluded that YB-4 300 times solution by root dipping, JPG-5 500 times solution by root drenching and LWG-5 500 times solution by root drenching had better effect.