58 Pflanzen (Botanik)
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Since the late middle of the 20th century, scientists have studied the agroforestry system as a potential land-use management solution to the problem of meeting the needs of a growing global population without jeopardizing efforts to maintain the ecosystem’s biodiversity or accelerating the adverse effects of climate change. This thesis introduces insights into the agroforestry system with a foundational understanding of the Chinese native tree, Paulownia tomentosa, commonly known as the Empress tree. The objective of this study is to evaluate the potential P. tomentosa that can bring attributes to agroforestry systems covering a literature finding earliest from 1961 to 2023. The observation of the fast-growing and large-shaped leaf has drawn attention to the potential use of biomass of P. tomentosa. Further research findings still need more effort to be considered on the focus of its nitrogen value, intercropping method, optimal yielding requirements, and expansion of cultivated in tropical or foreign habitats.
Black locust (Robinia pseudoacacia L.), a deciduous, nitrogen fixing tree of the family of the Fabaceae, can create opportunities as well as challenges in the areas it is found in. The gathering of information was done in three ways: 1) online research to gather basic information about the species, 2) communication with the Umweltbetriebe Kleve and the Niederrhein forestry office to obtain information about the situation in Cleve, Germany 3) visits to the different black locust stands to get an understanding of the situation. Black locust is a pioneer species with a short life span and is considered as an invasive neophyte in many European countries due to its strong suckering and ability to advance into habitats which then undergo an irreversible change in soil and species composition leading to biodiversity loss in especially threatened habitats such as dry grasslands. This is opposed by black locusts’ strong biomass production, making it well suited for plantation production, resulting in a strong, durable and fast growing multiuse wood as well as nutritious foliage which can be used as animal fodder or for the production of bioenergy. The 9 visited black locust stands situated in and around Cleve, Germany are well established middle-aged stands not used for the production of high value wood. These stands were considered as not threatening to their adjacent environments due to their being surrounded by streets, waterbodies and well maintained fields and parks making a spread unlikely. As the stands are quite old already letting them fade out by natural succession would be the recommended management method. Should the need for removal present itself, girdling would be the suggested technique as, even though it is quite time intensive, it is the least forceful method and thus minimises the possibility of a strong suckering reaction. In conclusion it can be said, that its usage and management system strongly depend on the location and closeness to threatened habitats, considering that, the environmental aspect should always be put before the economic benefits.
Uganda’s homegardens are highly diverse small-scale farming systems. They provide the majority of the food consumed by local people and preserve a large number of traditional crops. This booklet provides a guide to common crops found in southwestern Uganda’s homegardens. It features descriptions and uses for 68 crops divided into four sections according to crop type (annual crops, perennial herbaceous crops, shrubs and trees). Crops are ranked according to their ethnobotanical importance. Each section begins with the most important crop. Each page has four photos of the crop and includes the most common local names (in Runyankole and Luganda), as well as the common English and botanical names. Additional information on the uses and occurrences is provided as well.
We hope that this booklet will be of interest to a broad community of people interested in sustainable agriculture, food systems and food security issues: e.g. both Ugandan and international academics, non-government and government actors.