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EFFECTS OF PHOSPHORUS LEVEL AND SOIL TYPE ON THE GROWTH OF CARIBBEAN STYLO (stylosanthes hamata cv. Verano)
Abstract:
A pot experiment was conducted in a glasshouse at Samaru between June and September, 1989 to i n v e s t i g a t e the e f f e c t s of f i v e phosphorus l e v e l s and three s o i l types c o l l e c t e d from Samaru (Northern Guinea Savanna), Jos (Montane) and Sokoto (Sudan Savanna) on the growth of Caribbean s t y l o (Stylosanthes hamata cv. Verano). Most of the plant morphological a t t r i b u t e s , components of plant dry matter y i e l d and plant nutrient composition and uptake were s i g n i f i c a n t l y affected by phosphorus. In s o i l s collected from Samaru and J o s , phosphorus reduced days to 50% flowering and increased branch and nodule numbers while in the absence of added phosphorus Verano s t y l o planted into s o i l s collected from Sokoto flowered e a r l i e s t and produced the highest number of seeds and nodules. Phosphorus a p p l i c a t i o n increased dry matter y i e l d s of t o t a l plant and plant t o p . Yield of the root component was lowest and in fact declined further with phosphorus a p p l i c a t i o n. Phosphorus thus plays a g r e a t e r r o l e in increasing plant top dry matter y i e l d. The study suggested t h a t s o i l s collected from Jos suit seed production and would require up to 240 kg PpC/ha for t h i s purpose while s o i l s sampled from Samaru and Sokoto required 180 and 60 – 120 kg. P2O5/ha, r e s p e c t i v e l y for forage production. Nitrogen (N),phosphorus (P)tpotassium (K) and magnesium (Mg) concentrations peaked at 180 kg P2O5/ha, whereas uptake of these n u t r i e n t s maximised between 120 and 180 kg P2O5/ha. The N, P, K, Ca and Mg concentrations obtained in t h i s study were above the l e v e l s regarded as minimum needed for ruminant live weight maintenance- „ The need for f i e l d t r i a l s to support the findings in the present study was i n d i c a t e d.
EFFECTS OF PHOSPHORUS LEVEL AND SOIL TYPE ON THE GROWTH OF CARIBBEAN STYLO (stylosanthes hamata cv. Verano)
