RDE Abstract of Completed Research

Effect of De-trashing Standing Canes on Sugarcane Yield (2005)
T.S. Jereza, D.A. delos Santos.
To generate information on the effect of de-trashing standing canes on the growth and yield of sugarcane, the study was conducted at LGAREC in December 2003 to December 2004.
Results showed that the number of millable stalks of Phil 93-3727 increase when detrashed at 9 and 12 months after planting (MAP). Significant difference was also observed on plant height when the canes were de-trashed at 9 and 12 MAP.
Sugar yield per hectare (LKG/ha) significantly increased when de-trashing was done at harvest and when canes were de-trashed monthly starting at 8 months until harvest.
Other growth and yield parameter such as stalk length and diameter, tonnage (TC/Ha) and sugar per ton cane (LKG/TC) were either comparable and/or not significant among treatments.
Based on the findings of the study de-trashing of standing canes should be done at harvest for clean cane delivery to mills thus increasing sugar recovery.

Variety Performance at Different Ages of Harvest (2005)
M. Guevarra and B. Manlapaz
The 14 test varieties (Phil 90-1237, Phil 91-1091, Phil 92-0051, Phil 92-0751, Phil 93-3849, Phil 93-3727, Phil 93-3155, Phil 93-1601, Phil 93-2349, Phil 93-3727, Phil 93-3155, Phil p3-1601,Phil 93-2349, Phil 94-0913, VMC 84-524, VMC 86-550 and VMC 87-599) planted in March (late planting season) gave comparable canepoint germination, TC/Ha, LKg/TC and LKg/Ha when harvested at 10, 12 and 14 months after planter (MAP). Variety means significantly differ in all the aforementioned parameters. Age of harvesting means gave significantly higher TC/Ha and LKg/Ha at 12 and 14 MAP and significantly higher LKg/TC at 12 MAP.

Evaluation of Different Harvesting and Post-Harvest Practices on Sugarcane. Annual Repot, SRA (LAREC).(2004)
A.M. Burcer, R.A. Del Rosario, M.M. Guevarra and O.T. Quilloy
The study assessed the estimated losses in cane weight and sugar content of milled canes due to improper harvesting and post-harvest handling of sugarcane.
Cane tonnage and sugar losses among the varieties used in the study showed significant differences particularly on trashiness, weight of cane tops and uncut stubbles and canequality deterioration due to delay in milling.
Improper harvesting and handling of millable canes caused about 2% loss in cane and sugar per inch of uncut stalk base. Losses due to trashes and uncut cane tops can be as much as 18% due to trash deduction and 9% lower sugar yield. Topping of millable canes for canepoints can cause 20 to 30% reduction in cane weight or 17 to 26% less sugar. When topped and left standing in the field, losses due to delayed cutting/milling were about 1% in cane weight and 1.5% in sugar production per day. Losses of cane weight and sugar were more when green canes are cut and piled. Cane burning caused heavier losses in cane weight and sugar.

Evaluation of different harvesting and post-harvest handling practices of sugarcane (2000)
O. Quilloy, L. Santiago and R. Del Rosario
Increasing height of uncut stubble affected tonnage but not sugar rendement
As number of top points cut from the millable stalks increases, tonnage decreases but sugar rendement was improved.
Milled trashy cane has lower sugar rendement than the clean cane practice. Although milled trashy stalk without top has lower sugar rendement than the clean cane practice, still it has higher sugar rendement than the milled whole stalk and milled clean stalk with top.
Average sugar rendement of topped but remained standing green and burnt canes was higher and lower sugar loss than cut and piled green and burnt canes.

Prevention of post- harvest deterioration of sugarcane (1996)
S. Samiano, C. Lumanlan and A. Vitug
The application of different post-harvest treatments did not reduce cane tonnage, but significant cane weight losses were observed as delay in milling progresses.
Sugar rendement and sugar yields were significantly influenced by the different treatments and days of delay in milling after the canes were harvested. Perla soap solution (1%) sprayed on cane samples have the highest sugar rendement.
No interactions were observed between the treatments and days of delay on yield parameters measured. Based from the findings, harvested canes should be milled not later than three (3) days after harvesting.
Although Perla soap solution at 1% solution showed potential in reducing post-harvest losses, the economics of the practice must be thoroughly evaluated.

Improvement of sugarcane yield by removal of extraneous material before harvesting (1995)
M. Lazatin, S. Samiano and R. Del Rosario
Different clean cane harvesting practices were studied and evaluated to determine the improvements on sugar yield. No significant differences on weight and purity of the sample stalks analyzed and even on sugar yield (Lkg/Ha). However, the additional Lkg/TC improvement of the different practices proved the beneficial effects of practicing clean cane. Trash removal was more advantageous than the control and other practices which can guarantee additional net profit for the planter

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