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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences AGRIVITA, Journal of Agricultural Science
BUDIMAN, BUDIMAN
Universitas Mulawarman
Agriculture, Biological Sciences & Forestry Environmental Science

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AN INTERACTION MODEL BETWEEN ENVIRONMENTAL FACTORS AND BLACK RICE GROWTH IN IRRIGATED ORGANIC PADDY FIELD Budiman, Budiman; Arisoesilaningsih, Endang
AGRIVITA, Journal of Agricultural Science Vol 37, No 1 (2015)
Publisher : Faculty of Agriculture University of Brawijaya and Indonesian Agronomic Assossiation

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Abstract

Black rice production in organic farming system does not meet the demand of local customers because of its low productivity. This research aimed to set an interaction model using multivariate analysis via smartPLS to identify environmental factors which simultaneously affects the growth of black rice. The growth of black rice in two irrigated organic paddy field in Malang, Indonesia was observed during planting period from November 2011 to March 2012. In each rice field, the growth was periodically recorded during planting periods: 19-29 days after planting (dap), 41-45 dap, 62-66 dap, 77-81 dap, 90-94 dap and 104-106 dap. Environmental factors such as water quantities, soil conditions, weed communities and cultivation system around the black rice population were also measured. Black rice growth was influenced simultaneously by water quantities, soil, weed communities and cultivating systems with predictive-relevance value reaching 92.83%. Based on the model, water quantities in paddy field is a key factor which directly and indirectly determined the growth and productivity of black rice.Keywords:  black rice growth, environmental factors, interaction model, organic paddy field
Growth Adaptation of Two Indonesian Black Rice Origin NTT Cultivating In Organic Paddy Field, Malang-East Java Budiman, Budiman; Arisoesiloningsih, Endang; Edi Wibowo, Ratno Bagus
Journal of Tropical Life Science Vol 2, No 3 (2012)
Publisher : Journal of Tropical Life Science

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This research is aimed to study the growth adaptation of two Indonesian black rice NTT in origin which is cultivating in organic paddy field in Malang - East Java and its problems during a planting period. A descriptive exploratory research was conducted in two organic rice fields in Kepanjen District, Malang Regency. Those fields were grown with two different varieties of black rice NTT in origin namely, Laka and Woja Laka. Each rice field was recorded periodically. The growth was including the plant height, biomass, density of tiller, panicle and spikes, dry seed weight and the problem correlated to pest and climates limitation. The results showed that Woja Laka and Laka black rice varieties slightly gave a different growth pattern. Laka variety was taller than Woja Laka, i.e. the Laka could reach 200 cm of height, while the Woja Laka was maximum 150 cm of height. However, the density of Woja Laka tiller and its panicle were almost double than the Laka ones. The dry seed weight and spikes number of Woja Laka were much higher than in Laka ones. In terms of organic farming system, Laka rice seemed to be more sensitive towards the strong wind conditions and bird or rat attacks rather than Woja Laka. Both pests attacked on both black rice along growing period, but rat preferred to attack vegetative part, otherwise bird strongly disturbed during generative period. Key words: black rice, growth, Laka, Woja Laka, organic paddy field
Co-Authors Arisoesiloningsih, Endang Edi Wibowo, Ratno Bagus Endang Arisoesilaningsih