Abstract：
Monoculture is widely practiced to increase crop productivity, but long-term adaptation has drawbacks as it increases the depletion of soil nutrients and reduces soil quality, especially in dryland areas. Conversion from traditional maize monoculture to intercropping improves sustainable production. However, maize/peanut intercropping, especially rotation of planting strips impacts of maize/peanut intercropping in dryland on carbon (C) budgets and economic benefits remain unclear. In this study, a 5-year field experiment was conducted to evaluate the influence of maize/peanut intercropping with rotation of planting strips on soil health, indirect CO2-eq greenhouse gas emissions, and ecosystem C inputs. Four intercropping treatments viz. maize monoculture, peanut monoculture, maize/peanut intercropping, and maize/peanut rotation-intercropping were tested from 2018 to 2022. Maize/peanut rotation intercropping significantly improved the land equivalent ratio followed by intercropping and monoculture. Rotation-intercropping also improved economic benefits over intercropping and monoculture which were mainly associated with increased peanut yield where the border rows contributed the maximum, followed by the middle rows. Moreover, rotation-intercropping significantly increased the soil organic C and nitrogen (N) content. Rotation-intercropping decreased indirect CO2-eq greenhouse gas emissions and ecosystem C inputs by 3.11% and 18.04%, whereas increased ecosystem C outputs and net ecosystem C budget by 10.38% and 29.14%, respectively, over the average of monoculture. On average for intercropping and monoculture, rotation-intercropping increased ecosystem C emission efficiency for economic benefits by 51.94% and 227.27% in 2021 and 2022, respectively, showing the highest C utilization efficiency than other treatments. In the long run, maize/peanut rotation-intercropping can be practiced in dryland agriculture to achieve sustainable agriculture goals.
摘要：
单一栽培被广泛实践，以提高作物生产力，但是长期适应有缺点，因为它增加了土壤养分的消耗并降低了土壤质量，尤其是在干旱地区。从传统玉米单作到间作的转变提高了可持续生产。然而,玉米/花生间作,特别是种植带的轮作对旱地玉米/花生间作对碳（C）预算和经济效益的影响尚不清楚。在这项研究中,进行了为期5年的田间试验，以评估玉米/花生间作种植带轮作对土壤健康的影响，间接CO2-eq温室气体排放，和生态系统C的投入。四种间作处理，即。玉米单一栽培，花生单一栽培，玉米/花生间作,2018年至2022年对玉米/花生轮作间作进行了测试。玉米/花生轮作间作显著提高了土地当量比，其次是间作和单作。与间作和单作相比，轮作间作和单作也提高了经济效益，这主要与花生产量的增加有关，而边界行贡献最大，其次是中间排。此外，轮作显著提高了土壤有机碳和氮(N)含量。轮作间作使间接CO2-eq温室气体排放和生态系统C投入减少了3.11%和18.04%，而生态系统C产出和净生态系统C预算增加了10.38%和29.14%，分别,超过单一文化的平均水平。平均而言，间作和单作，在2021年和2022年，轮作间作使生态系统C的经济效益排放效率分别提高了51.94%和227.27%，显示出最高的C利用效率比其他处理。从长远来看,旱地农业可以实行玉米/花生轮作间作，以实现可持续农业目标。
