盐碱土壤对全株大豆青贮品质及异黄酮含量的影响OA

The experiment aimed to investigate the effects of saline-alkali soil environment and silage fermentation time on the silage quality and isoflavone content of whole soybean plants at the grain filling stage.Whole soybean plants(Fendou 189)at the grain filling stage grown in saline-alkali land(MT)and non-saline-alkali land(NG)were used as raw materials for silage preparation.Fermentation treatments of 30 days and 60 days were set,with non-ensiled samples as the control,and the nutritional quality,fermentation quality and other indicators were determined.The results showed that compared with the group NG,the dry matter(DM)content in the groups NG30 and NG60 was significantly decreased(P<0.05).The content of neutral detergent fiber(NDF)in the groups NG60 and MT60 was significantly lower than that of the groups NG and MT(P<0.05),while the water-soluble carbohydrate(WSC)content was significantly higher than that of the groups NG and MT(P<0.05).The content of NDF in the group NG60 was significantly higher than that of the group MT60(P<0.05).The crude protein(CP)content of the group NG30 was significantly higher than that of the group MT30(P<0.05).The concentrations of daidzin,genistin,malonyldaidzin and malonylgenistin in the groups NG60 and MT60 were significantly higher than those in the groups NG and MT,respectively(P<0.05).The concentrations of malonylglycitin,daidzein,glycitein and genistein in the groups NG30 and MT30 were significantly higher than those in the groups NG and MT,respectively(P<0.05).In terms of feeding value,the relative feeding value(RFV)of the group NG was significantly lower than those of the groups MT and MT30(P<0.05).The study shows that the palatability of whole soybean plants from saline-alkali land is improved after ensiling,and the saline-alkali environment has a relatively minor effect on isoflavone content of ensiled soybeans,which can provide a reference for the forage development of soybeans and the utilization of saline-alkali land resources.