近日，安徽省农业科学院作物研究所大豆栽培团队在中科院1区TOP期刊《 Energy》（IF=9.0）上发表了题为“ Effect of soybean inclusion in cropping systems on productivity, profitability, and carbon footprints: A case study from the Huang-Huai-Hai Plain”的最新研究成果。 这项研究探究了大豆单作或大豆玉米带状复合种植对地区周年粮食生产可持续性的影响。
黄淮海平原集约化的冬小麦-夏玉米（W-M）周年两熟模式面临严峻生态挑战。种植大豆是一种用养结合、生态友好的可持续种植模式，但其对周年系统生产力、能量盈余和碳排放等方面的影响尚不明确。本研究比较了三种种植模式：冬小麦-大豆（W-S）、冬小麦-夏玉米//夏大豆（W-M/S）、以及传统的W-M对周年系统产量、能源平衡、碳足迹（CF）、经济效益和农业可持续性的影响。结果表明，与W-M相比，W-S和W-M/S中大豆的前茬效应分别使后茬小麦产量提高了8.8%和3.6%；W-M/S使周年籽粒产量、当量产量和能量产量分别提高了3.6%、17.5%和6.7%，相应的W-S分别降低了28.6%、5.3%和25.2%；由于农资投入较少，W-S使碳足迹降低了19.8%-42.8%；在产量和土壤有机碳储量增加的情况下，W-M/S使净能量、净回报和净碳收益分别增加了5.1%、9.4%和4.3%，同时碳足迹降低了19.3%-31.3%，最终可持续性指数上升了43.2%。综上，种植大豆（无论是间作还是轮作）都可以保持土壤有机碳并降低碳足迹。
Graphical abstract
Fig. 2.Grain yield (a, b, and c), maize equivalent yield (d, e, and f), and energy yield (g, h, and i) for three cropping systems from 2021 to 2023.
Fig. 3.Energy inputs from fertilizers, seeds, labor, herbicides, diesel fuel, irrigation, insecticides, machinery, fungicides, and electricity for three cropping systems (a) and their proportions (b).
Fig. 4.Energy use efficiency (a, b, and c), energy productivity(d, e, and f), and net energy(g, h, and i) for three cropping systems from 2021 to 2023.
Fig. 5.Economic inputs from fertilizers, seeds, labor, herbicides, diesel fuel, insecticides, machinery, fungicides, and electricity for three cropping systems (a) and their proportions (b), alongside economic output (c), net return (d), and benefit-cost ratio (e).
Fig. 8. Carbon footprint (CF) per unit of area(a), per kg of grain yield (b), per GJ of energy yield (c), and per kg of maize equivalent yield(d) for three cropping systems.
文章链接：返回搜狐，查看更多