Abstract
Turnover of organic matters to the soil can increase the efficiency of chemical fertilizers, improve the plant growth and sustain the environment. Field experiment was carried out in the Buyut Udik Village, Gunung Sugih District, Central Lampung from May to August 2009. Rice straw was composted by three kinds of decomposer (bioactivator A, B, and C). Rice straw compost (2 Mg ha-1) was applied to the paddy-field soil that was planted by rice (Oryza sativa) of Ciherang Variety. The experiment was arranged in a randomized block design with three replicates. The results showed that application of rice straw compost reduced the numbers of empty grain per tiller compared to control (without compost) in which control had the highest percentage of empty grain (15.9%). The application of rice straw compost that was decomposed by bioactivator A gave the highest numbers of grain per panicle and yield per plot as followed 162.5 seed and 33 kg plot-1, respectively. Application of various rice straw composts that were decomposed by three kinds of bioactivator increased the rice grain up to 13-26% compared to control.
Highlights
The acid dry land has a great potential to be expanded as the effort for planting soybeans. Sudaryono et al (2007) reported that an identification of acid dry land issues included: limited water availability, acidic pH, sensitively high erosion, fertilization and amelioration not appropriate, nutrient leaching and toxicity of Al, low levels of soil organic matter, low fertilization efficiency, and degradation of productivity
Isolation of microbial was carried by Nitrogen Fixation Bacterial (NFB) selective medium for symbiotic nitrogen-fixing bacter ial presented by Vincent (1970) with compositions of KH2PO4 0.4 g; MgSO4.7H2O 0.2 g; NaCl 0.1 g; CaCl2.2H2O 0.026 g; FeCl3.6H2O 0.017 g, Na2MoO4.2H2O 2 mg; DL-malic acid 3.58 g; bromothymolblue 0.025 g; agar 1.75 g, and distilled water to 1 L
Plant growth or soil microbial population dynamics were determined by soil properties in which as growth environment (Cao et al 2008)
Summary
The acid dry land has a great potential to be expanded as the effort for planting soybeans. Sudaryono et al (2007) reported that an identification of acid dry land issues included: limited water availability, acidic pH, sensitively high erosion, fertilization and amelioration not appropriate, nutrient leaching and toxicity of Al, low levels of soil organic matter, low fertilization efficiency, and degradation of productivity. The acid dry land has a great potential to be expanded as the effort for planting soybeans. Sudaryono et al (2007) reported that an identification of acid dry land issues included: limited water availability, acidic pH, sensitively high erosion, fertilization and amelioration not appropriate, nutrient leaching and toxicity of Al, low levels of soil organic matter, low fertilization efficiency, and degradation of productivity. Management of acid dry land is required to improve crop productivity optimally. Acid dry land management strategies can be done through a high input by liming and fertilizing P or low input by addition of organic manure, crop rotation, legumes and alley cropping, integrated management, increasing nutrient efficiency, organic-inorganic fertilizer combination (Vestberg et al 2002). The biological management of acid dry land is surely being interesting to achieve sustainable agricultural systems.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
