Study on the Growth-Promoting Effect of Lactic Acid Bacteria Compound Preparation on Oat
In order to investigate the growth-promoting effect of lactic acid bacteria compound preparation on the actual production of oat,field tests were carried out simultaneoussly in the dryland area at the north foot of Yin Mountain and in the loess hilly area in 2021.Four treatments including conventional fertilization(A),conventional fertilization+lactic acid bacteria compound preparation(AB),single application of lactic acid bacteria compound preparation(B)and no fertilization(CK)were set up to study the effects of different treatments on the emergence rates,morphological indexes,dry matter accumulation and yields of oat.The results demonstrated that,in the two test sites,the various treatments displayed the same tendency.In comparison to CK,the dry farming area of loess hill experienced a greater rise in the seedling emergence rate,plant height,stem diameter,leaf area,and dry matter accumulation of oat under AB treatment.Similarly,compared with CK,AB treatment significantly increased the spike length,grain weight per spike,grain number per spike,1000-grain weight,biological yield and grain yield of oat in the two test sites,and the effect was the best in the dry farming area of loess Hill.The oat yields in both test sites exhibited noteworthy or highly significant positive correlations with seedling emergence rate,earbearing tiller rate,plant height,stem diameter,leaf area,and dry matter accumulation of aboveground part,furthermore,the yield and characteristics correlation were stronger in the loess hilly dry area,and the characteristics correlation were also significant or extremely significant.
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