盐胁迫下外源功能微生物调控水稻生长特征研究

以高产水稻品种中浙优1号为材料,设置2个盐胁迫处理(S0,正常生长条件;S1,盐逆境,3g NaCl/kg干土)和2个微生物处理(M0,对照;MM,荧光假单胞菌与巴西固氮螺菌共同接种水稻根际环境),研究了盐胁迫下外源功能微生物对水稻生长特征的影响。结果表明,与S0处理相比,S1处理下水稻植株生育期严重滞后,干物质积累量以及产量构成因子显著降低;与S1M0处理相比,S1MM处理可显著提高水稻剑叶光合速率、地上部干物质量以及产量构成因子。可见,荧光假单胞菌与巴西固氮螺菌进入稻田土壤可缓解盐逆境对水稻生长的抑制作用,提升水稻叶片光合能力、耐盐性能,并显著提高水稻分蘖能力和结实率,增加千粒重,进而增加水稻产量。

Study on Growth Characteristics of Rice Regulated by Exogenous Functional Microorganisms under Salt Stress

The effects of exogenous microorganisms on the growth characters of rice under salt stress(S0,normal growth condition;S1,3g NaCl/kg dry soil;M0,no use of exogenous functional microorganisms;MM,apply exogenous functional microorganisms)were studied in this experiment,using high yield rice variety Zhongzheyou 1 as material.The results showed that,compared with S0 treatment,the growth period of rice under salt stress(S1)was seriously delayed,and the dry matter accumulation and yield composition were significantly reduced.Compared with S1M0 treatment,the photosynthetic rate,aboveground dry matter weight and yield components of S1MM treatment were significantly increased.The above results suggested that involvement of exogenous microorganisms into paddy soil could alleviate the inhibition of salt stress on rice growth,improve the photosynthetic capacity and salt-tolerance of rice leaves,significantly improve the rice seed setting rate,1000-grain weight,rice tillering capacity,and then increase the yield of rice.