RESPONSE OF TWO RICE VARIETIES GROWN USING SRI METHOD IN TWO DIFFERENT LACATIONS

Background and Objective : Application of system of rice intensification (SRI) method has been considered as one of powerful efforts to increase the harvested yield by modyfying the plant and its surrounding environment. This study was aimed to determine the effect of different environment towards the response of rice varieties grown using SRI method. Materials and Methods : Two rice varieties, Batang Piaman and IR-42 were grown in District of Tanjuang Barulak (Regency of Tanah Datar) and District of Saniang Baka (Regency of Solok). Plant height and several yield parameters, such as productive tillers, panicle length, grain nmber per panicle, and yield per plot were assessed from both varieties and locations. Statistical analysis was canducted using block randomized design and significance was further evaluated using Duncan's New Multiple Range Test (DNMRT) with a p<0,05. Result : Batang Piaman appreared in taller performance than IR-42. Regarding the number of productive tiller, Batang Piaman resulted more productive tillers in Solok, while IR-42 was dominant in number of productive tiller compared to Batang Piaman in Tanah Datar. Unlike IR-42, Batang Piaman exhibited longer panicle, more grain amounts per panicle, and higher yield per plot than IR-42 in both locations. Key words : Batang Piaman, IR-42, Response, Rice, SR

Analysis of Phenotypic Variability and Correlation on Sugar Content Contributing Phenotypes of Salak (Salacca sumatrana Reinw var.Sidempuan. ) under Various Altitudes

Salak (Salacca edulis), commonly known as snake fruit, is one of Indonesia’s local fruit preference with a promising commercial prospect for the development of horticultural product. This fruit is a superior fruit commodity of Padang Sidempuan which has been recognized nationally. A significant change of geographical altitudes from lowland to highland supported the salak growth when planted in South Tapanuli. This study was aimed to evaluate the phenotypic variability as well as its correlation of salak planted in three different subdistricts of South Tapanuli representing low, mid and highlands. Sampling was conducted using purposive sampling method where 30 accessions of salak were collected from all those three subdi stricts in South Tapanuli. Both qualitative and quantitative traits were statistically analyzed and evaluated for its phylogenetic using NTSYS 2.02. According to the phylogenetic analysis, 37 morphological traits resulted in a similarity coefficient ranging from 0.34-0.68. Of all accessions tested, two accessions (MC4 and MC5) were closely clustered with a coefficient of 0.68. Moreover, 7 traits were positively correlated to sugar content, including plant height,number of fruit bunch, length and width of leaflet, number of leaf, fruit weight and flesh thickness. Keywords— snake fruit, germplasm, characterization, sugar content, correlation