ty -jour a2 -nayak，amaresh K. au- sitienei，kibet au -kamiri，kamiri，hellen W. au -nduru -nduru，gilbert M. au -kamau -kamau，david M. py -2018 da -2018/2018/2018/11/11/18 ti-营养预算 - 营养预算and Economic Assessment of Blended Fertilizer Use in Kenya Tea Industry SP - 2563293 VL - 2018 AB - Kenya’s tea industry depends predominantly on imported compound NPK fertilizers to replenish nutrients removed through plucking. These fertilizers cannot be easily manipulated for specific soils and tea clones. They also frequently become hazardous within tea-growing environments. In this respect, two fertilizer blends containing NPKS 25 : 5 : 5 : 4 + 9Ca + 2.62Mg and NPKS 23 : 5 : 5 : 4 + 10Ca + 3Mg with trace elements have been produced commercially in the country. However, the extent to which the blended fertilizers may contribute to optimal economic gains without degrading the environment has not been determined. This was the knowledge gap that this study seeks to address. The goal of this study was to evaluate the economic efficacy of fertilizer blends with the aim of identifying optimal levels of application which would maximize tea productivity with minimal negative impacts on the environment. The study hypothesized that blended fertilizers maximize productivity of tea clones with minimal environmental damage. The fertilizer blends were evaluated in two study sites, i.e., Timbilil Estate in Kericho and Kagochi farm in Nyeri. The sites were selected purposefully, one in the eastern and the other in the western tea-growing areas. The trial was laid out in randomized complete block design with two fertilizer blends and the standard NPK 26 : 5 : 5 as control. The treatments were applied at four fertilizer rates (0 (control), 75, 150, and 225 kg·N·ha^-1·YR^-1），复制三次。收集叶片样品并分析营养摄取以及相关的产量和经济趋势。经济最佳氮率（EONR）在75 kg·n·ha处达到^-1·YR^-1在Kagochi，所有肥料都有所有肥料，而在Timbilil，EONR是可变的，在75至225 kg·n·ha之间^-1·YR^-1肥料类型。这项研究表明，基于经济的观点，“ A”混合是两个地点的生产和经济回报中最有效，最一致的肥料。SN -1687-7667 UR -https：//doi.org/10.1155/2018/2563293 DO -10.1155/2018/2018/2018/2563293 JF-应用和环境土壤科学PB -Hindawi KW -er -er- ER-