RESPON PERTUMBUHAN DAN HASIL KENTANG VAR. CINGKARIANG DAN POPULASI GULMA TERHADAP ISOLAT RIZOBAKTERI INDIGEN

Potato (Solanum tuberosum L.) has been classified as major source of carbohydrate along with rice, wheat, and corn. As for other crops, potato’s growth yield are always subject to weed interference. An experiment conducted study the effect indigenous rhizobacteria promote potato var. Cingkariang population at Nagari Pakan Sinayan, Agam District, Province West Sumatra. The used a completely randomized design seven treatments three replications. was farm Sinayan i.e SWL2.2, Ag2L2S3.3, Ag2L2S4.2, Ag3L3S3.1, Ag3L3S5.1, Ag4S5.2, one group without isolate. Data were analysed analysis variance mean separation following DNMRT 5%. Results demonstrated that promoted plant height, number branches, weight tubers. also resulted in changes population. Ten species found prior follows: Ageratum conyzoides L., Alternanthera philoxeroides (Mart.) Griseb., Andrographis paniculata (Burm.f) Nees, Bidens pilosa Cyperus rotundus Crassocephalum crepidioides (Benth.) S. Moore, Eleusine indica Echinochola colona (L.) Link, Galinsoga quadriradiata Ruiz & Pav., dan Paspalum commersonii Lamk. However, new emerged during experiment. They Amaranthus spinosus Portulaca oleracea conjugatum P.J.Bergius indicating