Phosphorus trials in Leyte [Philippines]
2000
Almendras, A. | Taburada, L. | Fernandez, A. (Visayas State Coll. of Agriculture, Baybay, Leyte (Philippines))
Results showed that omission of phosphorus fertilizer in both Biliran and Matalom soils significantly stunted the growth and diameter and decreased biomass of Eucalyptus camaldulensis. Plants without P were 256% shorter and 102% smaller in diameter than plants with complete nutrition, especially during the first two months. The plants also have very low biomass production. This proved that both soils are deficient in phosphrous. P application increased height and diameter of Casuarina cunninghamiana, as early as 3 months after outplanting. Those applied with 618 g solophos/tree were 55% taller at 6 months and had 76% wider diameter at 9 months than those in the control group. Phosphate application at 309 g solophos/tree resulted in superior increase in height and diameter of Acacia aulacocarpa at 6 and 9 months after outplanting. Plants were taller (28% at 6 months and 42% at 9 months) and had wider diameter (35% at 6 months and 75% at 9 months) than the control group. Pterocarpus indicus had a significant height increase only after 9 months of seedling growth. An increase in height of about 16% was seen in plants applied with 309 g solophos while there was 13% increase in plants applied with 618 g solophos. Vitex parviflora showed height increase only after 19 months of P application. Those treated with 309 g solophos had 13% increase in height and those given 618 g solophos had 16% increase. No significant differences in the growth performance in both E. camaldulensis and V. parviflora were observed between plant applied with inorganic and chicken dung combination
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