Optimizing Soil Fertility Management Strategies to Enhance Banana Production in Volcanic Soils of the Northern Highlands, Tanzania

Abstract

Banana is an important crop in high altitude areas of Tanzania, grown widely both as a food staple and as the main source of income. However, its production is constrained by low soil fertility, a result of gradual nutrient mining by the crop. Currently, soil fertility management in banana-based farming systems in the country relies mainly on applications of animal manure. However, the amount of manure produced in most farms is not enough to replenish soil fertility due to the small number of animals kept by smallholder resource-poor farmers who are the major producers in the country. Field experiments were conducted at three sites with varying soil types and contrasting weather conditions along the altitudinal gradients on the slopes of the volcanic mountains of Kilimanjaro and Meru, northern Tanzania to (1) investigate the effect of mineral nitrogen (mineral N) fertilizer applications on the growth and yield of Mchare banana (Musa spp., AA, a traditional East African highland cooking banana sub-group), at the four levels of 0, 77, 153, and 230 kg N ha −1 year −1 as a starter strategy to improve the current soil fertility management strategies, and (2) evaluate the effect of the combined use of inorganic and organic N sources on growth and banana fruit production as an alternative strategy to manage soil fertility and minimize animal manure requirements. The treatment factors were trial sites (Tarakea, Lyamungo, and Tengeru) as the main factor and N fertilization strategies (as urea alone, sole cattle manure, and in combination with urea, sole common bean (Phaseolus vulgaris L.) haulms as well as in combination with urea) as a sub factor. Bean haulms and cattle manure were applied each year for two years. Fertilization at 153 kg N ha −1 year −1 derived solely from urea significantly (p < 0.001) resulted in high yield increment of up to 42% relative to the control. However, the increase was highest (52%) with the same N dose derived from cattle manure in combination with urea at 50% substitution. Sole bean haulms resulted in a smaller yield increment, the same as the lowest N dose from the sole urea fertilization treatment. The study concludes that soil fertility management in smallholder banana-based farming systems should not solely rely on animal manure and mineral fertilizers.

Improving Mineral Status, Productivity and Fruit Quality of Guava Trees (Presidium guajava L.) Using some Organic Manure Extracts as a Foliar Application

“…At is well known that organic manure fermentation and decomposition produced and liberties some growth regulators and nutritional elements, such as IAA, cytokines, N, K, B and Zn. In addition organic manure decomposition producing some chelating compounds that can save the elements from loss (Mengel, 1985;Marschner, 1995;Mengel, 2007;Ibrahim et al, 2015;Meya et al, 2020). The aforementioned roles of organic manure tea could be explanted its effect on improve fruit physical and chemical properties that clearly showed in the present study.…”

Impact and Opportunities of Agroecological Intensification Strategies on Farm Performance: A Case Study of Banana-Based Systems in Central and South-Western Uganda

“…Sustainable intensification of the land currently under agricultural production is required to avoid further expansion into forest-or non-cultivated land . Although fertilizer application is reported to have beneficial effects on banana production (Meya et al, 2020), adoption remains low due to high prices, low availability and poor market access. The practice is also only profitable in regions with good farm gate prices (e.g., close to Kampala) and good crop responses (e.g., Southern-Uganda) .…”

Nitrogen mineralization in soils cultivated with plantain (Musa AAB Subgroup plátano cv. Hartón), Zulia state, Venezuela

“…Una alternativa para reducir la cantidad de fertilizante químico aplicado la constituye la determinación de la cantidad de N que el suelo es capaz de proveer a las plantas (Herrera et al, 2017;Meya et al, 2020). Es por ello que, en este estudio se planteó evaluar la mineralización de nitrógeno en suelos cultivados con plátano con el fin de orientar las estrategias de manejo y realizar recomendaciones apropiadas de fertilización.…”

“…Los suelos de estudio fueron descritos por González-Pedraza et al (2014) como ligeramente ácidos a moderadamente ácidos, con porcentaje de carbono orgánico medio, clase textural franco limoso y franco en los An alternative to reduce the amount of chemical fertilizer applied is the determination of the amount of N that the soil is capable of providing the plants (Herrera et al, 2017;Meya et al, 2020). Due to this, it was proposed to evaluate nitrogen mineralization in soils cultivated with plantain in order to guide management strategies and make appropriate fertilization recommendations.…”