当前位置: X-MOL 学术Agron. J. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Perennial grass ley rotations with annual crops in tropical Africa: A review
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-02-18 , DOI: 10.1002/agj2.20634
C. S. Wortmann 1 , A. Bilgo 2 , C. K. Kaizzi 3 , F. Liben 4 , M. Garba 5 , N. Maman 6 , I. Serme 7 , Z. P. Stewart 8, 9
Affiliation  

Rotation of grass ley with periods of annual crop production can be a means to increased farming system productivity, sustainability, and profitability. This research review offers interpretations of rotation research results for future African agriculture. Some rotation studies were with naturally generated and severely over-grazed fallows consisting primarily of annual plant species but other studies were with planted and well-managed perennial grass ley. Generally, the rotations increased annual crop yields with soil improvement. System benefits were similar or greater for ley compared with fallow with generally higher fodder yields with ley. Surface crusting of sandy soil in the Sahel is a major concern that may be worsened by fallow due to the deposition of clay and silt particles. Ley and fallow were terminated in all studies with inversion plow tillage with more tillage for subsequent crops while the rotation benefits may be greater with less tillage. Most studies did not have fertilizer use but annual crop yield response to fertilizer was greatly increased following ley in one study and with no system by fertilizer interaction effect in three studies. The profitability of ley rotations will vary with fodder demand which is rapidly increasing, especially near urban areas. Strip cropping, for example, alternate ley with annual crop strips of 5–20 m width and rotation cycles of 6–10 yr, may often be optimal for erosion control and sediment trapping, protection from uncontrolled grazing, and nearby supply of vegetative planting material for ley re-establishment. Rotation management can be improved through experiential learning and experimentation.

中文翻译:

热带非洲多年生草轮与一年生作物:回顾

在一年生作物生产期间轮作草地可以成为提高农业系统生产力、可持续性和盈利能力的一种手段。本研究综述为未来非洲农业提供了轮作研究结果的解释。一些轮作研究涉及主要由一年生植物物种组成的自然产生和严重过度放牧的休耕地,但其他研究涉及种植和管理良好的多年生草本植物。一般来说,随着土壤改良,轮作增加了作物的年产量。与休耕相比,莱的系统效益相似或更大,而莱的饲料产量普遍较高。萨赫勒地区沙质土壤的表面结痂是一个主要问题,由于粘土和淤泥颗粒的沉积,休耕可能会加剧这种情况。在所有研究中,Ley 和 fallow 都终止了反转犁耕,后续作物需要更多的耕作,而更少的耕作可能会带来更大的轮作效益。大多数研究没有使用肥料,但在一项研究中使用 ley 后,作物对肥料的年产量反应大大增加,而在三项研究中没有系统受到肥料相互作用的影响。轮作的盈利能力将随着饲料需求的快速增长而变化,尤其是在城市地区附近。条带种植,例如,与一年生作物条带 5-20 m 宽和 6-10 年轮作周期的交替种植,对于控制侵蚀和沉积物捕获、防止不受控制的放牧和附近的植物种植材料供应可能是最佳的为雷重建。
更新日期:2021-02-18
down
wechat
bug