Abstract
A pot experiment was conducted under rainfed condition to study the effect of water hyacinth compost on the morpho-physiological parameters of soybean (Glycine max L.) at the Teaching and Research Farm of Faculty of Agriculture and Veterinary Medicine, Imo State University, Owerri. The treatments were control (T1) 100g (T2), 150g (T3) and 200g (T4) of water hyacinth compost and replicated four times. The treatments were arranged in Complete Randomized Design (CRD). The parameters measured were plant height, number of leaves, leaf area (cm2), leaf area index, relative growth rate (RGR), Net assimilation rate (NAR), shoot dry weight(g), yield and yield components (Number of pods, pods weight, 100 seed weight). The results obtained indicated that T3 significantly produced highest plant height (57.6cm) compare to control. While it was observed that T4 (200g) significantly produced the highest number of leaves (233.25), leaf area (631.80cm2), shoot dry weight (15.445g), number of pods (129.75), pod weights (25.38g) seed weight (7.23g) and yield (0.72kg/ha) relative to control and other treatment levels. Root parameters were also significantly improved by the rates of water hyacinth application compared to control. It will be worthy to note that there was no nodulation perhaps that was why the yield was poor. The results showed that soybean growth can effectively be improved with incorporation of water hyacinth into soil.
Highlights
Organic manuring is becoming an important component of environmentally sound Sustainable agriculture
The result showed that application of water hyacinth compost significantly improved the plant height
Among the treated plots T2, recorded the lowest plant height (19.400cm), this was followed by T4 with plant height of 21.325cm but not significant to each other
Summary
Organic manuring is becoming an important component of environmentally sound Sustainable agriculture. Commonly known as the water hyacinth family pontederiaceae and has a cosmopolitan distribution but are mostly found in warmer areas [4]. Water hyacinth is a free-floating aquatic weed which are considered nuisance around the world and very disturbing ecological processes [5.6]. Eichhornia crassipes have an environmental impact and socio-economic serious aquatic ecosystems from tropical and subtropical regions [7.8]. This plant has a rapid growth, large biomass, and tolerance for many metals / metalloids such as arsenic [9], cadmium [4], chromium [10], copper [11], iron [12], nickel [13], and zinc [14]. Eichhornia crassipes is the plant to reduce and absorb toxic heavy metals and other pollutants from wastewater [15]
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