Objective: This study aimed to assess the effects of dietary mulberry leaves on the growth, production performance, gut microbiota, and immunological parameters of poultry and livestock.Methods: The PubMed, Embase, and Scopus databases were systematically analyzed to identify pertinent studies up to December 2022. The effects of mulberry leaf diet was assessed using the weighted mean difference, and the 95% confidence interval was calculated using a random-effects model.Results: In total, 18 studies that sampled 2,335 poultry and livestock were selected for analysis. Mulberry leaves improved the average daily gain and reduced the feed/meat ratio in finishing pigs, and the average daily gain and average daily feed intake in chicken. In production performance, mulberry leaves lowered the half carcass weight, slaughter rate, and loin eye area in pigs, and the slaughter rate in chickens. Regarding meat quality in pigs, mulberry leaves reduced the cooked meat percentage, shear force, crude protein, and crude ash, and increased the 24 h pH and water content. In chickens, it increased the drip loss, shear force, 45 min and 24 h pH, crude protein, and crude ash. Mulberry leaves also affect the abundances of gut microbiota, including Bacteroides, Prevotella, Megamonas, Escherichia-Shigella, Butyricicoccus, unclassified Ruminococcaceae, Bifidobacterium, Lactobacillus, and Escherichia coli in poultry and livestock. Mulberry leaves at different doses were associated with changes in antioxidant capacity in chickens, and immune organ indexes in pigs. With respect to egg quality, mulberry leaves at different doses improved the shell strength, yolk color, eggshell thickness, and eggshell weight. However, moderate doses diminished the egg yolk ratio and the egg yolk moisture content.Conclusion: In general, dietary mulberry leaves improved the growth, production performance, and immunological parameters in poultry and livestock, although the effects varied at different doses.

The effects of plant essential oil (PEO) on the production performance and immune function of laying hens were evaluated to provide theoretical basis for promoting the natural plant extracts. Eight thousand 1-day-old healthy laying hens were randomly divided into a control group or PEO group, with four replicates per treatment and 1000 hens per replicate. The PEO diet was supplemented with 3g/kg plant extract. Diets were fed for 56 days. The tibia length and keel length were detected on an empty stomach at the end of the trial. Blood samples were collected on the 28th and 56th days to detect the level of C3, C4, IL-1, IL-2, IL-17 and immunoglobulin in the serum. The results showed that, compared with the control, PEO supplementation significantly increased the weight gain rate (WGR) at the 2nd, 4th, 5th and 7th week (p<0.05), and decreased the WGR at the 3rd and 6th week. The tibial length was significantly increased at the 3rd, 5th, 6th and 7th week (p<0.01), and also the keel length at the 5th and 7th week in PEO group. The concentration of IgG and IgM also significantly influenced with PEO supplementation, but there was no significant difference in the complements, C3 and C4, and the IL levels between days 28 and 56. Moreover, no significant difference was observed in body weight and immune organ on day 56. Therefore, we conclude that the addition of PEO could improve the production performance and immune function in laying hens.

Mulberry (Morus spp.) is resilient to water deficit conditions, and the high protein content of its leaves means they can be used as forage. Therefore, it could be a valuable resource for alleviating the animal feed crisis, but it is crucial that its high productivity and stable traits are sustained to achieve this. We conducted a 2-year field experiment in the North China Plain (NCP), which investigated different irrigation levels (W1 = 15 mm, W2 = 30 mm) and genotypes (Feng Yuan No. 1, Feng Chi). This study demonstrates that using water-saving irrigation coupled with selected genotypes can increase the leaf yield and protein content. We measured various physiological and ecological indicators of mulberry, including the leaf area, fresh leaf weight, dry leaf weight, net photosynthetic rate, leaf water use efficiency (WUE_L) under limited irrigation, protein content, and yield. The results from both years indicate that, under deficit irrigation conditions, Feng Yuan No. 1 exhibited drought resistance while maintaining relatively high and stable growth traits. When the irrigation amount was increased (W2 = 30 mm), the net photosynthetic rate and leaf water use efficiency of Feng Yuan No. 1 were significantly better than those of Feng Chi. Additionally, Feng Yuan No. 1 combined with the W2 irrigation treatment led to a higher protein content of leaves (19.98 g/100 g and 21.19 g/100 g) and greater yield of leaves and branches (9.79 t·ha⁻¹ and 11.19 t·ha⁻¹) in the two years. Furthermore, under deficit irrigation conditions, Feng Yuan No. 1 effectively compensated for yield losses caused by water scarcity.

The rapid expansion of the meat duck industry in China has intensified environmental challenges, particularly those related to managing high-moisture duck manure. Fermentation bed systems, utilizing rice husks as a primary substrate, offer a sustainable solution by promoting waste decomposition and improving animal welfare. This study investigated microbial diversity in rice husk-based fermentation bed materials across different usage durations to assess their ecological feasibility. Samples were collected from a duck farm in Linyi, China, after one, three, five and seven batches of duck rearing (21 days per batch). Microbial communities were analyzed using polymerase chain reaction–denaturing gradient gel electrophoresis (PCR-DGGE), followed by cluster analysis, principal component analysis (PCA) and sequencing of recovered DGGE bands. The results revealed significant shifts in microbial composition, with low similarity (18% overall) and distinct abundance patterns among groups. Bacteroidetes abundance increased with prolonged usage, while Staphylococcus aureus was only detected in the first batch. A total of 32 sequenced bands identified dominant phyla, including Actinobacteria, Proteobacteria, Firmicutes and Bacteroidetes. Group 4 (seven batches) exhibited the highest microbial diversity and richness (Shannon index: 2.68; mean abundance: 16.33 bands), which was attributed to organic matter accumulation and nutrient release during fermentation. These findings demonstrate that rice husk-based fermentation beds maintain robust microbial diversity over time, effectively supporting waste degradation and duck health. We conclude that rice husks are a viable, eco-friendly substrate for waterfowl fermentation bed systems, with periodic microbial supplementation recommended to enhance long-term efficacy. This work provides critical insights for optimizing sustainable livestock farming practices.

This study aimed to establish an integrated variety–technology cultivation pathway for the new forage mulberry variety ‘Fengyuan No. 1’, linking salt tolerance mechanisms with practical application. A systematic investigation was conducted via a pot experiment with a 0–5‰ NaCl gradient and a field trial comparing three cultivation modes: Ridge Planting (RP), Furrow Planting (FP), and Flat-Bed Planting (FBP). Key findings are as follows. (1) The salt tolerance threshold was clearly defined: a 100% survival rate at salinity ≤ 4‰ (with no injury symptoms at ≤3‰), and 5‰ identified as the lethal threshold (33.33% survival). Salt stress triggered a resource reallocation strategy, increasing the leaf-to-stem fresh weight ratio from 1.53 (0‰) to 2.78 (5‰) to prioritize leaf photosynthetic function. Stable leaf circularity (0.83–0.87) indicated morphological stress resistance. (2) Optimized cultivation pathways were identified: FBP was the core pathway for maximizing biomass accumulation (root, stem, and leaf fresh weights were 5.0, 2.3, and 1.5 times those of RP, respectively) and resulted in the lowest leaf Na⁺ accumulation (124 mg/kg), making it suitable for lightly to moderately saline–alkali land (≤4‰). FP served as an effective pathway for salt avoidance and height promotion (plant height: 113.18 cm). RP constituted a specialized pathway for high-quality forage, yielding the highest crude protein content (23.3 g/100 g). (3) Cultivation modes significantly affected functional components; FBP activated alkaloid DNJ synthesis (215.16 mg/kg), whereas RP and FP increased osmolyte GABA accumulation (~586 mg/kg). In conclusion, this study integrates a complete technical pathway from salt tolerance mechanism analysis to diversified cultivation options, providing a systematic variety–technology solution for the industrial development of forage mulberry on coastal saline–alkali land.

The shortage of high-quality forage and the need for alternative protein sources are critical challenges for livestock production in northern China, where cold winters and saline–alkaline soils limit crop options. Mulberry (Morusalba L.) is a promising high-protein forage, yet few varieties have been bred for these conditions. Here, we report the breeding of ‘Fengyuan No. 1’, developed through systematic evaluation of 31 mulberry accessions for five forage traits, followed by a 4 × 3 factorial crossing design using four female parents (‘8036’, ‘Dahongpao’, ‘Jinqiang 63’, ‘Hongguo 2’) and three male parents (‘Nongsang 14’, ‘Yu 2’, ‘Yiyuan Huanglu’) selected based on comprehensive evaluation and complementary agronomic traits. Among the nine hybrid families with sufficient seed, family X01 (‘8036’ × ‘Nongsang 14’) ranked first in a three-year (2011–2013) comprehensive evaluation of growth traits using membership function analysis and was subsequently named ‘Fengyuan No. 1’. Multi-location (Shandong, Anhui, Shaanxi) field trials (2018–2021) with ‘Fengchi’ as the control showed that ‘Fengyuan No. 1’ achieved an average annual leaf yield of 12,596.48 kg DM·ha⁻¹ (+14.20%) and total branch–leaf biomass of 25,341.95 kg DM·ha⁻¹ (+13.36%). Leaf crude protein reached 30.87% on a dry matter basis (+25.64% vs. control). Silage prepared from this variety exhibited excellent fermentation quality (pH 4.10) and a relative feed value of 272.46, exceeding alfalfa silage standards. The variety maintained 100% survival at 0.4% NaCl and a 13.74% biomass advantage over the control on saline–alkaline field soils, with winter-desiccated shoot tips reduced by 53%. These results establish ‘Fengyuan No. 1’ as an elite forage mulberry for the Yellow River Basin and similar ecoregions.