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首页> 外文会议>Sweetpotato in food and energy security. >Study on uptake and distribution of nitrogen,phosphorus and potassium in sweetpotato (Ipomoea batatas L.)
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Study on uptake and distribution of nitrogen,phosphorus and potassium in sweetpotato (Ipomoea batatas L.)

机译：甘薯（Ipomoea batatas L.）中氮磷钾的吸收与分配研究。

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Field experiment was conducted to research the uptake and distribution of nitrogen,phosphorus and potassium in purple sweetpotato Ningzi 1. The whole plants were sampled at 15 day intervals,which were separated into shoots and storage roots to study dynamic changes in contents and absorption of N, P,K. The results showed that 11.24 kg of total nutrients was absorbed by the whole plant to produce 1000 kg fresh roots,with a ratio of N,P,K at 1 : 0.69 : 2.32. The accumulation characteristics of N,P, K varied in different growth stages. The absorption of nitrogen by the sweetpotato plant occurred mainly at the early and middle growth stages,followed by a reduction that resulted from fallen leaves in late growth period. In the meantime, phosphorus and potassium were each absorbed over 90% in the late stage. A minor difference appeared at total uptake of N,P,K between shoots and storage roots. The majority of nitrogen was accumulated by leaves and stems,while storage roots absorbed the majority of phosphorus and potassium. The rates of N,P,K uptake were 1∶0.60 ∶ 2.03 in shoots, 1∶0.82 ∶ 2.69 in storage roots.
机译：进行了田间试验，研究了紫薯宁子1号中氮，磷，钾的吸收和分配。以15天为间隔对整株植物进行取样，分为芽和贮藏根，研究氮含量和吸收的动态变化。 ，P，K。结果表明，整株植物吸收了11.24 kg的总养分，产生了1000 kg的鲜根，其氮，磷，钾的比例为1：0.69：2.32。氮，磷，钾的积累特征在不同的生育阶段有所不同。甘薯植物对氮的吸收主要发生在生长的早期和中期，其次是生长后期的落叶引起的氮吸收减少。同时，后期磷和钾的吸收均超过90％。芽和贮藏根之间的总氮，磷，钾吸收量之间存在微小差异。氮的大部分由叶和茎累积，而贮藏的根吸收了大部分的磷和钾。苗期氮，磷，钾的吸收率为1∶0.60∶2.03，贮藏根为1∶0.82∶2.69。

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