Effects of Different Soybean and Maize Mixed Proportions in a Strip Intercropping System on Silage Fermentation Quality

Soybean (Glycine max Merr.), with a high nutritional value, is an important oil crop and good protein feed crop. Due to the shortage of high-protein import pressure on soybean, scarce main research target for improving quality. High-quality soybean (Qihuang 34) high-yield silage maize (Zea mays L.) (Jingling 386) varieties were used as experimental materials in this study. The quality microbial community mixed analyzed, compatible intercropping ratios maize–soybean evaluated. This experiment designed five strip systems (SIS) randomized block. row 0:1 (pure S), 1:0 maize, M), 1:1 (MS1), 1:3 (MS2), 1:5 (MS3). Dry matter yield fresh improved treatments MS1 MS2. In increase proportion, crude (CP), neutral detergent fiber (NDF), acid (ADF) contents gradually increased, but water-soluble carbohydrates (WSC) dry (DM) reduced different degrees (p < 0.05). Moreover, alone had poor fermentation performance, indicated by pH, acetic (AA), propionic (PA), butyric (BA), ammonia-N (NH3-N) concentrations, low lactic (LA) concentration. By contrast, conducive reducing PA, BA, NH3-N, increasing LA content. relative abundance Lactobacillus Weissella MS higher, undesirable bacteria lower than S. MS2 lowest highest concentration, among three groups. Therefore, SIS modified communities while yields. better ratio was 1:3. These results could provide theoretical basis wide application popularization forage source.