Establishment of dwarf long-bean on sand tailings
2008
Lim, A.H. | Vimala, P.., MARDI, P.O. Box 12301, 50774 Kuala Lumpur (Malaysia). Strategic Resources Research Centre
A field experiment was conducted to determine the yield response of dwarf long-bean grown on sand-tailings (95% sand) to organic and inorganic fertilizers. Treatments comprised of poultry manure (15% moisture) at 0,15,30,45 and 60 t/ha and inorganic fertilizer (N: P2 05 : K20: MgO = 12 : 12: 17 : 2 + trace) at 0,0.75 and 1.5 t/ha. Results obtained showed that increasing rates of both poultry manure and inorganic fertilizer increased yields significantly. Without inorganic fertilizer, yields ranged from 4 - 13 t/ha only, when poultry manure was increased from 0 to 60 t/ha. At the second level of inorganic fertilizer (0.75 t/ha), yields ranged from 9 - 26 t/ha when poultry manure increased from 0 to 60 t/ha. At the highest level of inorganic fertilizer (1.5 t/ha), yields ranged from 9 - 28 t/ha when poultry manure was increased from 0 to 60 t/ha. The yield response to poultry manure at 1.5 t/ha inorganic fertilizer can be represented by the equat ion Y= -0065x2 + 0.6712x + 10.5. The optimum rate of poultry manure is 51 t/ha. The expected yield at this rate is 28 t/ha. It is concluded that about 45 - 50 t/ha of poultry manure and about 1.5 t/ha of inorganic fertilizer can be recommended for the conventional cultivation of dwarf long-bean on sandtailings with expected yields of about 28 t/ha. For organic cultivation, at least 50 t/ha of poultry manure is required but the yield obtained would be half the yield under conventional cultivation.
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