Ranjbar G A
Sari Agricultural Campus, Km 9 Darya Boulevard, The University of Mazandaran, Sari, Iran
Pak J Biol Sci. 2007 Jul 15;10(14):2277-85. doi: 10.3923/pjbs.2007.2277.2285.
Aim of this study was to determine planting date effects on Nodal distribution of yield and its components in nine indeterminate soybean cultivars. To meet such a purpose, a split plot design based on a randomized complete block layout with six planting dates (24th April, 10th and 27th May, 10th and 26th June and 11th July) as main plots and nine cultivars (Williams, Clark 63, SRF 450, Steele, Hark, Corsoy, Blackhawk, Woodworth and Bonus) as sub plots have been used in five replications. The results have clarified that height, branch number, pod number, grain number and seed weight plays an important role on yield increasing. So that, medium maturity cultivars have producing maximum number of pods, grains and seed weight in their upper two third of canopy. Also, various cultivars have indicated different reactions for yield components, so that, Williams and Woodworth (medium maturity cultivars), Steele and Bonus (early maturity cultivars) have produced larger seeds in different planting dates. Generally, Woodworth, in comparison with the other cultivars, demonstrating superiorities in all the considered traits. Maximum amount of pod number, grain number and seed weight in early maturity cultivars was belong to 27th of May planting date, however, for Woodworth and Clark 63 (medium maturity) it was 24th of April and 27th of May, respectively. The highest 100 seed weight per node were produced at 26th of June and 27th of May planting dates by Woodworth and Corsoy, respectively. Differences between planting dates for 100 seed weight in Clark 63 and Bonus were not significant.
本研究的目的是确定播种日期对9个无限结荚型大豆品种产量及其构成因素的节位分布的影响。为实现这一目的,采用了裂区设计,基于随机完全区组排列,以6个播种日期(4月24日、5月10日和27日、6月10日和26日以及7月11日)为主区,9个品种(威廉姆斯、克拉克63、SRF 450、斯蒂尔、哈克、科索伊、黑鹰、伍德沃思和博尼斯)为副区,重复5次。结果表明,株高、分枝数、荚数、粒数和种子重量对产量增加起着重要作用。因此,中熟品种在其冠层上部三分之二处产生的荚数、粒数和种子重量最多。此外,不同品种对产量构成因素表现出不同的反应,威廉姆斯和伍德沃思(中熟品种)、斯蒂尔和博尼斯(早熟品种)在不同播种日期产生了较大的种子。总体而言,与其他品种相比,伍德沃思在所有考虑的性状上都表现出优势。早熟品种中荚数、粒数和种子重量的最大值分别属于5月27日的播种日期,然而,对于伍德沃思和克拉克63(中熟品种),分别是4月24日和5月27日。伍德沃思和科索伊分别在6月26日和5月27日的播种日期产生了每个节位最高的百粒重。克拉克63和博尼斯的百粒重在播种日期之间的差异不显著。