An evaluation of mechanical row weeders and effects of wedding levels on vegetative components of rice under the System of Rice Intensification (SRI)
2015
Wan Ishak W. I. | Suleima S. | Muhammad Razif M. | Muhd Saufi M .K.
The System of Rice Intensification (SRI) is a new and promising resource-saving method of growing rice under irrigated or rain-fed conditions with an impressive average yield of 7tons/ha. However, the major constraints to achieving the full adoption of SRI practice are the intensive labour requirement especially in transplanting and mechanical weeding up to 40days after transplanting (DAT), hence farmers in Tanjung Karang of Malaysia adopting SRI fabricate locally made rotavators for row weeding in paddy fields. This research was conducted to evaluate performance of four different types of local SRI rotavators that control weeds at different paddy growth stages, and the effect of weeding levels (10, 20, 30 & 40DAT) on the vegetative component of rice. Experimental field was located at Tanjung Karang Irrigation Scheme, Malaysia. A split plot design with four main plots and four sub plot treatments (speed levels) was used, with four replications. Results indicates that due to low ground clearance, all four treatments (rotavators) were not able to weed at 40DAT. The effect of machine revolution per minutes (rpm) on weeding efficiency, field capacity and crop damage were evaluated and found to be significance at (P ≤ 0.05) levels. Similarly, the effect of weeding levels was significant on number of tillers and paddy height at (P ≤ 0.05) level of significant.
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