Bahasa Indonesia

The aim of the study was to determine which weed species had a significant effect on the reduction of maize yields, so that it could be determined which species should be controlled and which should not be controlled. The research was carried out using a descriptive method on dry land in Mumbul Sari Village, Bayan, North Lombok. Collecting data on population and growth of weeds and plants, using sample plots measuring 1 m2 placed at 10 points by random sampling. Parameters observed were weed species population, corn crop population plot-1, dry biomass weight of plot-1 weed, dry biomass weight of plot-1 corn, and dry seed weight of corn plot-1. Quantitative data analysis by calculating the value, relative density (RN), relative frequency (RF) and relative dominance (RD) to calculate the significant value index (SVI), and Summe Diminance Ratio (SDR). There were 2 species of puzzle weed, 10 species of Poaceae weed and 13 species of broadleaf weed. One species of puzzle weed, namely Cyperus rotondus and 3 species of Poaceae Digitaria longiflora, Paspalum conjugatum and Panicum repens, and 2 species of broadleaf weed, Amaranthus spp., and Synedrella nodiliflora, were very dominant and continued to exist during plant growth with respective SDR values each species 10.43%; 15.37%; 10.20%; 9.67 %; 10.00% and 5.80%. The competitiveness and relative weighted dominance of the 6 weed species were higher than other weed species, so that the six weed species were able to eliminate the average maize yield since the plants were 30 – 90 as much as 17.90%; 16.78%; 12.35%;10.88%; 9.18% and 3.40%Penelitian bertujuan untuk mendapatkan spesies gulma yang berpengaruh signifikan  terhadap penurunan hasil tanaman jagung, sehingga dapat ditentukan skala prioritas spesies yang harus dikendalikan dan tidak perlu dikendalikan. Penelitian dilaksanakan dengan metode deskrptif pada tanah tegalan di Desa Mumbul Sari, Bayan, Lombok Utara. Pengambilan data populasi dan pertumbuhan gulma serta tanaman,  menggunakan petak sampel berukuran 1 m2 yang diletakkan pada 10  titik secara random sampling.  Parameter yang diamati adalah populasi spesies gulma,  populasi tanaman jagung petak-1, bobot biomas kering gulma petak-1, bobot biomas kering jagung petak-1, dan bobot biji kering jagung petak-1. Analisis data secara kuantitatif dengan menghitung nilai, kerapatan nisbi (KN), frekuensi nisbi (FN) dan dominansi nisbi (DN) untuk menghitung indeks nilai penting (INP), dan Summe Diminance Ratio (SDR). Ditemukan 2 spesies gulma teki,  10 spesies gulma poaceae dan  13 spesies gulma berdaun lebar.  Satu spesies gulma teki yaitu Cyperus rotondus dan 3 spesies gulma Poaceae Digitaria longiflora, Paspalum conjugatum dan Panicum repens, serta 2 spesies gulma berdaun lebar yaitu Amaranthus spp., dan  Synedrella nodiliflora, sangat dominan dan tetap eksis keberadaannya selama tumbuh tanaman dengan nilai SDR masing-masing spesies 10,43%; 15,37%; 10,20 %; 9,67 %; 10,00 % dan 5,80%. Daya saing dan dominansi terbobot nisbi 6 spesies gulma tersebut lebih tinggi dibandingkan spesies gulma lainnya, sehingga keenam spesies  gulma tersebut mampu menghilangkan hasil tanaman jagung rata-rata sejak tanaman berumur 30 – 90 sebanyak  17,90 %; 16,78 %; 12,35 %;10,88%;  9,18 % dan 3,40 %