How Does Seed Vigor Affect Soybean Yield Components?
How Does Seed Vigor Affect Soybean Yield Components?
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DOI：
10.2134/agronj2017.11.0670
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发表时间：
2018-07-01
期刊：
影响因子：
2.1
通讯作者：
Chavarria, Geraldo
中科院分区：
文献类型：
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作者：
Caverzan, Andreia;Giacomin, Rafael;Chavarria, Geraldo
有几个因素可能限制大豆 [Glycine max (L.) Merrill] 的发芽、生长、发育和生产力。因此，种子的生理质量对于作物的建立和均匀性很重要。在种子品质特性中，活力对于粮食生产起着关键作用。本研究的目的是评估种子活力如何影响节中的群体密度、植物生长、固氮、糖和淀粉含量以及这些对大豆产量构成的影响。处理包括改变 DM 5958 RSF IPRO 品种种子活力水平。采用加速老化试验，将种子暴露在 32 摄氏度的高温下 0、120、192 和 216 小时，以获得 90%、75%、63% 和 48% 的活力水平。现场实验采用随机区组设计，在三个地点进行四次重复。测量根和茎干质量、叶面积、种群密度、株高、茎直径、结瘤、可溶性总糖和淀粉含量以及籽粒产量组成。由高活力种子长成的植物具有更大的芽和根干质量、叶面积、群体密度、茎直径、株高、根瘤数量、根瘤干质量和千粒重量值。生产性和非生产性节的数量以及总可溶性糖和淀粉含量随处理没有显着变化。低活力种子导致植物之间产量变异性增加，而高活力种子由于更大的植物种群密度而导致更高的产量。
Several factors may limit the germination, growth, development, and productivity of soybean [Glycine max (L.) Merrill]. Thus, seed physiological quality is important for crop establishment and uniformity. Among seed quality characteristics, vigor plays a key role for grain production. The objective of this study was to evaluate how seed vigor affects the population density, plant growth, nitrogen fixation, sugar, and starch content in nodes and these influences on yield components in soybean. Treatments consisted of varying vigor levels of seeds of the DM 5958 RSF IPRO cultivar. Using accelerated ageing test, seeds were exposed to 32 degrees C heat for 0, 120, 192, and 216 h to obtain 90%, 75%, 63%, and 48% vigor levels. A field experiment was conducted in a randomized block design with four replicates at three locations. Root and shoot dry mass, leaf area, population density, plant height, stem diameter, nodulation, total soluble sugar and starch content, and grain yield components were measured. Plants grown from high-vigor seeds had greater shoot and root dry mass, leaf area, population density, stem diameter, plant height, number of nodules, nodule dry mass, and thousand-seed weight values. The numbers of productive and unproductive nodes and total soluble sugar and starch contents did not vary significantly with the treatments. Low vigor seeds resulted in increased production variability among plants while high vigor seeds resulted in higher yields due to a greater plant population density.