The Effect of Plant Spacing on Upland Brown Rice Varieties on The Growth and Yield on Unproductive Rubber Plantation

Abstract

The purpose of this study was to determine the effect of planting distance on the growth and production of various red-grain upland rice varieties planted on immature rubber plantations. This research was conducted at the Sungei Putih Research Institute, Rubber Center, Galang District, Deli Serdang Regency, with an altitude of 80 meters above sea level from September 2020 to February 2021.This study was conducted using the Split Plot Design method using two factors, namely: Factor 1 in the form of Varieties Test with the notation (V) consisting of 4 varieties, namely V1 (Sigambiri Merah), V2 (MSP 17), V3 (Hamparan Perak), V4 (Kambiri Lumat), and Factor 2 in the form of Planting Distance with the notation ( J) which consists of 4 levels, namely J1 (20cm x 20cm), J2 (25cm x 25cm), J3 (20cm x 30cm), and J4 (40cm x 20cm).This research was conducted with 2 replications. Observation parameters consisted of plant height, number of tillers, age of flowering, age of harvest, number of panicles per bed, number of panicles per plant sample, weight of grain per bed, weight of grain per plant sample, and weight of grain per 1000 grains. The results showed that the best plant height was in treatment V1 (140.31cm), number of tillers (stems), flowering age (days), harvest age (days), number of panicles per sample (grams), number of panicles per bed (kg), the best grain weight per sample (grams), the best grain weight per bed (kg) was in treatment V2, the best planting distance was in treatment J4 on the parameters of plant height and number of tillers, while the best grain weight per bed was found in treatment J1.