Abstract
Limited water resources in dry land area become a crucial factor in crop production. The research aims were to determine the effect of irrigation network arrangement and application of biofertilizer on rice productivity, and the feasibility of developing irrigation infrastructure to increase farmers’ income. The study was conducted in Mbawa Village, Donggo District, Bima Regency, West Nusa Tenggara. In addition to repairing irrigation network, five different cultivation practices were applied, i.e. (1) farmer’s practice with integrated crop management, (2) farmer’s practices added with biofertilizers, (3) Recommended dosage fertilization, (4) Recommended dosage fertilization added with biofertilizer, and (5) farmer’s practices as control. Farming analysis was carried out by calculating farm cash flow, while the feasibility of developing irrigation infrastructure was carried out by calculating IRR, NPV and Net BCR. The results showed that application of biofertilizer increased the production of straw and rice yields. Farming and financial analysis of irrigation infrastructure showed that irrigation infrastructure investment was feasible to develop with a relatively fast return on capital and can increase farmers’ income. Through improved irrigation infrastructure, the use of biological fertilizers, and proper irrigation water management can increase rice productivity and farmers’ income.
Highlights
Management of water resources is one of the important aspects in increasing the cropping index, especially in dry land
Almost half of the dry land with a semi-arid climate was located in the Provinces of West Nusa Tenggara (NTB) and East Nusa Tenggara (NTT) (48.2%), and the rest spread in the east area of Indonesia [3]
This study aims were to understand the effect of biofertilizers and irrigation network infrastructure arrangement on rice productivity and profitability
Summary
Management of water resources is one of the important aspects in increasing the cropping index, especially in dry land. The use of biological fertilizers in flat rice fields can increase land and crop productivity. Biological fertilizers are useful for increasing the growth and productivity of food crops (rice/soybeans), horticulture (chilies/vegetables), and plantations (sugarcane) [6,7,8]. The use of biological fertilizers that increase plant productivity has been done somewhere, but has not been used at the farmer level for various non-technical reasons, such as unavailable in market during rice growing season and factors of farmers' habits [3]. This study aims were to understand the effect of biofertilizers and irrigation network infrastructure arrangement on rice productivity and profitability
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