Adet Agricultural Research Center, Bahir dar, Ethiopia.
Amhara Agricultural Research Institute, Bahir dar, Ethiopia.
PLoS One. 2024 Jul 31;19(7):e0306625. doi: 10.1371/journal.pone.0306625. eCollection 2024.
Integrated nutrient management and crop rotation are important farming practices, which enhance the nutrient use efficiency of crops and reduce the incidence of diseases and insect pests. The study was carried out to address the gap in using integrated nutrient management in crop rotation systems for soil qualities and crop yield improvement. That was done by adjusting the balance ratio of dry bio-slurry and nitrogen fertilizers. The experiment was containing ten levels; Control (0,0), recommended nitrogen, 50% dry-bio slurry, 100% dry-bio slurry, 75% dry-bio slurry, 75% dry-bio slurry+25% recommended nitrogen, 50% dry-bio slurry+50% recommended nitrogen, 25% dry-bio slurry+75% recommended nitrogen, 100% dry-bio slurry + 25% recommended nitrogen and 100% dry-bio slurry + 50% recommended nitrogen that was laid out in randomized complete block design with three replications for three years. The data on soil properties and yield components of potatoes and wheat were collected and analyzed using statistical analysis system software 9.4. An application of dry bio-slurry with nitrogen fertilizer was significantly affected both crop yield and soil properties in the rotation system. The application of 25% dry bio-slurry with 75% recommended nitrogen gave the highest tuber yield of potato (27.6 tha-1) as compared to control. Similarly, using 100% and 75% sole dry bio-slurry resulted in the highest grain yield (3.85 tha-1) and above-ground biomass (9.59 tha-1) of wheat. The combination of 25% dry bio-slurry with 75% recommended nitrogen scored the highest net benefit (2889.2 US$) with an acceptable marginal return (4463.3%) via by improving crops yield in the system. So, an application of 25% dry bio-slurry with 75% recommended nitrogen could be promoted for yield-soil improvement in the study area and similar agroecology.
综合养分管理和轮作是重要的农业实践，可提高作物养分利用效率，降低病虫害发生。本研究旨在解决轮作系统中综合养分管理在改善土壤质量和作物产量方面的应用差距。通过调整干生物泥浆和氮肥的平衡比例来实现。试验包含 10 个水平；对照（0，0）、推荐氮、50%干生物泥浆、100%干生物泥浆、75%干生物泥浆、75%干生物泥浆+25%推荐氮、50%干生物泥浆+50%推荐氮、25%干生物泥浆+75%推荐氮、100%干生物泥浆+25%推荐氮和 100%干生物泥浆+50%推荐氮，采用随机完全区组设计，三年重复三次。收集和分析了马铃薯和小麦的土壤特性和产量构成数据，并使用统计分析系统软件 9.4 进行了分析。氮与干生物泥浆的联合应用显著影响轮作系统中的作物产量和土壤特性。与对照相比，25%干生物泥浆与 75%推荐氮的应用使马铃薯的块茎产量最高（27.6 吨/公顷）。同样，单独使用 100%和 75%干生物泥浆导致小麦的籽粒产量（3.85 吨/公顷）和地上生物量（9.59 吨/公顷）最高。25%干生物泥浆与 75%推荐氮的组合通过提高系统中的作物产量获得了最高的净效益（2889.2 美元）和可接受的边际回报（4463.3%）。因此，在研究区和类似农业生态区，可推广应用 25%干生物泥浆与 75%推荐氮来提高产量和土壤质量。
