Abstract
The aim of the experiment was to evaluate the use and influence of Bat guano and Nettle slurry on the growth, flowering and mineral absorption of Delosperma cooperi and Sedum rubrotinctum plants. The 3 experimental groups in cultivation were: (1) group without biostimulants (CTRL), irrigated with water and previously fertilized substrate; (2) group Bat guano (BG) and fertilized substrate; (3) group Nettle slurry (Urtica dioica L.) (UD) and fertilized substrate. Treatments with Nettle slurry and Bat guano resulted in a significant improvement in the growth and flowering characteristics of Delosperma cooperi and Sedum rubrotinctum. The test showed in fact a significant increase in the agronomic parameters analysed in plants treated with Bat guano and Nettle slurry. In fact, all the plants treated with (BG and UD) showed a significant increase in the number of leave, flowers and inflorescences, in the vegetative, radical and inflorescence weight, in the flowering time. The test also resulted in an increase in the NPK mineral absorption and chlorophyll content of plants treated with bat guano and nettle slurry.Interesting aspects that make Bat guano and Nettle slurry valid alternatives to be used as plant biostimulants, when the plants are subjected to biotic and abiotic stresses, in particular transplant, water and salt stress.
Highlights
Delosperma is a big and varied genus, including more than 150 species, tuberous, of variable appearance for shape, size and colour, mostly bushy and upholstered
Plant growth The test showed a significant increase in the agronomic parameters analysed in plants treated with bat guano and nettle slurry
There was a significant increase in vegetative biomass in (BG) 109.66 g and (UD) 93.92 g, compared to 76.32 g of the control (Figure 1C)
Summary
Delosperma is a big and varied genus, including more than 150 species, tuberous, of variable appearance for shape, size and colour, mostly bushy and upholstered. The branches may be erect, or creeping, at times deciduous. Cultivated for the abundant and solitary flowers, of red, white, yellow colour, which are usual to open early in the morning and close towards evening. Its habitat is southern Africa, Kenya, Eritrea, Arabia and Madagascar. The tuberous species: abyssinicum, mahonii, nakurense, oehleri, steytlerae, require a minimum of 10-12°C [1]
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