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首页> 外文期刊>Potato Research >Stabilising Urea Amine Nitrogen Increases Potato Tuber Yield by Increasing Chlorophyll Content, Reducing Shoot Growth Rate and Increasing Biomass Partitioning to Roots and Tubers
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Stabilising Urea Amine Nitrogen Increases Potato Tuber Yield by Increasing Chlorophyll Content, Reducing Shoot Growth Rate and Increasing Biomass Partitioning to Roots and Tubers

机译：稳定尿素胺氮气通过增加叶绿素含量来增加马铃薯块茎产量，降低芽生长速率并将生物质分配增加到根和块茎

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Much of the nitrogen in crop fertiliser is degraded before acquisition. Technologies that stabilise urea-nitrogen minimise this. Degradation also specifically reduces the amount of ureic amine that many fertilisers initially contain, which is important because this nitrogen form has unique beneficial effects on plants. To investigate mechanisms whereby urea stabilisation increases potato tuber yield, we compare effects of foliar applications of chemically stabilised and non-stabilised urea against industry-standard fertiliser, on the physiology, form and yield of greenhouse-grown Casablanca under identical nitrogen supply. Stabilised urea is tested on Rooster and Shelford yields in Irish and British field trials. Stabilised amine nitrogen (SAN) increases Casablanca leaf relative chlorophyll content and initially reduces shoot growth rate. When harvested shortly after tuber initiation, SAN-treated plants have increased root to shoot weight ratios and we find tight negative correlations between shoot growth rate and root weight: large roots and slow shoot extension occur predominantly in SAN-treated plants. SAN increases ratios between initiation-stage tuber weight and (a) shoot length and (b) shoot growth rate. At a second harvest at mid-bulking, SAN increases high-grade Casablanca tuber yielding. At this later stage, yield correlates positively with shoot weight. In the field, SAN increases Rooster canopy greenness and marketable yields of both Rooster and Shelford. Yield improvements specific to this N form when stabilised are suggested to occur through increased photosynthesis and early-stage increases in root to shoot weight ratio. This phenotype then supports increased bulking-stage shoot growth and shoot-sourced resource for tuber growth. Stabilising urea amine induces high-yielding phenotypes with improved internal nitrogen utilisation efficiencies.
机译：在收购之前，作物肥料中的大部分氮气降解。稳定尿素氮的技术使其最小化。降解还明确降低了许多肥料最初含有的纯胺的量，这是重要的，因为这种氮形式对植物具有独特的有益作用。研究尿素稳定性增加马铃薯块茎产量的机制，我们对不同稳定肥料的叶酸和非稳定尿素对等氮气供应的生理学，形式和产量进行了比较了化学稳定和非稳定尿素的影响。稳定的尿素在雄鸡和谢尔福德在爱尔兰和英国野外试验中进行了测试。稳定的胺氮（San）增加Casablanca叶相对叶绿素含量，最初降低芽生长速率。在块茎开始后不久收获，SAN治疗的植物增加了根部以萎缩重量比，并且我们在SAN处理的植物中发现大根和慢射延长之间的紧张负相关性。 SAN增加起始阶段块茎重量和（a）射击长度和（b）拍摄生长速率之间的比率。在中膨胀的第二次收获时，SAN增加了高档Casablanca块茎屈服。在此稍后阶段，产量正相关地与枝条重量相关。在该领域，圣冠冠孔绿色和雄鸡的可销售收益率增加。当建议通过增加的光合作用和早期增加来产生稳定时，在稳定稳定时产生特异于该N形式的产生改善。然后，这种表型支持增加的肿块生长的膨胀阶段拍摄生长和射击资源。稳定尿素胺诱导具有改善的内部氮利用效率的高收益表型。

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