Weeding frequency and its effect on the dominance of narrow-leaved weeds and the yield of lowland rice (Oryza sativa L.) in conventional systems
Frekuensi penyiangan dan pengaruhnya terhadap dominansi gulma berdaun sempit dan hasil padi sawah (Oryza sativa L.) sistem konvensional
DOI:
https://doi.org/10.31764/jau.v13i03.52Kata Kunci:
dominansi, frekuensi penyiangan, gulma, hasil padi, konvensionalAbstrak
Weeds are one of the main limiting factors in conventional paddy rice cultivation because they can reduce yields due to competition with rice plants. This study aimed to analyze the composition and dominance of narrow leaved weeds at various weeding frequencies and their effects on paddy rice yields. The study was conducted in Sukajaya Village, Tarogong Kidul Subdistrict, Garut Regency, from July to October 2024. The experiment used a completely randomized block design with five treatments, no weeding (P0), single weeding at 20 DAP (P1), single weeding at 40 DAP (P2), double weeding at 20 and 40 DAP (P3), and weeding three times at 20, 40, and 60 DAP (P4). The observed parameters included the dominance of narrow-leaved weeds, the dry weight of narrow-leaved weeds, and rice yield components. Weeding frequency significantly affected the dry weight of Echinochloa crus-galli weeds at 60 days after planting and the number of panicles per hill, but did not significantly affect the dry weight of Digitaria sanguinalis, Cynodon dactylon, panicle length, and dry grain harvest per hill. Based on the SDR value at 60 (DAP), Digitaria sanguinalis was the dominant narrow-leaved weed in lowland rice fields, while the highest dry grain harvest numerically was obtained in the treatment of weeding twice at 20 and 40 days after planting.. Further research on variations in weeding frequency is needed to suppress weed growth and improve rice yields
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