Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China.
School of Public Affairs, Zhejiang University, Hangzhou, PR China.
J Sci Food Agric. 2023 Oct;103(13):6680-6688. doi: 10.1002/jsfa.12763. Epub 2023 Jun 23.
Pears, as an important cash crop, are currently facing great issues due to unsustainable management practices. Cover cropping is a sustainable management strategy that can improve soil fertility and increase fruit yield, while it may also stimulate greenhouse gas emissions. Therefore, synergizing multiple indicators to achieve sustainable development is critical. This study introduces a new management system, namely the planting and mowing of ryegrass as a livestock feed system (PRSS), and analyzes its impact on soil quality, economic benefits, and environmental burdens.
Our results indicated that PRSS could increase soil pH from 5.08 to 5.48 and decrease the content of soil alkali-hydrolyzable nitrogen, total phosphate, and available phosphate (26.96-59.89%) while also enhancing yield (+38.51%) compared with the traditional natural grass management system (TMS). The average soil methane fluxes in PRSS were 72.67 μg m day , higher than those of TMS (61.28 μg m day ). However, the gross primary production was lower than TMS (-37.24%), and no significant difference was observed in soil nitrous oxide fluxes. In different scenarios, the total profit of PRSS mode 1 (mowing ryegrass and selling to a livestock company) and PRSS mode 2 (mowing ryegrass and feeding own sheep) were 10 706.21 $ ha and 26 592.87 $ ha respectively. These values are respectively2.36 times and 5.85 times higher than that of TMS. The total global warming potential of TMS (18.19 t CO -eq ha ) was 1.29 t CO -eq ha higher and 2.89 t CO -eq ha lower than that of PRSS mode 1 and mode 2 respectively.
Compared with traditional natural grass, planting and mowing ryegrass in pear orchards can optimize soil properties, increase fruit yield, and reduce global warming potential. Different modes can greatly increase revenue but have varying impacts on environmental burdens. These findings can help rebuild the links between farmland and specialized livestock production, contributing to sustainable development in the pear industries. © 2023 Society of Chemical Industry.
梨作为一种重要的经济作物，目前由于管理方式不可持续而面临诸多问题。间作覆盖作物是一种可持续的管理策略，可提高土壤肥力和增加果实产量，但也可能刺激温室气体排放。因此，综合多个指标以实现可持续发展至关重要。本研究引入了一种新的管理系统，即种植和刈割黑麦作为牲畜饲料系统（PRSS），并分析了其对土壤质量、经济效益和环境负担的影响。
我们的结果表明，与传统的天然草地管理系统（TMS）相比，PRSS 可以将土壤 pH 值从 5.08 提高到 5.48，并降低土壤碱解氮、总磷酸盐和有效磷的含量（26.96-59.89%），同时还可以提高产量（+38.51%）。PRSS 中的平均土壤甲烷通量为 72.67μg/m 天，高于 TMS（61.28μg/m 天）。然而，总初级生产力低于 TMS（-37.24%），土壤氧化亚氮通量没有显著差异。在不同的情景下，PRSS 模式 1（刈割黑麦并出售给牲畜公司）和 PRSS 模式 2（刈割黑麦并喂养自家绵羊）的总利润分别为 10706.21 美元/公顷和 26592.87 美元/公顷，分别是 TMS 的 2.36 倍和 5.85 倍。TMS（18.19t CO -eq ha ）的总全球变暖潜势比 PRSS 模式 1 和模式 2分别高 1.29t CO -eq ha 和低 2.89t CO -eq ha。
与传统的天然草地相比，在梨园种植和刈割黑麦可以优化土壤性质、增加果实产量和降低全球变暖潜势。不同的模式可以大大增加收入，但对环境负担的影响不同。这些发现有助于重建农田和专门牲畜生产之间的联系，为梨产业的可持续发展做出贡献。© 2023 化学学会。
