Responses of a Supernodulating Soybean Genotype, Sakukei 4 to Nitrogen Fertilizer
Responses of a Supernodulating Soybean Genotype, Sakukei 4 to Nitrogen Fertilizer
复制标题
超级结瘤大豆基因型 Sakukei 4 对氮肥的反应
DOI：
10.1626/pps.6.206
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发表时间：
2003
影响因子：
2.5
通讯作者：
M. Kokubun
中科院分区：
文献类型：
--
作者：
Tomiya Maekawa;Motoki Takahashi;M. Kokubun
摘要超早熟大豆基因型Sakukei 4具有高产潜力。研究了不同生育期、不同氮肥用量、不同氮肥类型下的叶片含氮量、光合作用和生长状况，并与其亲本品种恩雷和不结球品系恩1282进行了比较。在结荚期和鼓粒期，早粳4号的叶片干重和叶面积含氮量以及表观光合速率（AP）均高于正常和非结粒基因型。在生殖生长期，Sakukei 4的单株根瘤活性也高于Enrei。这些性状的变化较小的生长条件（田间或盆栽）和施氮量或类型的Sakukei 4比其他基因型。然而，Sakukei 4号保持高叶片N和AP的上级能力并没有提高其生长性能，其生长性能往往不如Enrei。需要进一步的研究来确定开发Sakukei 4有利性状的最佳栽培条件。
Abstract The supernodulating soybean genotype Sakukei 4 is potentially high-yielding. We characterized its leaf nitrogen (N) content, photosynthesis and growth at different developmental stages and under different dosages and types of N fertilizer, and compared it with its parental cultivar Enrei and the non-nodulating line En 1282. At the pod -expansion and seed-filling stages, the N contents per leaf dry weight and per leaf area, and apparent photosynthetic rates (AP) were higher in Sakukei 4 than in the normal and the non-nodulating genotypes. The nodule activity per plant was also higher in Sakukei 4 than in Enrei during the reproductive stage. These traits varied less with the growing condition (field- or pot-grown) and dose or type of N fertilizer applied in Sakukei 4 than in the other genotypes. The superior ability of Sakukei 4 to maintain high leaf N and AP, however, did not enhance its growth performance, which tended to be inferior to that of Enrei. Further studies are needed to define the cultivation conditions optimal for an exploitation of the favorable traits of Sakukei 4.