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RDE Abstract of Completed Research

Fertilization of Sugarcane / Varietal response
Response of Phil 93-3155 and Phil 93-3727 Plant Cane and Ratoon Crop to Varying NPK Fertilization on Guimbalaon Clay Loam (2005)
R.M. Bombio, G.L. Talam, S.B.Tahum, et al.
 
The experiments were conducted in Guimbalaon sandy clay loam soul at SRA-LGAREC, La Ganja, la Carlota City to evaluate the response of Phil 93-3155 & Phil 93-3727 plant cane and ratoon crop to varying levels of NPK fertilization. Phil 93-3727 plant cane was laid-out on October 2002 and Phil 93—3155 was on November 2002.
 
Phil 93-3155. Significant variations in tonnage and LKG/ha of Phil Phil 93-3155 plant cane was due to the significant differences in stalk length and total millable stalks as influenced by nitrogen. The longest canes and the highest total millable stalks were obtained from the 150N treatment resulting to a high TC/Ha of this N treatment. The highest cane yield (109.06 TC/Ha) and sugar yield (245.62 LKG/ha) of newly planted Phil 93-3155 obtained at 150 kg N/ha were comparable with 50 and 200 kg N/Ha but significantly higher than 100 kg N/Ha. Application of 50, 100 and 200 kg N/Ha also gave comparable tonnage and LKG/Ha. Cane and sugar yield of all nitrogen treated plots were significantly higher than the 0 N treatment. Nitrogen rates did not anymore influence the cane and sugar yield of Phil 93-3155 during the ratoon crop. Sugar rendement (LKG/TC) was not significantly affected by N fertilization in both plant and ratoon cropping.
 
Phosphorous and potassium did not influence the yield of Phil 93-3155 in both plant cane and ratoon crop. Tonnage (TC/Ha), sugar rendement (LKG/TC) and sugar yield (LKG/Ha) among various P and K treatments did not differ significantly.
 
Phil 93-3727. Except in weight per stalk, growth parameters such as stalk length, stalk diameter and total number millable stalks were comparable among the different N rates in both plant cane and ratoon crop. Heaviest stalk was observed at 200 kg N/Ha, comparable with 100 and 150 kg N/Ha, significantly heavier than 50 kg N/ha and without N.
 
Phil 93-3727 (PC) fertilized with 200 kg N/Ha obtained a significantly higher sugar yield ILKG/Ha) due to high tonnage per hectare produced. This result however, was comparable with 100 and 150 kg/Ha, significantly higher than fertilization of 0 and 50 kg N/Ha. In ratoon crop, tonnage (TC/Ha- and sugar yield (LKG/Ha) regardless of rates did not suffer significantly, however significantly higher than without N.
 
Nitrogen fertilization did not influence the quality of juice (LKG/TC) extracted among the different treatments.
 
Varying levels of phosphorous and potassium, did not affect the yield of Phil 93-3727. Differences in the cane yield (TC/Ha), LKG/TC and LKG/Ha were not significant among treatments.
 
The highest net benefit in the plant cane was obtained using 150 kg kg N/Ha giving an ROI of 62.20%. In ratoon crop, N fertilization at 100 kg N/Ha gave the highest net benefit with an ROI of 73.64%
Response of Phil 94-0913 Plant Cane and Ratoon Crop to Varying NPK Fertilization on Guimbalaon Clay Loam (2005)
R.M. Bombio, G.L. Talam, S.B.Tahum, et al.
 
The experiments were conducted in Guimbalaon sandy clay loam soil at SRA-LGAREC, La Granja, La Carlota City to evaluate the response of Phil 94-0913 plant cane and ratoon crop to varying levels of NPK fertilization. Phil 94-0913 plant cane was laid-out on November 2002 and harvested November 2003 while the ratoon crop wa started November 2003 and harvested October 2004.
 
Phil 94-0913 plant cane gave the highest yield of 188.79 TC/Ha and 401.03 LKG/Ha at 150 kg N/Ha in combination with 150 kg/Ha P2O5 and 300 kg/Ha K2O. These yield results were comparable with 50, 100 and 150 kg N/Ha. P2O5 and K2O fertilization did not influence the yield of Phil 94-0913 plant cane.
 
Highest TC/Ha of Phil 94-0913 ratoon was obtained at 150-150-300 kg/Ha NPK while the highest LKg/Ha was observed at 200 kg/Ha NPK. Both yield data were comparable with 100 kg/Ha NPK. P2O5 fertilization gave significant yield at 150 kg/Ha, comparable with 200 kg/Ha. K2O had no significant influence on yield of Phil 94-0913 ratoon.
 
Sugar rendement (LKG/TC) of both plant and ratoon crops of Phil 94-0913 were not influenced by NPK fertilization.
 
Highest net benefit and return on investment (ROI) derived from nitrogen fertilization of Phil 94-0913 plant cane was attained at 150 kg N/Ha at constant rate of P2O5 and K2O (150 and 300 kg/Ha, respectively).
 
Phil 94-0913 ratoon obtained the highest net benefit and ROI at 200 kg/Ha N and 150 kg/Ha . P2O5 at constant rate.
Yield Response of Phil 92-0751 and Phil 92-0577 Ratoons to Varying Levels of NPK Fertilization. Annual Report, SRA (LGAREC) (2004)
BOMBIO, R.M., G.L. TALAM and S.B. TAHUM
 
The studies were conducted at La Granja Agricultural Research and Extension Center, La Granja, La Carlota City, to evaluate the response of Phil 92-0751 and Phil 92-0577 ratoons to various NPK fertilization levels in Guimbalaon sandy loam soil.
 
Cane and sugar yield (TC/Ha and LKg/Ha) of Phil 92-0751 first and second ratoons significantly increased with the application of nitrogen fertilizer. The highest cane and sugar yields of 134.05 TC/Ha and 241.66 LKg/Ha during the first ratoon and 84.74 TC/Ha and 176.72 LKg/Ha of the second ratoon, were obtained at 150 kg N/Ha. Both yield data were comparable with 100 and 200 kg N/Ha.
 
Phil 92-0577 first ratoon gave the highest yield of 127.79 TC/ha and 248.17 LKg/Ha at 150 kg N/ha combined with 150 kg P205/ha and 300 kg K20/ha. TC/Ha was comparable with 100 and 200 kg N/ha while LKg/ha was comparable with 200 kg N/ha.
 
Phil 92-0577 second ratoon obtained comparable cane yield (TC/Ha) among N treatments (50, 100, 150 and 200 kg/ha). Potassium fertilization gave the highest cane yield at 450 kg/ha that was comparable with 300 and 600 kg/ha, but gave comparable yields in LKg/Ha.
Varying levels of P205 and K20 fertilization did not significantly influence TC/Ha and LKg/Ha of Phil 92-0751 and Phil 92-0577 ratoons.
Yield Response of Phil 93-2349 and Phil 93-3849 Ratoons to Varying Levels of NPK Fertilization on Guimbalaon Clayloam. Annual Report, SRA (LGAREC) (2004)
BOMBIO, R.M., G.L. TALAM and S.B. TAHUM
 
The experiments were conducted in Guimbalaon clay loam soil at SRA (LGAREC) La Granja, La Carlota City from December 2002 to November 2003 to evaluate the response of Phil 93-2349 and Phil 93-3849 ratoon crops to varying levels of NPK fertilization.
 
Comparable cane (TC/Ha) and sugar (LKg/Ha) yields were observed among N treatments (50, 100, 150 and 200 kg/ha combined with 150 P205/Ha and 300 K20/Ha) during the ratoon crop. Phosphorus and potassium fertilization did not influence the growth and yield of Phil 93-2349 ratoon. Lkg/TC was not likewise influenced by NPK ferilization.
 
Phil 93-3849 ratoon crop obtained the highest yield of 92.95 TC/Ha and 189.84 LKg/Ha at 200 kg N/Ha but were also comparable with 150, 100 and 50 kg N/Ha fertilizer treatments.
 
P205 and K20 fertilization did not influence cane (TC/Ha) and sugar (LKg/Ha) yield of Phil 93-3849 ratoon crop. LKg/TC was not also affected by NPK fertilization.
Increasing the Efficiency of Applied Fertilizers on Sugarcane. Annual Report, SRA (LAREC) (2004)
MAGNAYE, A.M. and O.T. QUILLOY
 
Ammonium sulfate (21%N) and urea (46%N) were formulated into pellets in combination with either mudpress, zeolite or bentonite clay.
Cane tonnage and sugar yields obtained from the different pelletized forms of ammosul and urea were statistically comparable in both the plant cane and ratoon crops. The highest yields were observed on plant and ratoon canes fertilized with pelletized ammonium sulfate and zeolite.
 
Fertilizer requirements of Phil 8715, Phil 8829 and VMC 84-524 in Angeles loamy sand (2002)
Oscar Quilloy and Benjamin Manlapaz
The plant and ratoon performance of sugarcane on Angeles loamy sand was affected by varietal differences. Levels of N fertilization had significant influenced on cane and sugar yields. At varying levels of N applied at planting, VMC 84-524 gave better yields than Phil 8715 and Phil 8829 but their mean differences were not significant. The yield of the test varieties significantly increased with levels of N fertilization.
Significant increases in cane and sugar yields against zero N treatment were observed at fertilization levels of 90 to 270 kg/ha N. Fertilization higher than the recommended rate of 180 kg/ha N did not significantly improved yields. Ratoon cane yields of Phil 8715 and VMC 84-524 were significantly higher than Phil 8829. The amount of 90 and 180 kg/ha N fertilization gave more cane yield in the succeeding ratoon than the 0 and 270 kg/ha N treatments.. Similarly in the plant cane, the sugar yield of VMC 84-524 was slightly higher than Phil 8715 and Phil 8829. Sugar yield of ratoons at the 90 kg/ha N levels were higher than the 180 and 270 kg/ha N fertilization. The highest net profit/ROI in the plant and ratoon crop were observed on VMC 84-524 and Phil 8829 at 90 and 270 kg/ha N fertilization levels, respectively.
Fertilizer requirements of new sugarcane HYVs (1999)
Oscar Quilloy and Benjamin Manlapaz
The yield performances of Phil 8316, Phil 8514 and Phil 8839 were evaluated in Angeles loamy sand. Phil 8316 outyielded the other test varieties in terms of cane tonnage and sugar yields although differences between means are insignificant. Sucrose content in cane of Phil 8839 was higher although statistically comparable with Phil 8316 and Phil 8514. Applying 150-0-200 kg/ha of N and K20 produced the highest cane tonnage yields which were significantly better than the 0, 75 and 150 kg/ha N treatments and statistically comparable with the 225 kg/ha N, 150-150-0 kg/ha N and P205 and 150-150-200 kg/ha N, P205 and K20 fertilization levels. Sucrose content in canes among different levels of fertilization were comparable, although the highest Lkg/TC mean was attained at 150-150-200 kg/ha N, P205 and K20 fertilizer treatment. The highest sugar yield was likewise produced by the 150-150-200 kg/ha N-P205-K20 treatment although comparable with the 225-0-0, 150-150-0 and 150-0-200 kg/ha N, P205 and K20 fertilization levels
Nitrogen requirements of Phil 8361, Phil 8477 and Phil 8583 in Angeles loamy sand and Ibaan clayloam (1996)
Benjamin Manlapaz, Oscar Quilloy and A. Lumanlan
Growth and yield parameters of the different sugarcane varieties were observed to be significantly influenced by the prevalent agro-climatic conditions in the district where they were planted.
The performances of Phil 8361, Phil 8477 and Phil 8583 at varying levels of N in Angeles loamy sand and Ibaan clay loam were similar.
In Angeles loamy sand, Phil 8583 performed better than Phil 8477 and Phil 8361. Significant yield treatment against zero N fertilization was attained at the 200 kg N/ha application rate although ROI increased up to 300 kg N/ha rate of fertilization.
Phil 8361 and Phil 8477 produced statistically comparable cane and sugar yields although slightly higher than the standard variety Phil 7544 in Ibaan clay loam. Fertilization rates more than 100 kg N/ha did not significantly improve the yields of sugarcane. Maximum net profit was attained at 200 kg N/ha but the highest ROI was at the 100 kg N/ha fertilization rate.
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