Evaluation of response of sounum nigrum vegetable to organic and inorganic fertiliser combination at Nyamonyo village, Kisii, Kenya
2002
Onyango, M.(KARI-Regional Reseach Kisii, Kenya)
Solanum nigrum (black nightshade) vegetable is popular in southwest Kenya. The productLon of this vegetable is dominated by smallholders who grow it in kitchen gardens mainly for subsistence and to sell surplus. The yields of this vegetable have been declining because of low soil fertility and poor production practices by the farmers. A participatory rural appraisal was carried out in Nyamonyo village in southwest Kenya tQ understand farmers' constraints and identify possible solutions. Following the appraisal, experiments were conducted in the village between 1995 and 1998 to evaluate the effects of organic and inorganic fertiliser on the yield of Solanum nigrum with the aim of improving vegetable production for domestic consumption and for cash income. Compost prepared by the farmers was used in the trial. The treatments were 200 kg Diammonium phosphate (DAP) 46% PzOs; compost at 10 t ha-I compost at 10 t ha-I plus 50 kg DAP; compost at 10 t ha-I plus 100 kg DAP and finally, a non-fertilised check. There were significant differences in leaf yield obtained from the treatments. The vegetable yield of the treatments with combinations of the two fertilisers were not different from the recommended 200 kg DAP, but were better than the yields obtained from compost alone and the unfertilised check. Farmers evaluated the treatments and chose a combination of compost and quarter or half of the recommended inorganic fertiliser rates.
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