增施有机肥和微生物菌肥对大豆农艺性状及产量的影响OACSTPCD

[Objective]In order to investigate the effects of increased application of organic fertilizer and microbial fertilizer on soybean growth and development in Hulun Buir City,Inner Mongolia and the economic benefits,and provided a reference for soybean water and fertilizer management in this area.[Methods]The experiment will be carried out in the Morin Dawa Daur Autonomous Banner of Hulun Buir City from 2022 to 2023.Mengdou No.48 was used as the test material,and three fertilization treatments were set up,conventional fertilization(CK),increased application organic fertilizer(OF),and increased application of microbial fertilizer(MF),respectively.The experiment analyzed soybean growth traits,leaf SPAD value,dry matter accumulation and yield factor indexes,and calculated economic benefits,and calculated synergism and efficiency increase.[Results]The plant height,number of main stem nodes and effective branching number of soybean treated with OM were significantly higher than those treated with CK(P<0.05),and the bottom pod height of soybean treated with OM and MF was significantly lower than that treated with CK(P<0.05).The changes of dry matter accumulation and leaf SPAD value of soybean increased gradually with the progression of growth stage,and the performance was OM>MF>CK.Dry matter accumulation at podding stage,drumming stage and maturity stage was significantly higher under OM treatment than CK(P<0.05).The leaf SPAD value of OM treatment was significantly higher than CK at flowering stage,podding stage and druming stage(P<0.05).In the past two years,the number of pod per plant,grain weight per plant,100-grain weight and effective plant number of soybean in OM and MF treatment were significantly higher than those in CK(P<0.05),and there was no significant difference between OM and MF treatment(P>0.05).Soybean yield has a extremely significant positive correlation with number of pod per plant,number of seeds per plant,grain weight per plant and effective plant number(P<0.01).Soybean yield was significantly positively correlated with whole growth period,plant height,number of main stem nodes,dry matter accumulation,leaf SPAD value and 100-grain weight(P<0.05).Soybean yield was significantly negatively correlated with bottom pod height(P<0.05).In the past two years,the soybean yield under OM treatment increased by 625.70 kg/hm2 and 599.60 kg/hm2 compared with CK,and the benefit increased by 21.20%and 19.30%,respectively.In addition,MF treatment increased production by 375.80 kg/hm2 and 237.10 kg/hm2 compared with CK,and the benefit increased by 10.40%and 3.80%,respectively.[Conclusion]In Hulun Buir City,Inner Mongolia,the best fertilizer mode for increasing soybean yield and efficiency was to apply organic fertilizer on the basis of conventional fertilizer.