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首页> 外文期刊>Turkish Journal of Agriculture & Forestry >Effects of Stand Reduction Applied at Different Plant Growth Stages on the Yield and Yield Components of Components of Sunflower
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Effects of Stand Reduction Applied at Different Plant Growth Stages on the Yield and Yield Components of Components of Sunflower

机译：不同植物生长期林分减产对向日葵产量和构成要素的影响

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摘要

The aim of this tudy was to determined the effects of stand loss applied at different growth stages on the yield and yield components of sunflower. The research was conducted during two-years (1994-1995) under dry conditions in Bursa. In this tudy, plant populations were reduced to 25 % and 50 % compared to check ( 60.000 pants/ha) at the 4-, 8-, 16- leaf and bud stages of sunflower. According to the results, no significant reduictions in seed yield occurred when plant populations were reduced by 25 % (45.000 plants/ha) compared to check. However, it was determined that significant reductions in seed yield obtained when stands were reduced 50 % (30.000 plants/ha) from the check. 22 %, 17 %, 29 % and 33 % yield loss occurred when populations were reduced 50 % at the 4-, 8-, 16 leaf and bud stages, respectively. Especially, stand reduction of 50 % at later growth stages (16- leaf and bud stages) resulted in significant yield loss. Significant yield losses were arisen with decrease at head diameter and seeds per head. This observation is substantiated by the high correlations between of both head diameter and seeds per head with yield within 30.000 plants/ha (50 % stand loss) treatments. Because, positive correlations were noted between head diameter and seeds per head with yield at the lowest plant population.
机译：该研究的目的是确定在不同生长阶段施用的林分损失对向日葵产量和产量构成的影响。这项研究是在两年（1994年至1995年）在布尔萨干旱条件下进行的。在该研究中，与向日葵的4、8、16和芽阶段的检查（60000裤子/公顷）相比，植物种群减少了25％和50％。根据结果​​，与对照相比，当植物种群减少25％（45.000株植物/公顷）时，没有显着降低种子产量。然而，据确定，当林分从检查中减少了50％（30.000株/公顷）时，种子产量显着降低。当种群在4、8、16叶和芽阶段分别减少50％时，产量损失分别为22％，17％，29％和33％。特别是，在生育后期（16叶和芽期），林分减少50％会导致明显的产量损失。随着头直径和每头种子减少，产量显着增加。头直径与每头种子之间的高度相关性证明了这一观察结果，其产量在30.000株/公顷（50％林分损失）的处理范围内。因为，在最小植物种群中，头直径和每头种子与产量之间存在正相关关系。

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