Fate of Nitrogen in Paddy Fields and Nitrogen Absorption by Rice Plants
Fate of Nitrogen in Paddy Fields and Nitrogen Absorption by Rice Plants
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稻田氮的去向及水稻植株对氮的吸收
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
G. Wada
中科院分区：
文献类型：
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作者：
S. Shoji;H. Ando;G. Wada
与水稻植株氮素生理和稻田氮素生化基础研究取得显著进展相比，土壤与植株氮素关系研究明显滞后。这可能是因为控制水稻生长和产量的因素很复杂，而且稻田的性质差异很大。然而，正如后面所述，最近使用稳定同位素N进行的密集田间研究已经提供了大量关于土壤-植物关系或水稻氮素农艺的重要信息。对于考试·派，基于Shoji和Wada及其伙伴•10••••>的调查，Shoji和Mae展示了日本东北部整个生长季节土壤铵态氮行为与水稻氮素吸收之间关系的综合模型，如图1所示。土壤铵态氮在移栽后趋于减少，在分蘖数最多时基本消失。或者在六月底到七月初在日本东北部。在分蘖数达到最大值之后，其数量通常可以忽略不计，但当N被追肥时（图1-a）。
As compared to the remarkable progress in basic researches on both N physiology of rice plants and biochemistry of Nin paddy fields, stud· ies on the N relationships between soil and plant have lagged significantly. It is probably because of the complexity of the factors governing the rice growth and yields, and ·a wide variation in the properties of paddy fields. As described later, recently intensive field studies using stable isotope N, however, have provided a considerable amount of important information concerning the soil-plant relation· ships or agronomy of N for rice plants. For exam· pie, based on the investigations carried out by Shoji and Wada and their associatest • 10 • • • > Shoji and Mae showed a comprehensive model for the relationships between the behavior of soil ammonium N and N uptake by rice plants throughout the growing season in northeastern Japan as given in Fig. l. Soil ammonium N tends to decrease after transplanting and largely disappears at the time of the maximum number of tillers, or at the end of June to the beginning of July in northeastern Japan. It is usually negligibly small in amount after the time of the maximum number of tillers, but when N is topdressed (Fig. 1-a).