Abstract: In order to determine whether nitrogen-fixing cyanobacteria and growth-promoting bacteria SM13 can increase rice yield and quality,a field plot experiment was conducted,four treatments,namely,conventional control(CK),treatment applied with nitrogen-fixing cyanobacteria(LZ),treatment applied with growth-promoting bacterium SM13(SM),treatment applied with nitrogen-fixing cyanobacteria and growth-promoting bacterium SM13(SL) were designed.The differences of aboveground dry matter weight,leaf area,plant breaking-resistant strength,yield and quality of rice were studied among different treatments.The results showed that the rice leaf area of SM treatment was significantly higher than that of CK at tillering stage,the total leaf area and aboveground dry matter weight of SL treatment was significantly higher than that of CK at full heading stage,the aboveground dry matter weight of LZ and SM treatments were significantly higher than that of CK at filling stage;the lodging index of SL treatment was lower than that of other treatments,which was significantly different from LZ and SM treatments in the second node of rice stalk,and significantly different from SM treatment in the third node of rice stalk,the lodging index of LZ and SM treatments were higher than that of CK,but there was no significant difference;the rice yields of SM,LZ and SL treatments increased by 9.46%,7.39% and 4.94% compared with CK,respectively;the rice integrity and taste scores of LZ,SM and SL treatments were significantly higher than those of CK,the rice aroma score of SL treatment was significantly higher than that of CK,but the chalkiness and chalky grain rate of LZ treatment were significantly higher than those of CK,and the protein content of LZ treatment was significantly lower than that of CK.In summary,in terms of yield,SM treatment was the best;in terms of lodging resistance,SL treatment was the best;in terms of rice quality,SM and SL treatments were better.

Key words: Nitrogen-fixing cyanobacteria, Growth-promoting bacteria SM13, Rice, Yield, Quality

摘要： 为了明确固氮蓝藻和促生细菌SM13在田间是否具有增加水稻产量和提高稻米品质的作用，采用田间试验，设置4个处理，即常规施肥对照处理（CK）、施用固氮蓝藻处理（LZ）、施用促生细菌SM13处理（SM）、施用固氮蓝藻和促生细菌SM13处理（SL），分析不同处理间水稻地上部干质量、叶面积、茎秆抗折力、产量和品质等的差异。结果表明，SM处理分蘖期叶面积显著高于CK。SL处理齐穗期总叶面积和地上部干质量均显著高于CK，LZ、SM处理灌浆期地上部干质量均显著高于CK。SL处理水稻倒伏指数低于其他处理，对于茎秆第二节间，其与LZ、SM处理差异显著，对于第三节间，其与SM处理差异显著；LZ、SM处理水稻倒伏指数高于CK，差异不显著。SM、LZ、SL处理的水稻产量较CK分别显著提高了9.46%、7.39%、4.94%。LZ、SM、SL处理的稻米完整性和味道得分均显著高于CK，SL处理的香气得分显著高于CK，但LZ处理的垩白度、垩白粒率均显著高于CK，蛋白质含量显著低于CK。综上，从产量来看，SM处理最优；从抗倒伏性来看，SL处理最优；从稻米品质来看，SM和SL处理较好。

关键词: 固氮蓝藻, 促生细菌SM13, 水稻, 产量, 品质