부산대학교 도서관

Assessment of nutrient management (NM) technologies for sustainable crop production requires a detailed understanding of the entire production system and how it affects quantity and quality of the yield, economic profitability, energy balance, environmental health, and soil quality. The influence of NM technologies on broccoli (Brassica oleraceaL. var.italicaPlenk) productivity and quality and effects on soil were determined. Fifteen NM technologies including a control (farmer’s production practice with 80N–15P kg·ha−1of fertilizer); organics (vermicompost, cow manure, and mustard oil cake); inorganic fertilizer (recommended N–P–K at the rate of 150–33–63 kg ha−1and 125% of recommended N–P–K [N–P–K^]); and their selected combinations were tested. Cow manure at 6.25 Mg·ha−1+ 125% of recommended N–P–K outperformed others with higher curd yield (11.4 Mg·ha−1), greater energy efficiency (net energy 39 GJ·ha−1; output–input energy ratio 2.77), higher economic return (benefit–cost ratio 8.7; marginal rate of return 25.3), and greater soil (2.65) and crop quality index (9.80). Organics used alone or in combinations were less productive, energetically less efficient, and less profitable compared to inorganic or integrated NM practices for growing broccoli under hot, humid, subtropical conditions. [ABSTRACT FROM AUTHOR]