Identifikasi keanekaragaman dan dominansi gulma pada lahan pertanaman jeruk (Citrus sp.)

Sari Gulma merupakan tumbuhan yang mengganggu tanaman budidaya. Penelitian bertujuan untuk mengidentifikasi keanekaragaman dan dominansi gulma pada lahan pertanaman jeruk (Citrus sp.) di dataran medium Kabupaten Garut. Penelitian dilaksanakan pada Bulan April sampai Juni 2018. Metode penelitian adalah statistik kualitatif melalui studi kasus. Pengambilan sampel dilakukan pada 5 plot yang berbeda dengan luas pengambilan sempel gulma masing-masing 50 cm x 50 cm / plot. Setiap lahan terdapat 5 titik pengambilan sampel. Setelah didapatkan sampel gulma, maka dilakukan identifikasi gulma dan Summed Dominance Ratio. Hasil penelitian teridentifikasi 6 jenis gulma rumput, 3 gulma teki dan 13 jenis gulma daun lebar dengan indeks keanekaragaman yang rendah. Jenis gulma yang dominan adalah gulma Ciperus rotundus dan Amaranthus spinosus L. Kata Kunci: dominansi, gulma, identifikasi, jeruk, keanekaragaman.Abstract. Weeds was plants that interfere with cultivated plants. The aim of this research was to identify the diversity and dominance of weeds on Citrus (Citrus sp.) in medium land of Garut. The study was conducted in April to June 2018. The qualitative method is used through case study. Sampling was conducted on 5 differents plot weed with size 50 cm x 50 cm per plot. Each plot had 5 sampling points. Weed samples were collected and it was identified per species according to the weed group, then it was calculated by Summed Dominance Ratio to see weed dominancy at each site locations. The results of the study identified 6 types of weed grass, 3 weed cyperus types and 13 types of broad-leaf weeds with low diversity index. The dominant types of weeds in citrus was Cyperus rotundus and Amaranthus spinosus L.  Keywords: citrus, diversity, dominant, identification, weed.