Curly red chili (Capsicum annum L.) is widely cultivated us-ing inorganic fertilizers which causes high production costs. Chili is valued because of the level of spiciness. The level of spiciness of chili is determined by the level of capsaicin which is affected by nutrients in the growing media. The nutrient of the planting media can be fulfilled by degrading the growing media by microbes in organic fertilizer. One type of organic fertilizer containing degrading microbes is biofertiliz-er. Biofertilizer and biogas sludge is one of the organic fertilizers con-taining microbes and organic materials that are able to support nutri-ent levels of the planting medium. This study aimed to analyze growth parameters include chlorophyll content and measure capsaicin levels in curly red chili. Which given biofertilizer and biogas sludge in vari-ous dosage and determine the optimum dose of the fertilizer. The study was conducted at an agricultural demonstration plot in Wukirsari Vil-lage, Cangkringan, Sleman. The study design used RCBD (Randomized Complete Block Design), the data were analyzed by ANOVA (Analysis of Variance followed by Duncan’s Multiple Distance Test (DMRT) at the 95% confidence level. The highest growth parameters and capsa-icin content were obtained on curly red chili plants which were given biogas sludge 36 mL + biofertilizer 10 L / ha. The application of bi-ofertilizer and biogas sludge in various concentrations given has not been able to increase the average total chlorophyll content of curly red chili plants. Thus, it can be concluded that the most appropriate dose of curly red chili is 36 mL biogas sludge + 10 L bio fertilizer/ha

No abstract

Abstact Curly red chili (Capsicum sp.) is an important agricultural commodity in Indonesia. The pattern of conventional cultivation using inorganic fertilizers has caused high production costs. While the level of spiciness of chili determined by capsaicin levels is strongly influenced by nutrients in the growing media. Bio fertilizer and sludge biogas are the organic fertilizers proved to be able to increase the growth and productivity of rice plants. The aim of this study is analizing growth parameters and chlorophyll content, measure capsaicin levels in curly red chilli (which is given bio fertilizer and biogas sludge biogas in various dosage) and determine the optimum dose of the fertilizer. The study was conducted at an agricultural demonstration plot in Wukirsari Village, Cangkringan, Sleman. The study design used RCBD (Randomized Complete Block Design). The data were analyzed by ANOVA (Analysis of Variance) followed by DMRT (Duncan's Multiple Distance Test) at the 95% confidence level. The highest growth parameters was obtained on curly red chili plants which were given sludge biogas 36 mL + bio fertilizer 10 L / ha. Thus, it can be concluded that the most appropriate dose of curly red chili is 36 mL sludge biogas + bio fertilizer 10 L/ha.

Climate change causes an increase in soil salinity, hence reduce rice growth and productivity. The application of silicate fertilizer as a source of silicon (Si) can be encouraged to enhance the rice tolerance against biotic and abiotic stresses. This study aimed to analyze the potential of silicate fertilizer to alleviate the salinity stress on red rice. A pot experiments was conducted to observe the physiological and biochemical aspects. Rice seedlings were treated with three doses of rice husk ash/RHA (0, 4, and 8 tons ha-1), and three levels of salinity stress, namely control (0 dS m-1), low (3 dS m-1), moderate (7 dS m-1), and high (10 dS m-1). The observed parameters were plant height, number of tillers, plant biomass, activity of superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT), levels of chlorophyll, carotenoid and proline. The results showed the growth of red rice ‘Sembada Merah’ was inhibited by moderate and high salinity stress as indicated by a decrease in plant height, number of tillers and plant biomass. Photosynthetic pigment chlorophyll and carotenoid levels decreased with the increasing salinity stress. RHA application increased SOD activity as a response to enhance salinity stress tolerance. At doses of 4 t ha-1, RHA could maintain rice growth up to moderate salinity stress.