Seed Hull Fracture Resistance of Upland and Pima Cotton Cultivars

IF 0.7 Q4 AGRICULTURAL ENGINEERING
M. Dowd, C. Delhom
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引用次数: 0

Abstract

Seed durability is a current issue of cotton ginners, who have noted smaller and weaker seed, lower seed grades, and increased seed coat fragments within ginned cotton fiber. To better understand the differences in the seed hull properties of Upland (Gossypium hirsutum L.) and Pima (G. barbadense L) seed, compression testing was conducted to determine the seed hull fracture resistance of both species. Plants were grown in Five Points, CA, U.S., for two years. After roller ginning, seed were conditioned to standard environmental conditions and were compressed until rupture on a material strength tester. Seed of the Pima cultivars generally required greater maximum compressive force and energy to rupture than did the seed of the Upland cultivars. However, when the seed were compressed in a vertical orientation, a few individual Upland cultivars did have compression properties within the range of values observed for the Pima cultivars. Hence, it is possible to find Upland seed with compression properties comparable to or slightly greater than those of some Pima seed. Differences in the data for the two years showed that growing environment affects seed hull strength properties. The results should help clarify some conflicting literature regarding the relative strength attributes of Gossypium species seed.
陆地棉和皮马棉品种的种壳抗折性
种子耐久性是轧棉厂目前面临的一个问题,轧棉厂注意到种子更小、更弱、种子等级更低、轧棉纤维中种皮碎片增加。为了更好地了解旱地(Gossypium hirsutum L.)和皮马(G. barbadense L.)种子壳特性的差异,进行了压缩试验,以确定两种种子壳的抗断裂性。这些植物在美国加州的五点种植了两年。辊轧后,将种子置于标准环境条件下,在材料强度试验机上压缩至破裂。皮马品种的种子通常比旱地品种的种子需要更大的最大压缩力和能量才能破裂。然而,当种子在垂直方向上被压缩时,少数个别旱地品种确实具有在皮马品种观察到的值范围内的压缩特性。因此,有可能找到具有与某些皮马种子相当或略大于其压缩特性的陆地种子。两年来数据的差异表明,生长环境影响种子壳的强度特性。结果应该有助于澄清一些矛盾的文献关于棉种种子的相对强度属性。
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来源期刊
Journal of cotton science
Journal of cotton science AGRICULTURAL ENGINEERING-
CiteScore
0.90
自引率
20.00%
发文量
0
期刊介绍: The multidisciplinary, refereed journal contains articles that improve our understanding of cotton science. Publications may be compilations of original research, syntheses, reviews, or notes on original research or new techniques or equipment.
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