Mpongwana Sanele, Manyevere Alen, Mupangwa Johnfisher, Mpendulo Conference Thando, Mashamaite Chuene Victor
Department of Livestock and Pasture Science, University of Fort Hare, Private Bag X 1314, Alice 5700, South Africa.
Department of Agronomy, University of Fort Hare, Private Bag X 1314, Alice 5700, South Africa.
Heliyon. 2024 Jan 20;10(2):e24817. doi: 10.1016/j.heliyon.2024.e24817. eCollection 2024 Jan 30.
The Sub-Saharan region of southern Africa is characterized by high temperatures, low rainfall, and poor land-use management practices such as continuous cropping without replenishment of soil nutrients. The combination of these factors has resulted in nutrient depletion and land degradation. The current study aimed at investigating the effect of arbuscular mycorrhizal fungi (AMF) and bacteria inoculation on soil chemical properties in field-grown forage legumes, namely, (mucuna) (lablab) and (cowpea), in the semi-arid region of the Eastern Cape Province (South Africa). Forage legumes were inoculated with the AMF species and the bacteria species strain and grown for 120 days. Soil samples were collected in the following sequence: prior to planting, before flowering and after harvesting the forage legumes in each of the two seasons (2017/2018 and 2018/2019) and soil chemical properties were determined using standard procedures. The results showed that the addition of dual inoculation over time greatly improved soil chemical properties when compared to the control treatment. This was advocated by the significant ( ≤ 0.05) increase in soil pH, soil organic carbon, soil organic matter, total nitrogen, phosphorus, calcium, potassium, magnesium, sodium, sulfur and iron in soils. The concentration of cation exchange capacity was significantly ( ≤ 0.05) higher in cowpea treated with as compared to other treatment combinations. The control treatment of mucuna forage greatly improved the concentrations of manganese, boron, copper, molybdenum, and zinc over other treatment combinations only before the flowering stage. However, the concentrations of micronutrients were significantly higher on the treatment combination of lablab and single inoculation of AMF after harvesting. Generally, dual inoculation with AMF and enhanced soil properties when compared to a single inoculation or untreated control.
非洲南部的撒哈拉以南地区气温高、降雨少，且土地利用管理方式不佳，例如连续种植而不补充土壤养分。这些因素共同导致了养分消耗和土地退化。当前的研究旨在调查接种丛枝菌根真菌（AMF）和细菌对东开普省（南非）半干旱地区田间种植的饲用豆科植物（即黎豆、扁豆和豇豆）土壤化学性质的影响。给饲用豆科植物接种AMF物种和细菌物种菌株，并种植120天。按照以下顺序采集土壤样本：在两个季节（2017/2018年和2018/2019年）中，每种饲用豆科植物在种植前、开花前和收获后采集土壤样本，并使用标准程序测定土壤化学性质。结果表明，与对照处理相比，随着时间推移进行双重接种能极大地改善土壤化学性质。土壤pH值、土壤有机碳、土壤有机质、总氮、磷、钙、钾、镁、钠、硫和铁显著（P≤0.05）增加，这证明了上述结论。与其他处理组合相比，接种根瘤菌的豇豆阳离子交换容量浓度显著（P≤0.05）更高。仅在开花期前，黎豆的对照处理相比其他处理组合极大地提高了锰、硼、铜、钼和锌的浓度。然而，收获后，扁豆与单一接种AMF的处理组合中微量元素浓度显著更高。总体而言，与单一接种或未处理的对照相比，双重接种AMF和根瘤菌能增强土壤性质。
