Effect Of Reducing Chemical Fertilizer Insteaed Of Compound Biofertilizer Of Pgpr On Peas And Maize

On the comparison of imported bioferitilizer with the one, which is attained from further filtration on multi-functional strains, and their effects on the growth of peas and Maize is measured on the basis of the reduction of 20-30% of fertilizer in the study. The results obtained are as follows:1. The PGPR strain was selected by composite filtration again, the excellent strain are: LM4-3, LH12-3, Lx191, Jm92 and LHS11.2. Strain Lx191 and LHS11 are both possessed of positive antagonism on the tested plant pathogens. And LHS11 makes the best impact on fusarium oxysporum f . niveum and fusarium oxysporium f. sp. Cucumerinum ( The inhibition ratio to it is 84% ). Strain Lx191 also produces 74% of inhibition ratio to fusarium oxysporium f. sp. Cucumerinum. Strain Lx191 and LHS11 have a nearly equivalent inhibition ratio to cotton rhizoctonia solani ( It's between 64% and 65% ).3. The analysis of antagonism on 5 of the selected strains is a result that they have no effect of inhibition each other, so they could be mix-cultured and compound bioferitilizer is utilized with one pea-rhizobium.4. It is showed in field experiment that it (Treatment C) is the first-grade combination with 20% of reduction in fertilizer and the displacement of bioferitilizer A, the second (Treatment A) is the one with 20% of reduction in fertilizer and the displacement of bioferitilizer A, and the third (Treatment B) is the one with 30% of reduction in fertilizer and the displacement of bioferitilizer B. Compared with the others, Treatment A has no significant difference, while it increases the plant traits and yield. The effect of Treatment B is less than Treatment A, and less than Treatment A in some indicators (hundred seed weight of monoculture Maize, and seed yield of pea and Maize, for instance).5. The outcome of this research is beneficial for the reduction of resource-purchasing without dropping in production per hectare: 200 ~ 340 RMB for peas, single 570 ~ 870 RMB for Maize, and 395~ 605 RMB for peas and Maize.