The aim of this experiment was to increasing production and iron content of the brown rice, through the biofortification program in paddy fields gripped the iron. The experiment was conducted in the Sub-District of Koto Baru, Dharmasraya, from March to July 2015. The purpose of the experiment is to produce, grain brown rice super high levels of iron, and increased production of brown rice. Methods of bio-fortification with iron in biofortification method in the fields of ferro gripped, by utilizing the technology package can increase production paddy cultivation reached 5.1 Mg ha -1 with the iron levels of 25.6 mg kg -1 Inpari 24.Brown rice tolerant varieties (Inpari 24) + Ameliorant cow manure 10 Mg ha -1 + System of square utama [(7.5 × 7.5 cm) × 25 cm × (7.5 × 7.5 cm)] + One seedling per planting point, age 10 day + plant growth regulators, auxin 5ml liter -1 can be used to achieve the growth and production of the best for brown rice varieties cultivation on paddy fields gripped Fe, especially in Koto Baru, District of Dharmasraya.
Salt solubility is the abiotic pressure which has the most effect on the loss of plant quantity and quality. Salinity not only makes plants stressful but also presents severe constraints on crop production so an attempt to understand plant adaptation mechanisms is important for expanding agricultural production on saline soils. This study aimed to obtain a mechanism for the adaptation of hybrid and composites maize to NaCl stress through anion and cation absorption patterns. The experiments were carried out at the LLDikti Region X Laboratory from May to August 2016. The experiments were arranged in a factorial complete randomized design with three replications. The first factor was corn varieties, namely: hybrid corn (Pioneer 22 and Bisi 12), and composite corn (Bisma and Sukmaraga). The second factor was level of NaCl, namely: 0.0 mg kg-1 NaCl pH 5.0, and 4,000 mg kg-1 NaCl pH 5.0. Measurement of anions and cations using Spectroquant Thermoreator TR Nova 420. The adaptability of hybrid maize and composites to NaCl stress occurred through the mechanism of anion absorption and cation metabolism. The difference in the percentage of NO3-, NO2-, PO4-, NH4+, and K+ levels between hybrid maize varieties and composites showed a difference in the adaptation ability of maize varieties to salinity stress.
Keywords: abiotic, mechanism, salinity, varieties
This study aims to obtain the interaction of rhizobacteria and soybean varieties, types of rhizobacteria effective in dissolving phosphate and varieties able to grow well on ultisol soil. The research were rhizobacteria isolation and rhizobacteria selection. Observations made were bacterial isolation, identification of morphological and physiological rhizobacteria (gram reactions, hypersensitive reactions, as phosphate solvents and germination test and rhizobacteria test of phosphate solvents by inplanta. The results showed that rhizobacteria isolates from ultisol soil of chilli plants, eggplant plants and rice roots obtained 32 isolates. The highest number of isolates were obtained from the ultisol soil of chili plants namely 18 isolates. The color of the rhizobacteria isolate colony was obtained by 27 cream isolates and 5 yellow isolates. The surface of the colony in the chili ultisol soil consisted of 3 groups namely arising, flat and convex, the surface of the colony arising obtained 8 isolates, the flat surface obtained 9 isolates and the convex surface obtained 1 isolate. All isolates were gram-negative From 32 rhizobacteria isolates, there were 2 isolates which were able to dissolve phosphate, namely RT1 and RC3. In mung bean plants with RT1 administration, the weight of the seed was 2.76 grams high compared to control and RC3.
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