Muhammad Aslam*, Dr.Ghulam Sarwar*,Shafiq Ahmad**,M.Haroon Ashraf*** *Sugarcane Research Station, Khanpur.
**Sugarcane Research Institute, Faisalabad
*** M.Sc Student, Agronomy Department, UAF
An investigation on the control of sugarcane lodging through chemical and cultural means was carried out at Sugarcane Research Station, Khanpur during 2010-11. The treatments included the application of Modus @ 320 ml/ac hundred days after sowing, earthing up with tractor ridger or spade and combined application of Modus and earthing up against untreated control. The results revealed significant improvement in cane weight, cane formation cane and sugar yields due to reduced cane lodging in treated plots against control. A measurable increase in cane yield and CCS up to 15.26 and 14.68 % was recorded in the plots where Modus was applied along with earthing up, respectively.
Globally sugarcane is the main source for sugar production. It has become the most important cash and industrial crop of Pakistan. The agricultural sector contributes about 22% to country’s GDP with sugarcane share of 0.7% (Jamil et al., 2007). Out of 12 major Cane growing countries of the world, Pakistan ranks 5th in area and production but 11th in cane yield and 7th in sugar production. One of the important factors affecting cane and sugar yields is lodging of cane stalks. A lodged sugarcane crop is more liable to damage by rodents. Its auxiliary buds sprout or may be damaged by rotting or false tillering starts which reduces cane weight and sugar recovery. Besides yield and quality losses, lodged cane remains no more fit for seed purpose. About 30% reduction in cane yield and 8.63% in CCS due to lodging has been reported by Ahmad, 1997. Sarwar et al., 2000 observed 27.50% increase in cane yield and 5.54% in CCS due to earthing up with cane ridger. In a field study under Faisalabad conditions, earthing up gave significant more cane yield over no earthing up (Anonymous, 2003). Afzal and Chattha, 2004 concluded that earthing up helps in sugarcane lodging as it gives sufficient anchorage to cane stalks. Earthing up should be done at the completion of tiller formation in the month of March for September planting and May-June for spring planting. Minhas et al., 2004 noticed that earthing up increased cane yield significantly through improvement in cane height, girth and tillers per plant. Aslam et al., 2008 carried out a two years field study and recorded 19.20% increase in final cane yield due to earthing up in presown sugarcane. A measurable increase in CCS was also noticed owing to reduced lodging in earthed up plots.
Keeping in view the drastic decline in cane and sugar yields due to lodging, the present studies were undertaken to chalk out strategy for reducing lodging in spring planted sugarcane.
MATERIALS AND METHODS
The studies were carried out at Sugarcane Research Station, Khanpur during 2010-11 to quantify the role of chemical and cultural means in reducing sugarcane lodging.
A commercial sugarcane cultivar SPF. 234 was sown by dry method in February using a seed rate of 75000 double budded setts per hectare. The experiment was laid out in RCBD with three replications and a net plot size of 6m x 10m. The row to row distance was 1.2m. The treatments included the application of Modus @ 320 ml/ac hundred days after sowing, earthing up with tractor ridger or spade and combined application of Modus and earthing up against untreated control. The crop was fertilized at the rate of 168-112-112 Kg NPK/ha. The whole P and K were applied at the time of sowing. The N was applied in three splits, 1/3 at the completion of germination, 1/3 at tillering and remaining 1/3 at the time of earthing up in the month of May. All other cultural practices were kept uniform at recommended level. The data on...