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首页> 外文会议>Conference of the Australian Society of Sugar Cane Technologists >AN ECONOMIC EVALUATION OF CONTROLLED RELEASE AND NITRIFICATION INHIBITING FERTILISERS IN THE BURDEKIN
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AN ECONOMIC EVALUATION OF CONTROLLED RELEASE AND NITRIFICATION INHIBITING FERTILISERS IN THE BURDEKIN

机译：受控释放和硝化抑制肥料抑制肥料的经济评价

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The use of controlled release and nitrification inhibiting fertilisers may improve the availability and uptake of Nitrogen (N) by sugarcane under certain soil and climatic conditions, while reducing losses via leaching, runoff and denitrification, andincreasing nitrogen use efficiency. This paper utilises production and operational data from twelve Burdekin trial sites during the 2014-15 growing season to evaluate the profitability of using these fertilisers. In particular, this paper examines whether these fertilisers can maintain farmer profitability at N application rates lower than a conventional rate based on the Six Easy Steps guidelines. Out of the 12 trial sites, nine tested rates 40 kg N/ha lower and three tested rates 60 kg N/ha lower. Two controlled release blends were investigated in these trials. One treatment had 25% of total N coated with sulphur and polymer, while the other had 50% coated. For the nine sites that tested rates 40 kg N/ha lower than a conventional rate, analyses of variance were completed for each individual trial site but none identified a significant treatment effect. As all sites in each group had identical fertiliser treatments, multi-environment trial analyses were undertaken to improve statistical power. The results identified that the controlled release treatment with a 50% blend was significantly less profitable than all the other treatments except for the controlled release treatment with a 25% blend. In contrast, for the three sites comparing the conventional N rate with rates 60 kg N/ha less, treatment effects were identified at two of the three individual sites. However, the multi-environment trial analysis indicated no significant effect of treatment.
机译：使用控制释放和硝化抑制肥料可以通过在某些土壤和气候条件下通过甘蔗来改善甘蔗的可用性和摄取，同时通过浸出，径流和反硝化来降低损失，并使氮气使用效率。本文利用2014 - 55年的十二次Burdekin试验网站的生产和运营数据在增长季节，以评估使用这些肥料的盈利能力。特别是，本文研究了这些肥料是否可以根据六个简单步骤指南维持低于常规速率的N申请率的农民盈利能力。在12个试验网站中，九个测试率为40kg n / ha较低，三个测试率为60 kg n / ha降低。在这些试验中研究了两个控释混合物。一种处理具有25％的总N涂覆硫和聚合物，而另一个涂覆含有50％的涂层。对于测试率为40kg n / ha低于常规速率的九个站点，针对每个单独的试验部位完成方差的分析，但没有发现显着的治疗效果。随着每组中的所有网站具有相同的肥料处理，进行了多环境试验分析以提高统计能力。结果发现，除了用25％混合物的控释治疗外，具有50％共混物的控释治疗明显不如所有其他治疗。相反，对于将常规N率的三个位点与率较低，在三个个体位点中的两个中鉴定治疗效果。然而，多环境试验分析表明治疗没有显着效果。

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