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Weed Competitiveness of Some Aerobic Rice Genotypes.
Author(s):
1. Aliyu Isah Taketsaba: Department of Agricultural Education, School of Vocational Education, Federal College of Education (Technical), P.M.B. 1088, Zaria Road Gusau, Zamfara State, NigeriaDepartment of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia
2. Abdul Shukor Bin Juraimi: Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia
3. Mohd Rafii Bin Yusop: Institute of Tropical Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia
4. Radziah Bt Othman: Department of Land Management, Faculty of Agriculture, Universiti Putra Malaysia, UPM Serdang 43400, Selangor Darul Ehsan, Malaysia
5. Ajit Singh: School of Biosciences/Sciences, The University of Nottingham Malaysia Campus Jalan Broga 43500, Semenyih, Selangor Darul Ehsan, Malaysia
Abstract:
The present study was carried out in the field for two rice growing seasons to evaluate the weed competitiveness of some rice genotypes under the aerobic condition for their suitability of growing in tropical southeastern Asia. The experiments consisted of two (2) weeding regime (weed-free and weedy check) and three aerobic rice genotypes (MRIA1, MR219-4 and MR219-9). Results revealed that weeds had negative impact on rice plants. MR219-9 recorded the lowest weed population including weeds biomass and the maximum of it was recorded in MRIA1 in both seasons. The majority of the weeds were grasses that constituted over 46% of the totaled dominance-ratio. Digitaria horizontalis Willd., Paspalum scrobiculatum L. and Eleusine indica (L.) Gaertn were the most dominant weeds in 1st season, while broadleaves highly dominated the weeds flora constituted more than 48% of the totaled dominance-ratio with Cleome rutidosperma DC., Ageratum houstonianum Mill. and Mimosa pudica L. were the most dominant weeds in the 2nd season. When compared with other genotypes, MRIA1 with features of tall plant height, few tillers, less growth period competed poorly with weeds than other genotypes (MR219-4 and MR219-9) with shorter plants, many tillers and long growth duration. Lower weed biomass, higher weed competitive index and comparable loss of yield recorded in MR219-9 showed its greater ability of weed suppression and tolerance. The results of this study, therefore, concluded that MR219-9 is the most competitive genotype against weeds in aerobic condition.
Page(s): 583-593
Published: Journal: International Journal of Agriculture and Biology, Volume: 20, Issue: 3, Year: 2018
Keywords:
Keywords are not available for this article.
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