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首页> 外文期刊>Canadian Journal of Plant Science >Potato yield and phosphorus use efficiency of two new potato cultivars in New Brunswick, Canada
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Potato yield and phosphorus use efficiency of two new potato cultivars in New Brunswick, Canada

机译：加拿大新布伦瑞克两种新马铃薯品种的马铃薯产量和磷利用效率

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This 2-yr (2013 and 2014) study evaluated the variation in tuber yield and selected indices of phosphorus (P) use efficiency of two new potato cultivars [AAC Alta Cloud (AC) and AAC Alta Strong (AS)] versus Russet Burbank (RB), the french fry industry standard. Initial P levels and P saturation index [(P/Al) x 100] ranged from 85 to 89.5 mg P kg(-1) and from 4.6% to 5.6%, respectively. A complete randomized block design for each variety was laid out in three adjacent plots with six P fertilization rates. The average tuber yield ranged from 29.06 to 36.81 Mg ha(-1) for AC, from 27.56 to 41.50 Mg ha(-1) for AS, and from 38.15 to 42.02 Mg ha(-1) for RB, with the highest yield observed in 2014. Tuber yield response to P application was described by the quadratic-plus-plateau model for AC and linear-plus-plateau model for AS with a mean critical (above which the yield response to P applications is unlikely) P rate of 40 kg P ha(-1). Russet Burbank did not respond to P application. The trends of P uptake efficiency (PUE) for AC and AS mirrored that of tuber yield, while RB had a linear increase in PUE with P rate. The study highlights that current P recommendations for potatoes can be reduced without affecting yield, thus increasing farmers' economic returns. It also reveals the need to test optimal fertilization levels for new cultivars.
机译：这项2 yr（2013和2014）研究评估了两种新马铃薯品种的块茎产量和所选磷酸含量效率的变化[AAC ALTA云（AC）和AAC ALTA强（AS）]与relslub urbank（ rb），法国油炸行业标准。初始P水平和P饱和度指数[（P / Al）×100]分别为85至89.5mg P kg（-1），分别为4.6％至5.6％。每个品种的完整随机块设计被布置在具有六个P施肥率的三个相邻地块中。 AC的平均块茎产量为29.06至36.81mg HA（-1），27.56至41.50mg HA（-1），均为RB的38.15至42.02mg HA（-1），观察到的最高产量2014年，对AC和线性加压模型的二次加上高原模型描述了对P应用的块茎收益率响应，因为与平均关键（以上，对P应用的产量响应不太可能）P速率为40 kg p ha（-1）。 Russtr Burbank没有回应P应用。对AC的P吸收效率（PUE）的趋势和簇生块产量的镜像，而RB具有P速率的线性增加。该研究突出显示，在不影响产量的情况下，可以减少对土豆的目前的P建立建议，从而增加了农民的经济回报。它还揭示了测试新品种的最佳施肥水平。

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